Spontaneously Combusting Elephants

Thought you might all like to have a chuckle, as I did when I recieved this saftey alert. Priceless simply priceless... Enjoy ;) Apparently the concrete Budda's weren't to crash hot either. Pardon the pun.

Posted by Lftndbt 10 years ago

Numatic vs combustion

This is a discussion about the advantages and disadvantages about using nematic or combustion technicsto launch whatever.

Posted by Brass bum 10 years ago

Instantaneous combustion.

So here's the story. Me and my friend were walking home from school when suddenly he instantly combusted into a huge fireball. RIP Connor Missed by many.

Posted by Hiyadudez 7 years ago

~News Flash~ New group- "Combustables"

CombustablesEver get the feeling something is just not right?Nothing in particular is "wrong", yet a clouded doubt over lifespan of a particular item or one of your projects remains?Ever thought this isn't going to last the week before it goes ka POOF into flames?? This is a group to display all your hard work that some day may combust due to either*Builder incompetence/inexperience.*Design flaws or parameters.*A weird feeling you get that it's going to blow up.*You made it to combust.Please feel free to join and add you fine examples of your questionable work.Please enjoy and I hope you all make it here to post... Good luck

Posted by Lftndbt 10 years ago

Engine Cumbustion & Etc.

I've been knocking around an idea in my head and I was wondering if anyone had an answer to a few problems associated with said idea. One of the problems/road-blocks is how do modern cars run? More specifically, is the gasoline that goes into the pistons for combustion an actual air/gas mixture, or is it air/liquid-gasoline? And is there a way to manually adjust the ratio of air-to-combustible? The reason I ask is because I was hypothesizing whether or not it would be feasible to replace gasoline with a more efficient combustible, and this combustible would greatly depend on what is actually put into a modern petroleum-based car engine's pistons. Thanks for any info!

Posted by kenizl86 3 years ago

Pulsejet engine turbulence model

Hello everyone i have conducted several pulsejet engine tests but today i tried to simulate a pulseejet engine in Ansys fluent 14.0 and here it is. This is a K-e model. The peak pressure at the instant of combustion was 2.5atm. The maximum velocity reached is about 800m/s and the peak temp was about 3000K.

Posted by ganuganu 5 years ago

Mini heather-stove-combustion chamber for diesel fuel droplet

Hi word! I like to find if there is a project, or  it is made already, a mini  stove, gravity filled diesel fuel, droplet, which burn with blue flame. Not bigger than a alcohol stove made out from pepsi - bier can. Appreciated any answer about this topic. Kresimir Pregernik  dipl.ing.

Posted by KresimirPregernik 4 years ago

Can Non-Hybrid Cars Get 100+ MPG Today?

  We're not talking about hybrids here; our topic is cars powered by the basic IC-engine that relies on gasoline and not electric motors. Today's gasoline engines are not designed to combust/burn gasoline efficiently. Even with the advent of using high pressure fuel injection techniques that are computer controlled, we still fall short of the mark. Partly because liquid gasoline can't burn, only gasoline vapors burn, and there lies our problem. The same goes for injecting the high pressure droplets of fine-mist liquid gasoline that enters the engine cylinder using our current nozzle ejector technology, it doesn't all burn at the same time! Engine designers assume that these droplets are instantly vaporized by the engine's hot cylinder walls, and then instantly explode/combust when ignited by the sparkplug. Not true, up to 2/3 of the fuel isn't vaporized and doesn't combust until later on in the cycle. The 1/3 that gets almost-instantly vaporized and burns will do so within the several thousandths of a second (Fig-1) it has before the piston moves down its 1/2-stroke (out of today's 4-stroke cycle) completing the engine power-portion of its cycle. This releases power and tremendous heat which indeed vaporizes the remaining ~2/3 of our fuel from its liquid droplet form, but too late. It essentially does so when the power stroke is almost over or the piston is just about ready to move into its up-stroke (2nd stroke of our four stroke cycle) phase. So, because of poor vapo-timing we have 2/3 of our fuel virtually wasted by exploding at near the bottom of the power stroke. This incorrect explosive timing, which happens to most of our fuel, imparts very little energy into the crankshaft because its effective "moment" (a product of explosive force and radial-component distance from crankshaft center) is insignificant by then. Various attempts at adjusting the combustion timing spark hasn't made a significant difference. Even though ~2/3 of the fuel is now exploding and providing a huge force, its small "influence" arm distance is rapidly diminishing to zero, and any huge downward force times near zero arm-length is still zero. Some clarification here, technically thermal-efficiency is not improved, pretty much all of the gasoline gets combusted today. That means the energy of the fuel is almost totally released, but not effectively used. The problem is the timing it takes to convert fuel-injected gasoline droplets into vapor to combust at the correct engine rotational time and extract that expended energy. If you did the math for any size engine rotating at say 3200 RPM, you would find that a 4-stroke engine can only extract that energy from combustion during one of the four strokes. And the time it takes to make that stroke happen is only about 9.4 thousandths of a second or 9.4 milisecs (msecs). Now picture the piston just below TDC, all its valves closed, under pressure and containing all the fuel and air it needs to combust. At this point our deadly cocktail has about half of the 9.4 or about 5 msecs to complete combust after the timed sparkplug ignites it. The half factor exists because the max portion of our power stroke (moment arm) occurs at the mid-stroke of the piston sliding down and turning the crankshaft. If all of our fuel isn't combusted by then, the moment-arm or distance from the piston-center to the crankshaft quickly reduces to zero. Again, only vapors combust within a healthy 2 msecs (Fig-1), while fuel droplets take a relatively long time (>5 msecs) to vaporize before it can combust. Unfortunately nature is stubborn and vaporizes ~2/3 of our injected fuel droplets only during roughly the second half of the power stroke. So this huge amount of energy gets wasted because even though the forces of combustion are huge, its moment arm is rapidly approaching zero. Infinity times zero is still zero! Engine designers/engineers have been plagued by this phenomenon ever since the creation of the 4-stroke gasoline or Otto cycle engine. We need to improve this intermittent combustion/explosion process by combusting all of our injected fuel at the correct timing sequence. This is accomplished by injecting only vaporous fuel which will produce ~3X the power we now get. Another way to state this is, for the same power that we now get from a gasoline engine, if we burned the fuel correctly, we would only need 1/3 the fuel consumption to get 3X the current MPG.

Posted by RT-101 6 years ago

jet engines

Hey! i want to built a gas jet engine without the turbocharger! can u help me with combustion chamber and inside shaft ! and one more question! how to convert the power of a jet engine in speed!?

Posted by hreashi 8 years ago

Spontaneously-Combustible Flour?

