DIY Challenge Portable Filtered Ventilation System

Hello inventors and creative minds. I'm an airbrush enthusiast and I'm looking for an inexpensive way to build a portable ventilation system. I'm curious if anyone has built something that would work by using cheap home filters. Please send any ideas and suggestions

Topic by lancruz 11 years ago  |  last reply 1 year ago

Forge Ventilation help?

Hi all, Due to location & noise, in order to continue using my coke forge and anvil I must move indoors, into the shed to be precise. I know it sounds a bit crazy attempting to run a coke forge in quite a confined (10-14 m3), fairly air tight space, but I have researched thoroughly the dangers and safe working levels etc and have the use of a fully calibrated gas analyser designed to measure CO in real time, so safe operation will be measured to the nearest ppm :)  The fans gumf claims 1060 m3/hr which I guess is best case, flat out @ 50hz and obviously does not allow for any other mechanical losses, but even a conservative estimate must give around 45 air changes an hour, which to me sounds like more than adequate clean air coming in to displace combustion gasses. But I guess the first question is will the chimney work as a passive exhaust,  to maintain positive pressure behind the chimney (which will be 12") I will have only a forced air inlet and no other vents other than the chimney itself, trouble is I can see it both working and not working: 1. Inside air will be forced up the chimney as that is the only way out = more ventilation 2.Inside air will cool the air in the chimney reducing the natural draw =  less ventilation And even if the CO issue is overcome will heat just ruin my plans anyway?

Question by Squibo 2 years ago  |  last reply 2 years ago

Ventilation In A Small Forge?

Hi all, Im trying to build a small forge in my small tin shed (9'x11') , due to noise and residential location everything must be inside and the sound proofing makes it pretty airtight, therefore I'm relying 110% on good ventilation design to avoid CO poisoning. The coke forge is in and flued using the side sucker design and 12" insulated duct, so far this works well with the addition of incoming air from the rear of the shop and I have been able to use reasonable quality test equipment to measure CO at acceptable levels (only under ideal conditions, further testing to follow). I have also thought of adding a propane forge (only one forge be used at any one time) but worry about the increased levels of CO produced, I have toyed with the idea of a hood which encompasses the mouth of the forge which would be ducted at 45 degrees into the main stack for the other forge (I would like to minimise roof penetrations if possible) I have made a rough sketch (in paint sorry) to demonstrate what I mean, do you think a fanned draught inducer is necessary/useful, we don't use them much in the UK so im not sure how much draught they induce :),  is the flue angle/ bends going to reduce efficiency greatly and would adding a fan to the intake to change to positive pressure internally make that much difference?  Any other ventilation advise would be greatly appreciated, including anything to help understand the maths required to calculate correct air volumes etc, I'm fairly serious about doing this correctly, understand in some detail the dangers of CO exposure and would not concider continuing without thorough testing for safety. Thanks in advance, drawing not even slightly to scale :)

Question by Squibo 2 years ago  |  last reply 2 years ago

Solar Chimney anyone?

Hi, I have seen so many solar instructables, but none on Solar Chimney. I am not a good DIYer so I have no idea which materials to use and how. I don't know If I myself will do this or not, but I thought the great DIYers on this site might find it a great funand usefull project. So I post it here in the forum. Happy DIYing! :-)

Topic by kamathln 9 years ago  |  last reply 8 years ago


I know I've seen this.  Really, i shouldn't have to re-invent the wheel. I have seen this online, but now I can find it. A bulb built into the heel of the shoe pumps air through the toe area. Can anyone else find this?  I know I've seen it.

Topic by Toga_Dan 5 years ago  |  last reply 5 years ago

Hamster-powered ventilation system?

I'm in the process of expanding my hamsters cages and because of the design, I'm not able to leave the top open to allow better air circulation like I'd prefer. The cage is made out of plexi glass with ventilation holes on both sides and I found a post somewhere about using a computer fan behind one end of the cage to increase air flow. Is there any way to wire it so it turns on when the hamster runs on the wheel/at a random time?

