Ways to go about making a mechanism to lift then rapidly drop a small box lid?

I'm looking to build a sound installation that uses the sound of a sheet metal box lid slamming. The box would probably be approx. 6" x 6" x 12". I'd be willing to make it slightly larger. I'd like to have a mechanism inside the box that lifts the lid, then rapidly drops it, either pulling it shut or dropping out of the way. I'm sure a mechanism like this exists somewhere in the instructables for other objects but I'm not sure where to look! Any assistance would be very helpful!

Asked by floorwaxdesserttopping 6 years ago


KNex lift Idea's

Hi there, I was wondering if anyone had any idea's for a knex lift as I currently have no idea's for making. Any help?

Posted by Michaelgoode 7 years ago


Where can i find a body lift kit?!?!?! Answered

Okay!! So I have been looking for a body lift for my 1995 jeep cherokee sport and no luck!!! Can someone plz help?!?!?

Asked by arky2b 8 years ago


Electro Magnetic Core Solenoid

Dear Friends, I need to lift a weight of 100 grams or 500 grams weight using a solenoid. I can use any current DC or AC. What is the procedure for calculating this. Please help me. Ramanathan PS INDIA

Posted by RamanathanP 3 years ago



What is the difference between a hovercraft lift fan and a hovercraft propulsion fan? Answered

 I'm researching to build a hovercraft, and I am not sure what the difference is between a propulsion fan and lift fan.  I can find a hovercraft propulsion fan that requires 19 hp, but an engine like that is too expensive. The hovercraft lift fan only requires 11.9 hp, and I can afford an engine like that. So I was wondering if I could just use the lift fan as a propulsion fan, if I ever decide to build a hovercraft. I understand the difference in the fans' functions, but what is the difference in the fan itself? is it a different size, pitch or shape? ...All I really want to know is if I could replace the 'propulsion fan' with the 'lift fan'

Asked by frankenboom 8 years ago


is there any knex instructables that are ball machines, that use the lift of the big air ball machine?

I bought the big air ball machine, and was wondering if there are any instructables that use the lift from it.

Asked by the poodleo 7 years ago


Building a taller lift for my chair

So, I own an  adjustable bar-height stool with min-height of 24" and max-height of 33" and I wonder if it is possible to either   1) retrofit the existing hydraulic lift so I can get 10" more in height  2) Or completely build from scratch a similar hydraulic lift as the one I currently have installed except the new one would provide a max height of about 45"   I would appreciate any tips in accomplishing either of the above listed options please.

Posted by rumpells 2 years ago


What motor should I look into for lifting 50 lbs around 35-40 in. off the ground?

I have a project where I very simply need to raise and lower a flat board with a 50 lbs drill press 35-40 in. and have it stop at the same specific place every time going up and coming down. I've seen TV lift mechanisms and things such as that, but they cost $500 - $1,400. I need this project to cost very little. Here are all the parameters that I can think of.  1.) It will be stationary, i.e. — not require a battery or ever need to be moved.  2.) It must move slowly. Lift the surface approx. 1 in per second. i.e. — around 30 seconds to raise the surface 30 in. or so.  3.) It must be as quiet as is reasonable. It doesn't have to be whisper quiet, but def. not power-drill loud. 4.) It must be as inexpensive as possible.  I do not care about... 1.) Motor weight 2.) Dimensions 3.) Power consumption 4.) Heat production 5.) Longevity... it will be used very rarely so wear & tear is a non-issue really I very much appreciate any help you guys can give. 

Posted by Dolmetscher007 8 months ago


Loft Winch for Fun

Hi, I want to make a fun lifting mechanism which I can use to raise critical beverages, light office supplies, etc., to the loft in our house, where my office is.  It could be manual or motor driven.  It can brace, lean against or grip the square handrail and square balusters,  but can't mar or be screwed into any woodwork or flooring.  Ideas?

Posted by mahoopes 4 years ago


Does anyone have a hoist system to raise my garden tractor cab off the tractor and store on the ceiling of my garage?

I am looking for some help in designing a simple pulley system to lift my Garden Tractor Cab off my John Deere Riding Tractor and store it in my garage. It's a hard roof on my all-weather cab and weighs about 150 pounds max. I would be attaching it to the roof of my garage (both cab doors come off). I want to be able to back the tractor into the garage..and have this system allow me to lift it off, raise to the ceiling and store it until next winter. I have a bad arm so it's tough for me to manage it without this. thanks!

Asked by IRONSIDE2 8 years ago


Need hobby motor help

I'm a bit clueless about the technical side of motors. I mean I know how they work and I know torque and speed and whatnot, but I'm looking for certain motors with a certain amount of torque. I'm looking for a motor than can lift approx. 20 pounds plus itself and 3 other motors that have equivalent amounts of torque. I have no clue what the Stall-torque rating is or how it's measured, so a crash course in that couldn't hurt, either. Help?

Posted by Ryutso 7 years ago


Power Foil Kite? Please someone make instructable?!