Well, I know that if you put finely powdered stuff, like flour or sawdust, it has a chance that a spark will form and create a huge (and I am talking HUGE) fireball. Watch this video (those stupid kids): The above video amuses me: They state do not try this at home, but they apparently did. They obviously didn't know what they were doing, because if they had, they wouldn't have risked their friend (or at least severely burning him).Does anyone know the percentage chance that this will happen if, say, I took a cup of flour and use a shaker (or just a shaking motion) to spread it out into the air? If I wanted some flour to combust, would I be better off (not in health, in entertainment) to just use a match?Oh, and yeah, I am 13, but I am a bit more mature than other people I know that are my age. I'm glad they don't know about this site, because if they did, they would already be . (Seriously.)Thanks in advance!

Posted by Bran 11 years ago

potato cannon?

I remember seeing a video of a guy shootin nerf footballs out of an air cannon which he reloaded like a bolt action grenade launcher. i cant find it anywhere!!! help plz?

Posted by BigBossXtreme 9 years ago

B.S.R. 75 bolt action spud gun

This is my latest creation a breech loading bolt action spudgun. video at.....http://www.youtube.com/watch?v=tnnbcmTH0pc

Posted by spudrouge420 8 years ago

stirling engine

This is just my burning question for anyone who has mad skills in engineering. how do I build a small stirling engine generator for home use to run off a non-combustion heat source ie solar panels?

Posted by djsc 10 years ago

Combustion Chamber for high voltage spark

Based on Sir9's project http://sdch2o.free.fr/vrac/Sir9-Plasma-Steam-Engine.doc I am preparing to make my own version: The plan is to create a Tesla Turbine powered by steam which is made on the plasma spark from a Tesla Coil - Presumably if Sir9 used just 110 V, the really high voltage of the Tesla Coil should give me Big effects I am not sure about what size, shape and material I should use for the combustion chamber, and whether I can use multiple spark plugs safely. I'm planning to use a small 220v // 2,1kV microwave oven transormer for the coil just to keep things farely safe for the beginning and a turbine made of hard disk drives (about 16 plates) sealed in a plexi-glass chamber I have a lot more questions coming up every minute, need any help I can get - this is my first project of it's kind Thnx

Posted by skyw4lker 8 years ago

Jet engine parts

Hi Guys Can anyone please help me. I have recently purchased a few parts for a jet engine off ebay as a possible project but can't find what engine they may have came off.  The combustion chamber is different to what you see in smaller rc jet engine. The turbine wheel blades are dove tailed like on bigger jets and the compressor wheel has an inducer of around 95mm. I would imagine if this could ever run again it would produce a serious amount of thrust. I have uploaded some photos and would be grateful of any help.  

Posted by hughes674 4 years ago

chemicals that expand when mixed

Can you guys give me a list of some chemicals that expand when mixed? the reaction's can't be combustion reactions though. that's the only limiting factor.

Posted by mexx.admin 9 years ago

Comparative Environmental Friendliness of Internal Combustion and Electric Vehicles

I would like to know which type of vehicle is more environmentally friendly. Electric and hybrid vehicles are gaining in popularity and they are touted as green, but they clearly require more energy and resources in their manufacture due to their battery packs, rare earth metals and electric motors. On the other hand, traditional internal combustion vehicles require fewer resources to manufacture. However, I imagine that it converts fossil fuels to energy less efficiently than electrics because the conversion process is smaller, unlike in large scale power plants (not sure if this is true). Electric === More resources to create (-) Power Plant (Generates energy efficiently?) (+) -> Power Lines (A: energy loss) (-) -> Motion +,-,- Gas === Fewer Resources to create (+) Combustion Motor (Generates energy inefficiently? B: energy loss) (-) -> Motion +,- I'm pretty terrible at explaining this, but is the energy loss at A or B worse when comparing the two systems? For electrics to be viable, it must offset the higher creation cost. Just wondering which one is actually more "green" when you factor in production (disregard cost of transporting fossil fuels to gas stations and power plants).

Posted by crestind 7 years ago

Piston jump boots

I dunno if you have ever seen this guys 'rocket boots' (not really rocket powered) but they are sort of neat. They do not get the same results as simple mechanical leaf spring sort of moon boots I see, but the concept is pretty interesting for those of us who are fans of combustibles.  this is a video http://www.youtube.com/watch?v=w7s-tnzPZ3c article http://www.technovelgy.com/ct/Science-Fiction-News-Comments.asp?NewsNum=740 Now my question: How would you improve this sort of unimpressive piston powered boot? I was thinking if one could double or even triple the chamber size of that piston, or use multiples of them, maybe use a more potent combustible than gasoline.

Posted by ThorsMitersaw 7 years ago

Propulsion Engineer

I want to design new propulsion systems that don't need to use combustion, what should I major in, I was thinking of majoring  in Aerospace engineering and minoring in Electrical engineering. Any suggestions? p.s. the propulsion includes, but is not limited to: anti-gravity/warp-drives  (Which physics says is plausible)

Posted by monkhm 7 years ago

fluidized bed technology

Im currently working this one in my master's degree.. i let you know about my findings when i'll finish this.. as of now, i'm open to any suggestions or comments.. also, i need more references, materials and books, even journals that would deepen my understanding on this research..

Posted by mikulo 9 years ago

Spupgun problems and help

I love to build spudguns and air cannons. But like everything you encounter a couple problems. So I decided to make a topic for everyone to post their questions and problems with spudguns and air cannons and for other people to post answers to them. Enjoy

Posted by ostomesto 7 years ago

Sparks fly when you machine titanium.

Hey everyone, I was surprised at what happens you machine titanium at 3200 rpms. Check out the sparks that flew while machining a 2"x1/8" titanium disc. Some sparks would even combust in mid air like tiny fireworks.   Brent