Topic by SkiddieN 3 years ago  |  last reply 3 years ago

I'm looking for a small inline vent (1-1.5") to ventilate a small box

I found only 4" and bigger vents (such as:            ;_prod_id=59,7_73&action;=product              I need to place equipment which heats up quickly and I want to blow the air outside. The hole I can drill is 1"-1.5". Any help will be greatly appreciated.

Question by nilovich 7 years ago  |  last reply 7 years ago

Thoughts for a fan for venting a homemade 3D printer enclosure?

Hello all, I'm in the early stages of building my own enclosure for my 3D printer. I'm going the route of building it using Ikea Lack tables. I'd very much like to put in a fan to vent the fumes from printing out the window via a hose. Originally, I was going to use a USB fan, but I'm starting to wonder if that will move enough air to make any difference. I was going to go with USB because I have no electrical work skills. I'm curious if any of you have thoughts, or have already come up with solutions for this. I'd be interested to hear any suggestions or advice anyone has. Thanks!

Topic by JesterPoet 1 year ago  |  last reply 1 year ago

How to prevent gasoline fumes from seeping into my house/garage from a neightbours garage?

Hi all, Back again with another issue regarding the money pit. I live in a townhouse and my neighbours have two motorcycles in their garage. They leak gas and I am guessing pretty badly because I cam smell it in my home. When their garage hasn't been opened in awhile it's fine, but when it opens, I am supposing the pressure builds up and BLAMO It comes through the vents in the house or around the vents in the house. My garage even smells strong of gasoline and I have nothing in it that uses gas. Is there anything I can do? Besides to obvious and talk to the neighbours, and the condo corp, two things I have already done. It wasn't bad in the summer because they were in and out and the windows were open so there was less pressure, however, when I arrived home last night it smelled like a flippin gas station in there! I am waiting to hear from the condo corp, trying to be proactive because clearly this issue isn't one they are tending to with immediacy

Question by sherie 7 years ago  |  last reply 7 years ago

diy fume extractor carbon based vs diy ventilation system for soldering

hi i am curios what you peeps think what is better to make for soldering a fume extractor carbon based or a ventilation system because i am getting kinda sick of always blowing away the smoke from soldering thou i am used to smoke since i smoke myself (and yes i also smoke the herbs) <- to remove possible coming jokes -_- but i have a hard time choosing what to build so i let you guys help me choose hehe ^^ also i live in the netherlands in-case of resources to make it (for carbon filters) because i do not know the dutch and eu laws about such things i look forward to your replies ^^ greets angellicktrooper aka naku

Topic by angellicktrooper 7 years ago  |  last reply 7 years ago

heat isolation, how to keep heat away from electrical cords? Answered

 hi, we're building our own heating system. we're using ventilation tubes(often used on dryers) to distribute hot air through the shed, but it needs to get pretty close to an electrical cord(+/-1 inch) and the tube gets pretty hot(at least 200 degrees Fahrenheit). which is a bit of a problem, the electrical cor is the type you'd burry in the ground, and it looks like it shouldn't melt too fast, but we still ant to isolate it, any hints/tips on what kind of material to use would be appreciated... 

Question by lieuwe 8 years ago  |  last reply 8 years ago

I need an air moisture meter and possibly a thermometer in one.

Good day,I am trying to find a moisture and temperature meter (possibly in one). It will be a used in a beehive. During the winter the bees cluster together to keep warm. Warm air rises up and gets in contact with the cold ceiling. It cools off and releases moisture. The water then starts dripping down and creates a mess of wet bees and mold. Opening the hive during the winter is not recommended till temperatures get back over 40F. Proper ventilation is possible to achieve through the design of the beehive but i would like to know the level of moisture and temperature if i was to just walk next to the beehive. I have seen a few instructibles about moisture meters but they are geared more toward soil moisture. I need it for the air. The system could be powered by a rechargeable battery and a solar panel - i can take care of that myself. Thanks.

Topic by PavelA12 2 months ago  |  last reply 7 weeks ago

Can I produce electricity with ventilator motor?