Posted by Mrballeng 4 years ago

3X Gasoline Engines Sniff Vapors and Burn Water

Sounds ridiculous doesn’t it? How can water possibly be turned into a useful fuel by just burning it? Sure we can use hydrolysis to separate water into its hydrogen and oxygen gases, and then burn the hydrogen gas as fuel, but that’s not what I’m talking about. Believe it or not, jet engines do it, they have used water to enhance engine thrust, so why not have IC-engines do the same thing? There’s a catch here, since only vapo-engines (  http://goo.gl/QQ42k ) are capable of performing this trick successfully, they must first be introduced into the design mix. Since IC-vapo-engines burn very effectively they run hot, and water would be used as a better alternative than injecting extra wasteful fuel to cool down the engine as is done in today’s engine to prevent knocking. Why don’t we just inject water in today’s engines you ask?  Because they run so poorly already, that the water would extinguish the IC-combustion process. In technical jargon this is known as the ability for an engine to burn lean with an air-to-fuel ratio greater than ~15. Today’s engines can’t sustain a leaner combustion than ~22  without extinguishing themselves. By adding water droplets we further increase this ratio to unsustainable conditions. Unfortunately, this wasteful, richer burning keeps the engine running better by keeping the fuel cooler. In contrast, our vapo-engine is capable of burning unbelievably lean ratios of ~30+. Lean combustion means almost no pollutants and virtually green combustion exhaust products of only CO2 and water. No catalytic converters necessary here, as opposed to running today’s rich engines with their unavoidable polluting exhaust emissions and heavy reliance on catalytic converters. So the irony here is that since IC-engines already run ratty, let’s waste a little more fuel and run richer just to cool down the engine. This prevents engine knocking (the dieseling of an engine due to unwanted, poorly timed, premature combustion) which occurs from the pitiful amount of fuel that does vaporize and burn correctly. Sadly, engineers have cleverly learned to waste fuel for the sole purpose of keeping our IC-engines cool, above and beyond the engine’s normal water cooling system. It gets even better, as the richer the engine runs the more we need to rely on expensive catalytic converters to keep exhaust emissions in check!  Vapo-engines also require cooling, even more than today’s engines, but their advantage is the capability to burn very lean. So instead of ridiculously injecting extra fuel to cool them, like today’s engines, we inject water droplets mixed in with the injected fuel vapor. The water droplets perform three functions; 1) they reduce excess fuel consumption, 2) they cool the engine walls to prevent pre-ignition and knocking which provides better combustion, and 3) they enhance the fuel-vapor detonation force created on the piston from the expanding superheated steam which further helps engine performance. So in a way we are burning the water to generate steam power like a locomotive.   

Posted by RT-101 6 years ago

Calling all Potato Gun Aficionados and wanna be Combustion Scientists

This is message to anyone who enjoys hearing the sound of forced combustion, or better yet, the loud crack of a potato gun being fired. My co-conspirator and I are in need of some mathematic assistance. Ideally we are looking for a “magic” formula concerning barrel length to blast chamber ratio for optimal performance. The ideal fuel would be propane or butane. We have been using a 4” by 33” blast chamber coupled with a 3” by 44” barrel. So far, we have had significant success with this combination, but are curious if there is a better ratio to use. With our current specs, we are able to shoot a 3 – 4 lb. ball of plaster over 250 yards (this is the carry distance, not the total distance traveled) at a 47 degree angle. If anyone out there knows a formula or has advice on Blast Chamber to Barrel ratios we are greatly interested to hear what you have to say.

Posted by benihana 10 years ago

Jet engine turbines - how they work?

Hi, I know how jet engines work except for one aspect and for the purpose of this question I'll use http://en.wikipedia.org/wiki/Turbojet for the discussion so we're all picturing the same thing and because the illustration shows the engine quite simply. By looking at the picture, I understand that turbojet can't start itself, it needs 'spinning up' before it is ignited at which point it should sustain itself spinning and then provide thrust. I understand that because the turbine is spinning, the compressors at the front compress air into the combustion chamber, where fuel is injected and then ignited causing expansion, driving the rear turbines to drive the front compressor, and also providing thrust. What I don't understand is why the expansion in the combustion chamber isn't equally providing thrust in both forward and backward directions, and why it isn't acting on the compressors and causing them to be turbines just like at the rear of the engine.  What directs the expansion towards the back of the engine? and what stops half (or at least a large fraction) of it pushing back towards the front of the engine? I know rockets have an expansion but it's usually a tube with one end closed so all of the expansion is forced out of one end, but both ends are open on a jet engine? The question arose when I was looking at tin can turbines http://www.youtube.com/watch?v=2c1i_UIEsSM&feature;=related and I was thinking how I would build a small one myself but I couldn't visualise why the combustion isn't pressing against both the front and rear propeller cancelling any rotation out, and providing equal thrust in both directions? Thanks for your time!

Posted by arichardson 6 years ago

Solar incineration of biomass for increased energy?

Hi. I'm prototyping a solar energy system which basically collects, concentrates, and transports raw solar energy, and I'm thinking of various applications for it. My main interest is in water purification, but electricity is an obvious one as well, which means steam or, preferably, stirling engine generation. So say I had six square meters of sunlight concetrated into a light pipe and filling an insulated chamber. WIth losses that's going to be at least 5 kiloWatts of power, which is quite a bit and would run an engine pretty well. But what if you had some kind of combustable material in the chamber, like waste organic matter? It would burn, obviously, and release extra energy. And with the chamber full of extra heat largely in the form of light, I'm thinking you'd get a very efficient combustion of the matter and some ammount of the smoke. So, does anyone know if this would be worthwhile? Would the extra energy gained make it worth it? What would the emissions be, compared with just setting fire to it all? What happens to carbon at these kinds of temperatures? etc. Cheers!

Posted by SolarFlower_org 9 years ago

potato gun contest

I am proposing a potato gun contest but not any kind of potato gun contest. i am proposing a concealed weapons potato gun contest. air or combustion and it has to screw apart to fit in a briefcase or on your person it can also already be small enough so that you wont have to take it apart use your imagination i am eager to see what people come up with also disguised potato guns are also welcome. thanks for humoring me PhD

Posted by syncmaster153t 10 years ago

OxyHydrogen Internal Combustion Engine Boosting Anyone?

So folks I think I'm gonna give the water-into-OxyHydrogen-into-fuel booster gag a try. There's a couple of shady ibles on the subject, so I wanted a little more professional input. I'd like to go about this all scientific like so my questions kinda boil down to:Measure / calculate the amount of air used by my car in one second (in volume)What's the best catalyst to useMeasure the amount of hydrogen and oxygen produced in one second (in volume)Accurately measure fuel efficiencyI met a chap who did it to his car, I'll try to wrangle some out of him. Bit of an interesting blighter, 50-60ish black chap with dreadlocks from Gloucester.I'll be giving it a try in a less then optimal test vehicle however. Carburated '94 Buick Century, V6. I'm sure the idea would "theoretically" work better in a smaller engine. If this system works at all (upwards of 10% increase in efficiency), I'll make an improved version and iblify it. The car will be used on primarily the same route, a good mix of highway and 40 ish speeds, and I'll leave the air conditioner off full time so's not to get false readings.Any input plz? I'll post some pics of my brave victim car later.

Posted by KentsOkay 8 years ago

Using Tungsten to Ignite Gas?