Question by psicloone 9 years ago  |  last reply 9 years ago

How to make a no smell, no flies, worm compost bin?

I want to make an indoor compost bin because it's too cold for the worms in the winter. My dad says it'll smell way too much and actually i'm worried about the flies. I already made (and used) a worm compost bin last year and it was smelly so it was sent into the garage and all of them died in the winter. So is there a way to make a no smell, no flies worm compost bin? BTW the compost bin will be put in my basement that has no ventilation.

Question by Pizzapie500 8 years ago  |  last reply 8 years ago

how would I heat and ventilate a single slice of bacon oven?

I am building a tiny bacon oven, and I want to have it cook in 10 minutes as if it were in the oven.  But the real puropse is to get the great bacon smell out of the bacon oven, while maintaining the heat to cook the bacon at 350F.  Any good ideas?

Question by rocklobster21 6 years ago  |  last reply 6 years ago

Smoking machine Specs, for hot smoky girl interactive sculpture ? (and ventilator)

Hi I want a smoke machine that pumps low cubic meters or that imitates this picture. It`s for a huge 123dmaker face sculpture Can i get this sort of effect? And can I get a ventilator that "inhales" the smoke  and makes it disapear?;=vg%2bScmVq&id;=153762409D14BE46E36C32C4027CD224EF895C32&thid;;=inhaling+smoke+girl&simid;=608020036307845272&selectedIndex;=2&ajaxhist;=0

Topic by DIAGONALLIS 1 year ago  |  last reply 1 year ago


I searched the engine for turbines and ventilators, cos in summer it's kinda hot here. And today my room-mate used a tool-box to keep the kitchen's door open, so that we possibly get sum air/wind coming through the kitchen's window and the corridor to cool the rooms of each one of us, but i guess i need an idea of a ventilator. Say, not a usual one like my ceiling ventilator that hardly compensates my comps' heat, but a kinda turbine that i can build and hook onto our kitchen's window. If i had more of them, i probably could stream the wind systematically through all rooms. (what i think about is a litle bit like water-pumps); air in these times is not moving, but you need air's movement to cool, so i have to get the air moving and a "kit" that you can build, eventually amplify to get a "bigger one" of the ventilators (for the main stream from the kitchen). I wanna stream my flat with air ! My room.mate went in a min ago and he said, i should try it in my room - sure, but i got my ceiling ventilator and that one sucks the air from abnove to push it downwards, but i keeps stayin the same air, cos it dun move it from outside the house to inside and out again. Umm, sry, i've drunk a lil bit and it was really a weird day today, so sorry, if it sounds weird. I just wanna get rid of the heat in here and wanna do my part as crafter against the condition as it is. So, if you got any idea, would be great...

Topic by Luziviech 7 years ago

Hi there, i saw here such vents for bike made with lego, i cannot find it anymore and i donnot know how it can be called

Hi there, i saw here such vents for bike made with lego, i cannot find it anymore! maybe. i dunno how it can be called. ventiles? does anyone know? cannot find it anymore! maybe. i dunno how it can be called. ventiles? does anyone know?

Question by kamilarr 9 years ago  |  last reply 9 years ago

Heat sensor?

I need a heat sensing circuit that detects, if my server blows out warm air to switch on forced ventilation. This module should work as a stand-alone module without any connection to the server.

Question by Bernhard 52 7 years ago  |  last reply 7 years ago

How do I secure my double-hung windows?

I want to secure the bottom sash of my double-hung windows so I can lower the top sash for ventilation.

Question by TschNJ 9 years ago  |  last reply 8 years ago

How can I get a ventilator to suck air from a smoke machine and trap the smoke?

 Hi, I`m making a 2meter laser etched cardboard dinamic sculpture face of a girl inhaling smoke with a smoke machine on the mouth, and I want to imitate this inhaling effect!:  2 Q> what can I use to get the "nose" to absorb the smoke? :  {"A fan or blower can be used to suck the vapor in. Then if you have a long enough duct or large enough chamber let the vapor evaporate/dissipate. You can also run it through a furnace filter to help condense the water vapor faster. "} I got the fog machine 2.1 Q> -I am looking for a strong fan or blower that sucks the air in like a nose (and some machine that traps the smoke particles coming from the smoke machine), but What am I looking for more specifically?  

Topic by DIAGONALLIS 1 year ago  |  last reply 1 year ago

Squirrel cage wiring??

I see a lot of squirrel cage fans with internal motors at the scrap yard. They are from discarded air conditioners, but could be used for room ventilation, etc. Does anyone know the wiring scheme or have a wiring diagram. There is usually a capacitor involved.

Question by vectorges 9 years ago  |  last reply 9 years ago

composter made of igloo drink cooler

I had this idea for a cheap, easy composter, using an igloo type drink cooler. (considering purchase for this purpose) I think it just needs ventilation and straps to hold on the lid when mixing. (have these already) Anything else needed?

Topic by pinkrenegades 2 years ago  |  last reply 2 years ago

Is soldering a health risk?

I was just wondering how (aside from being clumsy and burning yourself) soldering can be a health risk. I would suppose the fumes would be bad for you, and is there anything else? And is it safe to solder in an average room in a house, or should I do it outside for better ventilation? 

Question by diggingeagle 8 years ago  |  last reply 5 years ago

Is a Wooden Enclosure for Electronics a Good Idea? Answered

I am in the process of converting my ATX power supply into a bench power supply. My PSU's standard case is made from 1mm steel with various ventilation holes, there is also a 120*120mm fan.  However, the circuit board is strangely positioned within the case and there isn't enough space for what I want to add.   I would like to take all of the electronics and rehouse them in a home-made wooden case. My question is; Is this a sensible thing to do? I plan to use 5mm pine stripwood to remake the box, but slightly bigger and better arranged. I would still fit the fan and drill plenty of ventilation holes.  Do I need to take any extra precautions if using wood, or is it just a really bad idea. Thanks in advance. 

Question by R055_28 9 years ago  |  last reply 9 years ago

Do you have home repair questions?

I'm a Master Property Inspector and retired General Contractor. I thought I would start this topic to answer questions anyone might have about owning/maintaining a home. As a general contractor, I'm a licensed electrical, plumbing and HVAC (heating, ventilation & air conditioning)contractor so ask away.

Topic by InspectorD 12 years ago

Solar panel design: Optimal thickness and air-tight or vented? Answered

Is it better to minimize airspace inside a home made solar panel, and should the panel be air-tight, or have ventilation holes? I'm trying 1/4" depth from the cells to the Lexan cover. It will be used in a climate that ranges from +35C in summer to -35C in winter.

Question by 9 years ago  |  last reply 9 years ago

If I bought a rechargeable 4R25 Battery, How many solar cells would I need to keep it charged? ?

I'm building a dog house which the base will be 9-10inches underground, which helps with the build up cool dead air at the base to help keep the house cool. I want to use four(4) computer fans to help ventilate the house from the base where the dead air resides. Near the roof of the dog house will be ventilation holes for the dog, in fact I may use another fan to vent out the hot air. I was hoping that I could use some silicone cells to keep the battery charged, but not sure how many I would need to keep it charged. if it requires too many I may stick with recharging the battery in the house or using a 9v battery for each fan and swapping it out here and there.

Question by bprins 7 years ago  |  last reply 7 years ago

Can I etch a PCB in the winter...? Answered

I want to etch a PCB, but it is rather cold where I live. I had settled on the HCl/Peroxide mix, but I could use something else if need be. I wouldn't be worried about it, except I get the impression it's a good idea to carry out the reaction outside, where it is cold right now. If working outside in the cold is a no-go, is there any etchant that is "safe" (I understand that safety is relative, I mean along the lines not immediately gassing me) to use indoors with ventilation? If so, how much ventilation is needed? Are we talking an open window, or an industrial fume extractor? Also, I wasn't sure which category and channel would be the best, so if a mod or somebody sees this and has a better classification, go ahead and change it. Sorry for making this such a long question; I'd just like to be able to use my circuit board before I die ;). Thanks, dedgerton

Question by dedgerton 7 years ago  |  last reply 7 years ago

Small fan hooked up to a thermosta to cool a computer in vented furniture

I have a tower compute that I have put in a enclosed desk that I cut several vent holes but want to instal a fan as backup with a thermostat to insure proper ventilation. I was thinking buying a small desk fan that fit the space connected to a thermostat inside the enclosed space where the computer sits. 