Alright, so Tungsten (which you may or may not know, is my favorite element) is combustible when current passes through it while it is exposed to oxygen. Could I place a bit of tungsten I scavenged from a lightbulb in a small pool of gas (or alcohol) while running 9 volts through, and get a reaction? Would having the whole bit of tungsten under the gas work, or would I need a piece above the gas also? I'm not looking to blow things up, just trying to do a bit more "dangerous experiments" before school starts. Thanks all!

Posted by Bran 11 years ago

Car runs along at 376.59 mpg and gets a Guinness World Record

The funny thing is that this happened 35 years ago and the car that did it was from 1959. It's not exactly a consumer vehicle, but still impressive.Some info: - the vehicle was a 1959 Opel T-1 - interior completely stripped except for a plastic seat for the driver - top was chopped to lose drag - super-hard low-friction tires used - was driven at 30 mph - chain drive used to lose weight - the fuel line was insulated and heated so the gasoline entered the combustion chambers as lean vapor link

Posted by fungus amungus 10 years ago

how do I build a chemical car?

Hello, my name is Taylor Love. Right now my school is having us do a science project where we need to use chemicals to propel a toy car across the room. sounds easy right? oh wait there's a catch. no combustion reactions, or explosions. :( got any ideas besides the usual baking soda and vinegar trick? any help would be great. if anyone knows how we could make a battery powered car go across the room, that'd be pretty cool too. but we have to make the battery from scratch.

Posted by mexx.admin 9 years ago

Would it be possible and/or probable to achieve combustion by adding a small amount of water to a specified powder mixture?

I've been looking at instructables for the past few months but only recently joined.something that really interested was an instructable about creating fire from a drop of water https://www.instructables.com/id/How-to-Start-Fire-with-Water/ and i thought that that was so cool. But, some of the comments suggested that one of the substances used, NH4, or Ammonium Nitrate, was now illegal. Is there possibly a better way of having that same type of powder that when it comes in contact with water, it will light on fire? If so, please tell me or give me a link to something else that will tell me how to do so (I don't even know if that actually was ammonium nitrate, but that is what the creator said.).

Posted by The Musicman 9 years ago

Help Me Establish Gas Station Fraud- By Exposing Fuel Manipulation.

Prelude:Every week I only ever travel the same route, at the same time, with the same amount of traffic on the road.I fill my cars fuel tank once a week, with $50AU of petrol.The prices lately have been stable and around $1.30AU/LWhat this post is about is the fact that due to me travelling the exact same Km's per week, I have noticed a significant difference between the two petrol stations fuel that I fill at.Can anyone educate me as to why when I fill at one station I get 8 days of travel and when I fill at the other station I only get 4 days of travel?Once again I am filling the same amount of fuel at each station, just one stations fuel (Major corporate outlet) seems to be of a much lower quality.Is it possible that something is a-miss with this situation. Is there a variable im not considering?After 4 months of weekly refills I feel that conclusively, one stations fuel seems to combust better than the others.Is this possible and if so are there any home experiments I could try to prove my theory via testing the fuels combustion/quality.I only write this as I sit here on a week, where I was forced to fill up at the "suspect" station. Im on day 3 now and my fuel is red lining... What is happening?I know the difference of 3 -8 days is a massive, surely others would have noticed this also. I thought I was mistaken the first few times it happened. But now I am positive, something is wrong.I might add, I use premium fuel with the same octane level at both stations.Could that be it? Would they be mis-quoting the octane level in their fuel? That is the only thing I can think of.

Posted by Lftndbt 9 years ago

Green and sexy car show

The Morgan LIFE car will get it's first UK airing at the Eden Project next weekend.The Morgan LIFE car, probably the sexiest green car in existence is a fuel cell-powered electricsports car built by Morgan Motor Company and startup efficient transport company RiverSimple. Research and development is by QinetiQ, Linde, Cranfield University and backed by BERR. This is its first UK outing.Four stacks of fuel cells convert the hydrogen fuel into electricity to run a super efficient motor generator attached to each wheel. Energy recovered in braking is stored in ultra capacitors rather than batteries, and end to end the performance is estimated to be equivalent to a 150mpg petrol engine. With a top speed of 85mph, 0-60 in less than 7 seconds and a 250 mile range, the mix of technology has been packaged by Morgan to add yet another unique twist to the project. Using only the best and lightest materials, aluminium, wood and leather, the Morgan DNA is clearly visible, adding a new dimension into an environmentally sensitive concept.And Lotus will be showcasing their most powerful Exige yet:The Lotus Exige 270E Tri-fuel is the most powerful version of the Lotus Exige ever, and it runs on any mixture of gasoline, bioethanol and methanol. It is the latest research vehicle from Lotus Engineering, the consultancy division of Group Lotus plc.Emerging technologies will allow alcohol fuels such as methanol, already a proven internal combustion fuel, to be made synthetically from CO2 extracted from the atmosphere. A fuel derived renewably from atmospheric CO2 would be a key piece of the jigsaw allowing society to transfer to sustainable, renewable, carbon-neutral internal combustion.Lotus Engineering is researching the use of sustainable synthetic alcohols as future fuels for introduction within 15 - 20 years.The Exige 270E Tri-fuel is part of Lotus' research into the complex combustion and calibration processes for powering vehicles on mixtures of alcohol fuels and gasoline, which will be important for a successful transition from today's fuels. Its flex-fuel technology gives a practical route to the introduction of sustainable synthetic fuels. Using an alcohol sensor in the fuel system and the advanced Lotus engine management system, the Exige 270E Tri-fuel runs on any mixture of gasoline, bioethanol and methanol. This is all happening at the Eden Project in Cornwall, one of the UK's flagship environmental projects, with some of the world's largest biodomes built into an old claypit.All the major manufacturers will be flaunting their newest, greenest models including Ford, Peugeot, Citroën, Fiat, Volkswagen, SEAT, Honda, Axon, Lotus, Saab and Morgan. Vectrix's electric motorcycle will also be on show, and the hydrogen-powered Morgan LIFE car will make its first public appearance (in the UK).There will also be exhibitors demonstrating how to maintain and even insure your car in a greener way. One stand will feature a driving simulator that they claim can teach you to drive in such a way that your carbon emissions are cut by 15%, there will be a pedal-car race track for the kids, and a Grow Your Own car trail around the rainforest.We visited last Summer, and can recommend it to anybody. If your not aiming for a specific event, go on a Tuesday (it's quieter) and check opening times - opening times on some days are several hours longer than others.Eden Project

Posted by Kiteman 10 years ago

best chamber to barrel ratio

Okay I have not built a cannon yet as such, as I am going to make my first one awesome but I've done some research and found the golden ratio for efficiency for chamber-barrel size, assuming the chamber is always the same volume a chamber is 1.6, now I'm guessing a bit from now on but it seems that that maximum efficiency is approximately 1.61803399 or the golden ratio that keeps appearing in our world, I just thought you guys would like to know for the design stage as this is what I'm going to be using when I make my gun. also is it worth spending extra for a high flow blowgun over a normal one for the pilot valve to my 1" sprinkler or wont it make a noticeable difference P.S. if my calculations are wrong please, if you know more ( I'm only 13) please correct me. I have worked this out from pneumatics, not combustion's or hybrids. expect to see my gun soon!