Question by Richard Breffeilh 2 years ago  |  last reply 2 years ago

Soldering indoors? Answered

I'm a grade-A electronics noob, and I'm just starting my first project soon. I'd be doing it now if not for the fact that I'm doing it in an upstairs bedroom and if I know anything about soldering it's that you're supposed to do it in a well-ventilated area. Should I get a fume extractor, or is that more of a luxury? Is there a cheaper alternative? Would it be a problem that there's another house a couple of feet from the window I'll be soldering in front of? 

Question by Numbuh1Nerd 2 years ago  |  last reply 2 years ago

How to increase relative humidity and temperature in a box ? Answered

Hey,I need to increase the relative humidity of a slightly ventilated box up to 60-90% and to set temperature to 20°c (the outside should always be colder than 20°c). The box is closed (only two holes for the fans) and its dimensions are 1000*600*300 mm³. I only need to know which "hardware" to use. They will be switched on and off by a relay which is controlled by a humidity/temp sensor.Thanks for your answers :)Best regards,Quentin

Question by QuentinP16 1 year ago  |  last reply 1 year ago

Sealing permanent marker on glass besides a oven?

Can NOT use a oven as our oven is questionable with it's temperature & I live in a apartment that has very little cross-ventilation. So anything that gives off a smell would be hard. (The place stunk up from spray painted items that I had to stick them to dry in my car. Would top coat nail polish or sealer (wax) work?

Question by Detetiv 1 year ago  |  last reply 1 year ago

Hacking the power windows on my Sebring

Hi, I'd like some help tweaking the power windows of my 2005 Sebring.  I'd like to be able to operate the windows with the key in the "accessory" position. I'd also like some guidance on how I could install a switch that would let me open all 4 windows an inch or so, to allow ventilation on hot days.  I can figure out the switch installation & wiring, I'm more interested in ways that I can hace the window motors to stop after a certain depth.

Topic by xkcd386 8 years ago

add motherboard stand-offs to an RS enclosure?

I need to connect the board from a PC ATX power supply to a Plastic Radio Shack project enclosure. as a part of my ventilation / grounding scheme I've got the power supply on standard brass motherboard stand-offs. I don't want to connect any hardware through the case, for insulation purposes. I need a good way to hold the stand-offs (and by extension the power supply) sturdily in place... preferably with bits I can get locally (hardware store or RS)... Any Ideas?

Topic by gschoppe 11 years ago  |  last reply 11 years ago

Can anyone guide me through making an Inverter to control the speed of a 1HP single (or 3) phase induction motor?

I sometimes come across induction motors at a local tip that work but are of fixed speed, and wish I could use them better.  I have one at the moment which I plan to build into a humidity  dependent (with user override for occasional purge venting) ventilation system.  So I want to be able to control the speed of an induction motor which currently runs at a fixed speed, off single phase 240volts.  I wonder if anyone has experience they might share in putting together an inverter capable of doing this? Many thanks Bongo. 

Question by bongodrummer 9 years ago  |  last reply 9 years ago

i need some help with My science fair project ?

I picked my sci project and have been working on it for 3 weeks now my subject is what habitat does basil grow the best in? my variables are 1 controll plant put in sunny area with regular amount of water 2 poluted water plant 3 LED light source and good ventilation plant 4 encanced water plant with artificial food in a dark box with a crack of light and my partner Melrose is doing what type of water do plants grow the best in types of water she is testing Tap distilled pure spring

Question by albylovesscience 9 years ago  |  last reply 9 years ago

How to make a Dead Space helmet/costume?