Posted by cheeseboy 9 years ago

Unmanned vehicular robot fuels itself

03.05.09 -- In all the futuristic visions of robotic technology, there's always one buzzkill that brings them back to reality: the power source. How do you keep robots rolling smoothly? The Defense Advanced Research Projects Agency (DARPA) is funding the development of a robot that may have the answer to this.According to company president Dr. Robert Finkelstein, Robotic Technology, Inc. of Potomac, Md., is developing the Energetically Autonomous Tactical Robot (EATR), an unmanned vehicle robot designed to collect biomass leaves, wood, grass, anything combustible and use it through burning to fuel itself. "The idea is to have a robotic ground vehicle that can go out on long-range, long-endurance missions without human intervention," says Finkelstein, describing it as the ground equivalent of long-range unmanned air vehicles. The EATR will be able to retrieve items of interest as well, or act as a weapons platform....In addition to its military applications, Finkelstein also envisions other applications, such as border patrol or agricultural work.here is the link to the full article

Posted by Goodhart 9 years ago

Integrating Highschool Sciences

Irene Duke, Kate Hoff, Lyndsay Carlisle and myself are participating in the MIT course 11.124, _Introduction to Teaching and Learning Science and Mathematics_. We have a variety of teaching interests: Irene hopes to teach chemistry, Kate to teach Physics, myself Physics or Mathematics and Lyndsay hopes to teach social justice / political history. Provided Make magazines as inspiration, we were tasked to design a joint activity, merging four high school classes of these topics for a period of weeks or months. We developed the ideas described in this first entry over the course of a class period. Hopefully, we'll take the time to expand each step into an instructable, possibly including trials by fire teaching 8th-11th graders. The material is structured by conservation of energy and resources, inspired by the articles of Tim Andersen. The final demonstration we envision motivates the particular material we wanted from each field. A bicycle wheel is drives an alternator transforming mechanical energy into electrical. The electrical energy is used to run a electrolysis process, rendering separate measurable quantities of Hydrogen and Oxygen. The Hydrogen and Oxygen are then combusted for the students. The amount of mechanical energy can be measured, as can the electrical. The binding energy of H_2O can be used to determine the chemical potential energy rendered. Finally, the combustion both demonstrates the energy's new form, and the difficulties in storing energy. The difference between power and energy underlies all of these experiments. Conservation of linear momentumn should be a familiar topic with the students. Conservation of angular momentumn can easily be introduced at this point, demonstrated with the bicycle and a fly wheel. Chaning the orientation of the wheel can be exteremely difficult. For the chemical portion of the experiment, stoicheometry should be familiar to establish the link between the amount of gas generated and the energy invested. The most appropriate mathemetical tools are statistical. Sampling, linear regression and averaging would prove useful throughout the experiments. Global economic relationships leading up from the colonial period would perhaps be the most applicable topic form history or the social sciences. Though not a technical detail, an important aspect of executing such an idea involves the actual deployment of resources. Students could, for example be broken up by their topic of interest, whether it be the physical, chemical or social aspects of the project. Next, new groups would be formed with one or two members from each subject area. These groups could then attempt to execute the design from the first slide, or one which is similar. Throughout, the students will present their thoughts or understanding to the teacher. This design project should perhaps be phrased as simply turning mechanical energy into hydrogen. Students with social scientific background might be responsible for estimating the costs of the implementation in different settings, and that would be used to drive a larger scale version. So, before getting started on building and documenting this project, do people have suggestions? What worked to combine the physical sciences for you? What might have worked?

Posted by mmt 11 years ago


I have built this woodstove for my tiny house. I had tight space limitations. I chose a used 20 gal+/- propane tank. I cut out a door and exhaust opening with a disc on my angle grinder. Helpful hint. I attached hinges befor making the last cut on the door. It lines up perfectly. I found a piece of 6" well casing for my stack. An old piece of sheet steel for the top, in which I cut a 4" hole for my flue. I am using the tank upsied down as I am using the original valve opening, which is 3/4" pipe thread for outside combustion air. I welded the tank onto a 15" used steel car wheel for a sturdy stand. I will not be burning wood only manufactured logs like from Tractor Supply and will be making used paper for making presed pulp logs. I am letting the High Heat paint fumes air off before I fire it up. I also have a CO and Smoke Detector plus a Fire Extinguisher. There is a dampner in the flue and a thru wall fixture. It is mostly airtight. I installed 1/8" flanges on in and outside of the door. Used  a black wrought iron gate latch for a closer and some brass machine screws for bling. lol If anyone does this make sure you know what the hell you are doing, if not don't try this at home.

Posted by SamDee43 1 year ago

The ultimate challenge?

There are always good contests available for those keen on competing, but what about a real challenge that might run for many months? I am talking about rediscovering ancient technologies and ways of creating things. We have a lot of evidence that is in massive contrast to what archeologists want to make us believe. Be it the way the pyramids were build or just in what timeframe, the use of technologies thought to be impossible at that time or just the knowledge of things like star constellations that are not not visisble to the naked eye. In a lot of areas it seems not only archeologists but also some "secret powers" try to put a hold on discovering what was really possible thausands or maybe even millions of years ago. Things like the knowledge of distand star systems that are invisible to the naked eye might never find a suitable explanation. But what about tools and technologies used to create stonework that is hard if not impossible to create with our modern tools and technologies? I dare everyone to participate in the impossible! We know thausands of years ago milling, drilling, machining and lathe work was done but we have no real clue how it was done. At times when the rest of human kind was happy using stone tools and otherwise just hunt and gather for food some areas saw an explosion in technology. Within less than a few hundert years some builders in Egypt went from simple and explainable works to stuff impossible to do in today times. Same for India, the UK and the american continent. No hardend steel tools were ever found, no machines, no evidence on the how to, just the perfect work. Here is the challenge I propose: Come up with: 1. A way to cut or drill granite and harder rocks without modern tools or tech and still do it faster and more accurate. 2. A way to match hard rocks to each other with a precision down to less than a mm - as shown in many ancient buildings preferably on a big scale. 3. A way to create delicate carvings in hard rocks, things like hollow heads less than 5cm in size or cravings with spaces of less than 3mm wide and several cm deep - as shown in many India sculptures. 4. A way to build a lathe capable or turning several tons of steel with an accuracy better than half a mm and without electrical or combustion engines. 5. A feasable way to transport and accurately position several tons of stone - again without electricity or combustion engines. 6. A way to create sculptures with an accuracy shown by the ancient Egyptian ones, meaning perfection... 7. .... I could go on but I guess you get the picture ;) The solutions could be as simple as using sound and vibration or as complicated as finding a way to create tools hard and durable enough to proove the archeologists are right after all. And before you cry out that it is impossible: Consider the evidence! We know it was done but we don't know how, so let's show the world how we at Instructables solve the problems noone can explain ;) I can't offer any real contest, prices or such but maybe someone is reading this and willing to provide the base and soem prices?