Hi, I want to make the costume from the video game Dead Space. I want it to be durable, and good quality, but not too expensive. I would like to ask for some hints, as to what materials to use. What would be the best and the easiest material. Also, Im starting with the helmet, in case it will turn out to be too expensive, ill just stick with that and make the rest of the suit on another occasion. thank you for all your help ****note about the picture***** my helmet will have a blue film instead of the mesh and will light up like in the game. also, i plan on installing two pc fans into it, for ventilation.

Question by 10 years ago  |  last reply 1 year ago

I have a 55 gal metal drum that I want to burn in. Does anyone know how to set this up?

I have a 55 gal metal drum that I want to burn in.  Does anyone know how to set this up?  I think I want to bury it a little so we don't have to stand up all the time.  Someone said to set on something in the ground for ventilation.  Everyone says something but I can't find anyone that just knows how.  Thanks for your help. I want to use the drum for outdoor fun.  Bon fire type of thing with an occasional marshmellow roasting. 

Question by vcreel 9 years ago  |  last reply 9 years ago

Laundry room with no exterior walls in need of a better dryer exhaust solution! Ideas?

I have a dryer with an exhaust vent that could not possible exit my condo as it is in a stack in the very center of my unit; moreover, even with a crafty snaking of ventilation piping couldn't get it near an exterior wall.  As you can guess, when I dry my clothes the utility room turns into a sauna and all of my walls develop condensation from the hot air and water vapor the dryer is using and extracting.  Does anyone have any good ideas for how I could reduce the condensation build-up or even alleviate the problem?  I thought of making some sort of dispersal fan to cool the hot dryer air as it exits the dryer, but I am not sold on this idea.

Question by interested1 8 years ago  |  last reply 8 years ago

Safety of laser cut foamboard (fumes, etc)? Answered

So I cut some elmers 3/16" foam board today on our schools laser cutter- it gave off some nasty fumes but luckily most of it was ventilated out of the cutter. My concern is that inhaling the fumes (or the low-volume fumes i got from whatever smoke was left in the laser cutter), will be pretty bad for you. I dont know how toxic the fumes are from laser cutting foam, but my guess would be pretty bad. I also read somewhere that heating the foam up produces a lot of toxic byproducts, one of them being cyanide... Is this stuff safe to handle? I did feel a bit "foggy" afterwards, and had a slight pain in my chest, but not a lot...Thanks!

Question by astroboy907 6 years ago  |  last reply 6 years ago

Can I convert an old window into a working door for a child's playhouse made from a water tank, or use something else?

I'm building a playhouse from a cube shaped 275 gallon water tank and need to figure out how to build a working door for a small child. The tank will form the basic structure as it is going to be partially buried on one side, like a "hobbit hole" and I figured the tank would be water-proof. I'm still working out the details, and figure the door needs to be at least big enough I can reach in to remove the child easily. (The tank will be ventilated through the filling cap on the top and a dryer vent on an exposed side wall.) I plan to cut a hole in the side of the tank once I figure out how to make the door. I know this is a strange project, but it should be a lot of fun for my little hobbit this summer, and I appreciate any help I can get! Thanks!

Question by hobbit hole builder 8 years ago  |  last reply 8 years ago

Under Ground Fort

I'd like to build an under ground fort, it must be water proof. I want to have a stove in it if possible, i will have big ventilation so as not to have a build up of carbon monoxide. I have access to a wide rang of tools, I live on a farm so space isn't a problem. I did find a plan in a magazine from 1929, its rather vague and i would like more help. I can take as long on it as it long as it takes to build it right, so time isn't a problem. I don't know if i should pack the wall with stones or planks, Ideas? I want to have a good idea of how to do it before I start. It shouldn't be to expensive but that isn't really a factor. People are saying that I shouldn't build an underground fort because of the danger of it. If i didn't make a fire place in it would it be better? How about I put a trapdoor above the fire place, that way i could open it when i used the fire (Update)