Posted by Downunder35m 7 months ago

International zero-emmission motorsports

The world's first international hydrogen-powered motorsport race was held in Rotterdam this weekend.Dubbed the Formula Zero championship, the contest pitted teams from five countries against each other in a zero-emissions go-kart race.Each team's entry was powered by a commercial fuel cell that produces electricity from hydrogen. It may be small-scale, with only six teams entering go-kart sized vehicles, but Formula Zero is an officially-recognised motorsport, with plans for scaling up to Formula Three and the Formula One style and speeds."In 10 years if the motorsport industry as a whole hasn't engaged in zero or low emission principles, it probably won't be around," said Greg Offer, who headed up the Imperial College London team. "Teams that embrace this new technology early on will succeed, and those that don't will fall by the wayside."Racing excitement won't suffer, though; Dr. Offer says that fuel-cell powered vehicles don't represent a compromise in performance over traditional petrol-fuelled engines.'"With a combustion engine, you have to reach three or four thousand revs to get your peak power," he says. "With an electric vehicle, it's all there from standing, and they're more efficient." The next races are planned for the US in March 2009. Plenty of time to get your own entry built.Imperial TeamFormula Zero homepageBBC news article

Posted by Kiteman 9 years ago

Engineering Fellowship

Re:char seeks an entrepreneurial engineer ready to change the world. You'll be working with our 5-person team, operating out of a shipping container workshop of our own (evolving) design. A willingness to work on a start-up schedule and ability to live, full-time, in Kenya is essential. Requirements: -BS in a technical field or beyond-equivalent work experience. -A willingness and desire to spend extended periods of time working in developing countries -Experience with the following techniques: welding, 3d design, fabrication, improvisation -Interest in and familiarity with low-cost design principles for bottom of the pyramid customers Ideal candidates will also possess the following: -Experience/interest in agricultural technologies -Familiarity with biochar/charcoal production technologies -Familiarity with combustion/fuel chemistry Some of the more interesting tools you'll have 24/7 access to include: -4'x4' plasmacam cnc, with parts to build several DIY cnc setups ordered -multiple welding processes (tig, oxy, arc, spot) -extensive metalworking and woodworking equipment This fellowship will last for 6-12 months; a strong performer may then be offered a long-term, equity position **This position is paid, with a small stipend + expenses** **You should only apply if you care more about making awesome stuff than rolling in piles of money** To apply, email me ( luke@re-char.com ) the following: 1. Your resume 2. An explanation of why you want this job 3. 1 picture each and a 1-sentence description of the 3 things you've built of which you are most proud 4. A description of one thing you'd want to build in the shipping container shop and sell to customers in developing countries -Luke  

Posted by liseman 6 years ago

Toy company hired to arm US military

A gun that fires variable speed bullets and which can be set to kill, wound or just inflict a bruise is being built by a US toy manufacturer. The weapon is based on technology used to propel toy rockets.Lund and Company Invention, a toy design studio based near Chicago, makes toy rockets that are powered by burning hydrogen obtained by electrolysing water. Now the company is being funded by the US army to adapt the technology to fire bullets instead.Bruce Lund, the company's CEO, says the gun works by mixing a liquid or gaseous fuel with air in a combustion chamber behind the bullet. This determines the explosive capability of the propellant and consequently the velocity of the bullet as it leaves the gun. "Projectile velocity varies from non-lethal at 10 metres, to lethal at 100 metres or more, as desired," says Lund.The existing VWS design is a .50 calibre (12.7 mm) rifle weapon, but Lund says the technology can be scaled to any size, "handgun to Howitzer".Experts warn that fatal mistakes could be made in stressful situations, with angry soldiers turning the dial up on mobs, or forgetting to turn it up when confronted by a situation that requires a lethal response.Me, I think we're more likely to find all the secret Star Trek fans crawling out of the military woodwork, cries of set weapons to "stun", Number One echoing across the training grounds...As an aside, Lund are the people behind Tickle Me Elmo as well, which makes images of armies of armed Elmos marching towards a mob; Hee hee hee, this will tickle, hee hee hee!Article in New Scientist

Posted by Kiteman 10 years ago

So Excited!

Hey Instructabrarians!  Guess what?  After literally asking and asking and asking for so long now, they've finally agreed and I've finally got my summer dream job.  That's right, starting tomorrow  I get to work as an intern at Instructables, the #1 most awesome show and tell on the net!  This is so cool, and if it wasn't that I need to pace myself for DIY PIXAR at Maker Faire 2011, I might spontaneously combust at any second!  I've been a gigantic fan of this website for more than 4 years now and this is quite literally a dream come true for me.  Not only do I get to work at Instructables but I also get to meet the amazing founders of this awesome website!  Not to mention being able to commute to San Francisco on a daily basis!  This is Awesome and I'm so excited! Anyway, I will be keeping a photo diary for anyone who's interested (as well as updating my personal Flickr page) with weekly activities with the company on my new Nintendo 3DS.  So if anyone's got an .mpo viewer you might be able to see what Instructables is like in more than two dimensions! Well, got to go to bed, lots of commuting to be done tomorrow.  Just thank you to all of the great Instructables employees and to anyone who was nice enough to enjoy the random builds I've created on Instructables. -M.E. PS sorry if it sounds like I'm being overly arrongant about this.  It's just that for people who know me know that this sort of thing never happens for me, so I'm just going to enjoy it while I can.