Question by ChuckIorn 6 years ago  |  last reply 6 years ago

how to strip large diameter copper wire

If you have say 2 inch or better diameter copper wire to strip here is what I do. I have ben in the scrap arena for years. Buy a large handeled pair of shears that are only for copper. They will look much like a large pair of boltcutters. Cut your insulated wire into about two foot lenghts. Get a large pot, the bigger the better and heat with an out door propane burner full of water. Place the cut sticks of wire into the boiling water fro about five min. Get some insulated rubber gloves and a sharp razor knofe and you will find that the plastic insulation carves away like butter. This works on everykind of insulated wire I have come across. With lead wrapped insulated wire, get a plasma torch. It cutts easily and is so fast the plastic wire inside does not have time to catch on fire. Use plenty of ventilation to avoid breathing lead based fumes.

Topic by beserker 7 years ago  |  last reply 7 years ago

East Coast HPV Challenge - Quick Update

So yesterday started the east coast human powered vehicle challenge by ASME. Yesterday was the design portion of the event (and safety inspection/testing). So far we've seen lots of two and three wheelers -- everything from 100% upper body powered (for paraplegics) to a LWB tadpole leaning trike (wheels and all -- no banana lean there). Someone even showed up with a 75+ tooth front chain ring (it's a monster)! We had teams from all over, including two fro Venezuela. Some vehicles are fully faired, more partially. Many of man (and woman) hours invested in everything ;) First picture -- UCF (us!) - in the background is last year's model (complete with scars from several crashes). Note this year's design has rear view mirrors, ventilation and a vacu-formed windscreen :D Our ventilation is even adjustable (climate control perhaps? :P). Second and Third Picture: Leaning Trike -- also has conventional steering (no lockout mechanism though). Really cool to watch - they scored second in the "design innovation" category of the design competition. (Shameless Plug: we scored third in that category). A big deal with this leaning trike from Arkansas, the started DESIGNING in January! Believe me when I tell you - that is HUGE progress to make in such short time. On top of that -- almost all of their team members are getting married soon (their finance's must be VERY tolerant) and there's only something like 4 or 5 team members! I was really happy to see someone bring a leaning trike -- I give them a tip of my hat ;) Fourth Picture: This is what a high speed streamliner resembles -- note the landing gear (very awesome idea). They had some "knarly" crashed today involving hay bales, skidding and mulch (at the sprint event - more on that later). But, true to their safety claims -- no injuries. Fifth Picture: Probably one of my favorites at the event - Tadpole trike tandem (for people that hate each other :p). I want to test ride it (and they're cool enough to let people do that too!). I also say their frame is one of the best design wise (appears very stiff). Last Picture: Everyone listening to the official before the sprint event. Max speed (by that red streamliner I believe) at the sprint event today was 41mph (male rider) ;)

Topic by trebuchet03 11 years ago

mission of sputnik 1

Russian technology satellite. One launch, 1957.10.04. Tikhonravov's 1.4 metric ton ISZ satellite was to have been launched by the new R-7 ICBM as the Soviet Union's first satellite, during the International Geophysical Year.    But it was not ready in time, so Korolev hurriedly developed Sputnik 1 as a replacement. It became the first artificial satellite of the earth. Sputnik 1 had 1 watt of power, producing an 0.4 second duration signal on the 7 and 15 m bands. Four antennae were deployed at 35 degree angles. Power was provided by three silver-zinc batteries. Thermo-regulation was by a ventilator. The 580 mm sphere had a mass of 83 kg and was made of highly polished Aluminum AMG6T alloy 2 mm thick. It was built without drawings due to the quick time schedule. Korolev was everywhere, supervising all aspects of its construction. It functioned for 21 days.      AKA: PS-1. Gross mass: 84 kg (185 lb). First date: 1957-10-04. Number: 1 .     the word sputnik is russian word for traveller

Topic by Waren-Neutron 8 years ago  |  last reply 8 years ago

Solar "Generator"

Since I've always wanted to do something like this and I found this site, it's about to happen! I found a smaller version with what I wanted to do at Popular Science but I want to do something on a larger scale. I do have some questions though that I'm hoping someone can answer or point me in the correct direction.I'm going to describe what I'm doing with what and what I have questions with.I'm going to be buying this solar panel and charge controller kit. Sunforce Solar Panel With Charge ControllerA deep cycle 115 AMP Hour 12 V marine battery from Wal-Mart with Plastic Battery caseSalvaged wood Toy BoxMeter Question: How to meter how many amp hours I have left or how charged the battery is? What kind of meter to buy? Where? (not too expensive <20 bucks or so) how to hook it up.A 12 V accessory outlet with on off switch Question: I'm putting an inline fuse before the switch, 15A the line fuse goes on the + (positive) side correct?A 700 Watt 6.25 AMP DC to AC converter with 4 outlets connected to it. Question: can I put a breaker or fuse between the 4 outlets I'm going to be plugging into on the outside and the plug being plugged into the DC to AC converter? If so how?USB ports for charging with on off switch. Question: how do I convert the 12V to 5V in an easy way? I've seen some creative ideas on here for charging VIA salvaged USB ports but I don't want to have to hook it up to my power inverter if I don't have to. Cooling/ventilation for the entire thing. Any ideas how I might cool/vent it? Currently I'm thinking of using old computer fans and put them on both sides of the toy box and have 2 blowing and 2 blowing out. Having the fans run off of the solar panel during the day and either have a switch to change it to battery at night (if it's too warm in the house) or maybe photo sense it? Temp sensor to turn it on and off? Or a switch to turn it off completely. I'm just looking for idea's to keep the battery (and to expand to be more than one battery) cool/ventilated. If you have examples or detailed description on how to do it that'd be great. I'm not one to steal ideas so I'll credit the idea's I'm given if I use them =)I'm going to see how much I can run off of this and how long. Hopefully save some big time energy also!Thanks all!

Topic by oddie1212 11 years ago  |  last reply 8 years ago

Large Scale Mould Making - the Evolution

I'm so excited, I now have + hours of video to cut and share :)Today we:Finished the split standSet the finished plug in the stand and aligned our waterlineBondo'd stand and plug for a flange lineApplied mold release waxSprayed PVA (Poly Vinyl alcohol)Applied a polyester tooling resin with cabosil (A silica thickener) to serve as the inner mold face (outer shape/surface of final product)Applied 4 layers of chopped fiber with polyester resin (took about an hour and we're still a tad bit high - even with good ventilation)Mind you the resin is catalyzed with MEK-P (Methyl Ethyl Keytone Peroxide -- some call it rocket fuel. It will eat the flesh off the bone and then eat the bone.Why am I so excited? Because we finished today and the catalyzed resin was COOK-ING. "Too hot to touch" is about 180 for the average meat human. It's well above too hot to touch - in fact, the radiant heat is a bit much for most meat peoples. And that's with the prescribed 1% catalyst.More information coming soon :) It's going to take 8 hours to capture all that video :PPhoto: Adding more PVA to the pot in the middle of the second coat.

Topic by trebuchet03 12 years ago  |  last reply 12 years ago

workshop heating ideas.

Hello all, I have a slight problem, while designing my workshop for the winter months, I happened across a monumental problem... how am I going to heat it? As any Canadian reading this will know, our winters are not for the faint of heart (-50 anyone?), the structure I designed has a metal frame, HardiBacker lined inside and out as walls, screwed into the metal poles, fireproof spray foam insulation in between the cement board walls, it has been placed on a gravel surface, and is held to the ground by rebar that is nailed into the ground a few feet, and currently no ventilation. I know it has flaws left right and center, but I'm working with what i have right now, and I've got very little to work with. The structure is quite small 10' x 8' at 640sq. feet. Winter is on its way and I need ideas for heating. I've thought about wood heating but I'll need all the space I can get on the inside. propane heaters are quite expensive, and electric heaters.... well its out in the middle of a field basically. Im looking for something that can heat it up fairly quickly, and is safe, I made it fireproof so i guess a tiger torch isn't out of the question.....  Any suggestions are welcome! Cheers!

Topic by fasterthanfalcon 4 years ago  |  last reply 4 years ago