Posted by SHIFT! 7 years ago

H and O burning car

The other day a friend and i were disscusing the possibility of riging an old vw beetle engine to run on hydrogen and oxyen separated by electrolosis immediatly befor combustion. heres what weve come up with so far. 1: run a second alternator off of the engine and directly to the gas tank which would be full of water (this would also contain some sugar or some form of electorlite to aid in the conductivity) as you would be burning the H and using the O as you oxidizer it would not be nessesary to worry about which gas is which u would only need one line this line would run to a valve of some sort limiting the flow of the two gasses the carb would then be removed as u are putting O into ur engine so there is no longer any need for it. the line would then be run to the fuel intake where said amount of gas is released (determined by the valve) no here is where we run into what we think might be a problem would the pressure of compression return the gasses to their original state; water? if not then the engine should then run at this point with increased horse power as of the explosive properties of these gasses. (note this is in a nutshell nothing is ever this easy if it was everybody would be doing this) of course as any responsible scientist would do i will tes this on my dads lawnmower first. not really but i do have a test engine my next project is to see if i can get an old snow blower engine to run on black powder if anybody has any ideas on that as well let me know as it is tricky because an engine requires oil but black powder igites dry that is why im going with a 2 cycle so i can try ro run it dry for like 3 seconds and if it works try to figure out how to adapt it to one with oil an maybe eventually my car how cool would that be. it would be like driving a machine gun. not to mention the increased horse power and torque.

Posted by buildingteen 11 years ago

Fireball Bomb that works like an A bomb

This is an improved version of lemonie's Instructable Big explosion, bang, fireball, so hoorah to him for it. But any way, my idea is that I wanted to control the exact moment it went off, so this brought me to my first idea, just put black powder and a fuse in the lid of a butane can. Well this didn't work, I just got a jet of flame, plenty cool, but no fireball or musroom cloud. I realized I lacked the essential ingrediants of compression and rapid combustion. So I made this. It's literally a firing mortar for the can, the idea is a non-explosive shell (a coffee can filled with cement with a large bean can set inside to make an orofice) filled with an explosive, with the can of butane in the middle, and a cement stepping stone on top. The idea is that the explosive, when detonated, implodes the can, thus pressurizing it, then ignites the butane, thus decompressing it, A.K.A BOOM. The stepping stone by this point would have come of, thus allowing the expanding hot gasses to disperse. For saftey, the entire contraption would be put in hole in the ground, with no green grass growing all around. The reason I haven't tested it is that I had a very close shave with the cops for the butane can incendierary grenade. Disclaimer, I am not liable for what you do with this information, nor am I responsable for any damage to person or property, in other words, it's your problem if you kill your self. If you haven't yet noticed why this works like an A bomb, what in tarnation are you doing on this site? But, for credebility, I'll say. The main method of detonating a fission weapon is the implosion method. Prior to detonation a nuclear weapon consists of one or more pieces of weapon-grade fissionable material which are subcritical in configuration.The implosion method is when one sphere of material is compressed (through an explosion) to make it supercritical, which leads to a chain reaction, which results in the destruction of the atom, leading too duh, a big explosion.

Posted by KentsOkay 11 years ago

A Moral Quandry About Posting - Advice Sought

Hi all, I'm having a bit of a dilemma regarding an Instructable for April Fool's Day. I was considering posting an idea I had for pulling the classic schoolboy Flaming-Bag-Of-Poo-On-The-Doorstep prank, only at great distances. It's a thought I had several years ago when a colleague was irritating me, and I thought "I'd really like to leave a flaming bag of poo on his porch. Too bad he lives 2000 miles away." Obviously, this is not something that I would actually do. It's intended as an amusing article about the theory of the thing, not something to make in real life and use. Mailing combustible materials is illegal and dangerous, potentially lethal, prosecutable under terror laws, and just generally a bad idea all 'round. Also, the mechanism of the thing could be easily repurposed to initiate a much more dangerous payload than a paper bag full of poo. Honestly, the device is pretty much a mail bomb with a joke payload. My major concerns are 1) there are people out there who would be dumb enough to build it and prank someone, thinking they could do it safely; 2) there are people out there who are malicious enough to build it and use it for intentionally destructive purposes; 3) The mere presence of the article on the site could potentially attract government scrutiny, and if someone actually were to get injured by such a device built from plans found on this site.... On the other hand, Kiteman's 0th. I have considered redesigning it so that the payload involves something innocuous, like a spring-loaded confetti launcher or a recorded message, but the humor of the thing really depends upon the absurdity of mailing someone a flaming bag of poo. Mailing someone a sound bite that says "YOU SUCK" just doesn't have the same impact. Plus, it costs more to make. Poo is free. Anyway, what do my esteemed colleagues think? Am I being overly cautious, or am I right in just shelving the whole thing?

Posted by RavingMadStudios 8 years ago

No patent on this one.

I have an idea. It could be a good one, and it could be a useful one. It could even be a money-spinning one, but I want to spread it instead of earn from it.What I'm thinking of was inspried by potato cannons:Imagine a combustion chamber of reasonable size, say a gallon volume. Cylindrical, it is domed at one end t withstand internal pressure, but the other end tapers to a narrow outlet.The idea is that an explosive mixture in the chamber (anything handy, but gasoline/air, ethanol/air and butane/air are the most likely) is ignited by a spark, just like a potato cannon. There is no ammunition, though.The tapered pipe (I hope) concentrates the blast to release a "bullet" of rapidly-moving gases.The whole cannon points down at the ground, the muzzle only a few inches from the ground. The detonation is triggered via a long cable (metres long). The "gas bullet" hits the ground with a large enough force to simulate the step of a human or animal, or the passing of a tyre. This triggers the landmine left months ago under the soil.My idea is, in effect, a low-tech device, capable of being built and repaired by semi-skilled locals, from scavanged materials, in war-torn areas. With a bit of training, a small team could use one to safely pound a mine-field hard enough to trigger the mines and make the area safe to live in. The cannon would be damaged by explosions, but not so badly that it would need repaired after every use, and it could be easily fixed with scrap from the nearest wrecked landrover.Would this work? Or would they need solid ammunition, say lumps of timber or rocks wrapped in rags to make a seal? That would need a staight (not tapered) barrel, but it's the same idea.I don't have the space or equipment to make one myself, and land-mine charities won't tell me how much force is required to trigger a mine, but most of you reading this are in the US, and it seems you have an easier time finding this kind of thing out.Run with the idea, chaps. Build one if you can, and ship it to somebody who needs it, or come up with better plans than my rough idea, and post them to those who need them.

Posted by Kiteman 11 years ago

No patent on this one.

I have an idea. It could be a good one, and it could be a useful one. It could even be a money-spinning one, but I want to spread it instead of earn from it.What I'm thinking of was inspried by potato cannons:Imagine a combustion chamber of reasonable size, say a gallon volume. Cylindrical, it is domed at one end t withstand internal pressure, but the other end tapers to a narrow outlet.The idea is that an explosive mixture in the chamber (anything handy, but gasoline/air, ethanol/air and butane/air are the most likely) is ignited by a spark, just like a potato cannon. There is no ammunition, though.The tapered pipe (I hope) concentrates the blast to release a "bullet" of rapidly-moving gases.The whole cannon points down at the ground, the muzzle only a few inches from the ground. The detonation is triggered via a long cable (metres long). The "gas bullet" hits the ground with a large enough force to simulate the step of a human or animal, or the passing of a tyre. This triggers the landmine left months ago under the soil.My idea is, in effect, a low-tech device, capable of being built and repaired by semi-skilled locals, from scavanged materials, in war-torn areas. With a bit of training, a small team could use one to safely pound a mine-field hard enough to trigger the mines and make the area safe to live in. The cannon would be damaged by explosions, but not so badly that it would need repaired after every use, and it could be easily fixed with scrap from the nearest wrecked landrover.Would this work? Or would they need solid ammunition, say lumps of timber or rocks wrapped in rags to make a seal? That would need a staight (not tapered) barrel, but it's the same idea.I don't have the space or equipment to make one myself, and land-mine charities won't tell me how much force is required to trigger a mine, but most of you reading this are in the US, and it seems you have an easier time finding this kind of thing out.Run with the idea, chaps. Build one if you can, and ship it to somebody who needs it, or come up with better plans than my rough idea, and post them to those who need them.

Posted by Kiteman 11 years ago


This is not a scan of the original book, but the original book converted to text with OCR, and strictly proof read with QC controls. Thus the charts, formulas can be copied and pasted into something else.  www.gutenberg.org/etext/27257   ELECTRICITY FOR THE FARM LIGHT, HEAT AND POWER BY INEXPENSIVE METHODS FROM THE WATER WHEEL OR FARM ENGINE BY FREDERICK IRVING ANDERSON AUTHOR OF "THE FARMER OF TO-MORROW," ETC., ETC. New York THE MACMILLAN COMPANY 1915   PREFACE This book is designed primarily to give the farmer a practical working knowledge of electricity for use a slight, heat, and power on the farm. The electric generator, the dynamo, is explained in detail; and there are chapters on electric transmission and house-wiring, by which the farm mechanic is enabled to install his own plant without the aid and expense of an expert.    With modern appliances, within the means of the average farmer, the generation of electricity, with its unique   conveniences,   becomes   automatic,   provided   some   dependable   source   of   power   is   to   be had—such as a water wheel, gasoline (or other form of internal combustion) engine, or the ordinary windmill. The water wheel is the ideal prime mover for the dynamo in isolated plants. Since water-power is running to waste on tens of   thousands of our   farms throughout   the country,   several chapters are devoted to this phase of the subject: these include descriptions and working diagrams of weirs and other simple devices for measuring the flow of streams; there are tables and formulas by which any one, with a knowledge of simple arithmetic, may determine the power to be had from falling water under given conditions; and in addition, there are diagrams showing in general the method of construction of dams, bulkheads,   races, flumes, etc.,   from materials usually to be found on a farm. The tiny unconsidered brook that waters the farm pasture frequently possesses power enough to supply the farmstead with clean,   cool,   safe   light   in place of   the dangerous,   inconvenient oil   lamp;   a   small   stream capable of developing from twenty-five to fifty horsepower will supply a farmer (at practically no expense beyond the original cost of installation) not only with light, but with power for even the heavier farm operations, as threshing; and in addition will do the washing, ironing, and cooking, and at the same time keep the house warm in the coldest weather. Less than one horsepower of energy will light the farmstead; less than five horsepower of energy will provide light and small power, and take the drudgery out of the kitchen.   For those not fortunate enough to possess water-power which can be developed, there are chapters on the use of the farm gasoline engine and windmill,   in connection with the modern storage battery, as sources of electric current.   www.gutenberg.org/etext/27257

Posted by Lateral Thinker 8 years ago

Free Hardwood, Dragon Eggs, Green Explosions...

Sign-up for our newsletter here. Jan. 24, 2008 Welcome back! This week we announced the Get the LED Out! Speed Challenge. Make an awesome Instructable featuring LEDs and win a TV-B-Gone kit! The Homemade Holidays winners have been announced. See who won here! Which of our 14 great finalists should win the $15K VersaLaser? Help decide! Check out these cool instructables! Make a gorgeous Dragon's Egg Turn a regular egg into a fantastic looking dragon's egg in a few minutes with a bit of hot melt glue gun glue and some paint. posted by KaptinScarlet on Jan 23, 2008 Encode data in 2D on your T-shirts, business cards and stickers ! Use QR code, a 2D bar code, to encode fair amount of data that can be read with cell phones! posted by 5Volt on Jan 17, 2007 How to Start Fire with Water! Start a very cool green combustion with just a few drops of water!posted by pudi.dk on Jan 17, 2008 Carrot Caviar Jump on board the Molecular Gastronomy train by making up some carrot caviar in your own kitchen. posted by mzed on Jan 18, 2008 Awesome led cube You never know when you might need a glowing cube to convince people you are from the future. posted by AlexTheGreat on Jan 23, 2008 Speed Challenge! Vote on the finalist pages! Book shelf? ...what book shelf? Here is a method of displaying the artistic covers of a book when space on a table or shelf is not available for displaying it. posted by watermelon on Jan 20, 2008 Make your own Roll-Up Keyboard Have you ever wanted one of those pricey roll up keyboard but didn't want to spend the money? Here is a quick and dirty way to make your own. posted by Auger+Duval on Jan 22, 2008 How to Remove A Fishing Hook Using Fishing line If you get a fishing hook stuck in your finger, salvation is a quick tug of fishing line away from you. posted by back-cast on Jan 23, 2008 Build your own computer Why buy a computer from a manufacturer like Dell or Gateway, when you could build a more powerful computer for less money? posted by bmlbytes on Jan 19, 2008 How to Get Cheap or Free Hardwood Lumber Here's how to buy new lumber in bundles for less than firewood. This seems to work best for hardwoods, cabinetmaker type stuff. posted by TimAnderson on Jan 21, 2008 Show us your yarn! There's still time to enter pictures of your yarn projects in the Lion Brand Yarn Challenge!! Here are some of the 222 projects already entered- check them out, talk to the crafters, and get inspired! Hats Afghan Shawl Ornaments Goldfish   Now go make something awesome, and I'll see you next week! - Eric

Posted by fungus amungus 10 years ago