Can someone make an instructables or give me info on making a foil kite from easily obtainable materials? After all Foil kites give greatest lift. I would love to boat or skate with a foil kite to pull me along. I would even try a flying myself (albeit  several feet from the ground so i wont kill myself). Please try. . Thanks Instructable COmmunity It doesn't have to be cloth sewed, it can be durable paper, plastic, foil or basically anything. Mainly i just want the basic layout design of the kite, its cells and some knowhow on why the cells inflate. (the winds inflate it, but why?) P.S i seem to have a surplus of garbage bags if any could one for that it would be appreciated

Posted by alester333 8 years ago


Will you be at this year's Maker Faire in San Mateo?

We want to see you there! Last year we paid a visit to each of our authors who were exhibiting at Maker Faire in San Mateo, and hooked them up with a little sumpin'-sumpin'. So, will we see you there this year? Let us know in the comments below, and share a little about what you'll be bringing to the show.

Posted by kazmataz 5 years ago


Simple 3 Floor Elevator Model

Hello I want to make a simple 3 floor elevator model. The Elevator should have UP and DOWN switches on every floor and should act as all normal elevator.  I need a simple and detailed circuit design and which components should I use for it. Circuit using Arduino Uno R3 is also preferred.  Can someone please help me?  Thanks

Posted by mbmz92 3 years ago


How can I make my robot lower and raise itself from the ceiling?

I working on a something that will be able to move along the ceiling. It will stick to the ceiling using magnets. To get through door ways, I need to be able to make it lower itself from the ceiling, move through the doorway, and raise itself back up to the ceiling. How can I get my robot to lower and raise itself? How can I get it to move horizontally through the air?

Asked by mastr924 6 years ago


What is the least destructive way to mount something that will hold about 100lbs?

I'm building a bike mount in my dorm room. I found that with our top floor high slanting ceilings that I fit the bike above with out bumping my head into it, or having it get in the way at all. The tough part if mounting it to the ceiling while still be able to repair the holes when I move out. My bike is angry at me that I leave it out in the rain all the time! Thanks for the help!

Asked by barnes 8 years ago


Producing Hydrogen to Function as a Lift Gas

The short version: I want to make hydrogen to fill model airship envelopes with, because screw helium. Help me make a cheap electrolysis device that can do this in under an hour (ideally), or come up with an even better system for production. My immediate problem is that I need a high-surface electrode that won't fail in a solution of sodium hydroxide.The long version:I've devoted a fair portion of my time to contemplating airships, primarily because they're awesome. Fell out of use with the rise of much faster aircraft, and the technology its fate sealed by the extraordinarily bad rep the Hindenburg gave it. It is still far from useless, however, in that lighter-than-air systems can lay claim to flight times measured in days, and sometimes months, thanks to the fact that they literally float in the air like a boat floats in water.Their day may have come and gone, but I still want to experiment with the technology and create some model airships of my own. Helium works okay as a lifting gas, but it remains expensive and isn't going to get any cheaper in the foreseeable future. It is for this reason that I am pursuing hydrogen, in the hope that I might be able to produce a cheap lifting gas for my projects. Unfortunately for my aspirations, hydrogen is surprisingly hard to get cheaply in decent quantities. Here's what I've figured out so far.For one, it is absurdly hard to find sites that don't veer into fringe science when talking about hydrogen. HHO production, Joe cells, power your car with water...it all keeps cropping up, and not only does none of this do what I want, the concepts are often poorly documented or riddled with problems. However, I have been able to glean some information from my research. First off, one of the easiest methods (and the one I'll be pursuing the most) of hydrogen production is through electrolysis. For those of you unfamiliar with the concept, you can basically take two electrodes, stick them in water, add some electrolyte (like regular table salt), and apply a decent voltage. You'll get hydrogen gas streaming out of the negative electrode and oxygen out of the positive electrode. Fancier systems use large tanks, platinum electrodes, and a strong acid or base as the electrolyte. To increase efficiency (yeah, it's not 100% efficient), there is ongoing experimentation with high-temperature electrolysis and ongoing research into an effective electrocatalyst.Now, when I did my research, I thought "Hey! This sounds easy! I'll just set the system up like explained, and away we go!" Unfortunately, those exclamation marks were unwarranted. My first attempt showed that production is mind-numbingly slow with small electrodes. Using salt had the wonderful side-effect of producing chlorine and sodium hydroxide, a.k.a. caustic soda. It's called that for a reason, and I'm lucky I didn't run it too long or I might have a chemical burn now. Now I know. Choosing a good electrode turns out to be a problem too, as most conductors oxidize quickly or dissolve in the solution (now I know why everybody uses platinum when possible). My aluminum foil electrodes in a sodium hydroxide solution? Yeah, that didn't work AT ALL. I had better luck with steel mesh, but I recently found that it seems to fail over time too. The only thing that isn't disappointing is the container and the collection apparatus: an inverted plastic bottle with some airtight hose running off it, connected to a gas valve. If the bottle is placed such that forming gas causes the internal water level to be lower than the external container water level, the gas will be pushed through the hose (no pumping necessary!). There was one good thing I discovered, however. Apparently there was a bit of soap or something left over in the container, and I ended up forming a bit of explosive foam as well. The hydrogen foam blows up like nothing else, and the oxygen foam makes a loud pop and sends (slightly) caustic foam all over the place. Totally useless but still somewhat cool, so long as you're not fool enough to do it in large quantities.So, as of right now, I've got a good container and collection system, but my electrodes suck and production rates are so low that it'd take me hours and hours to inflate a good-sized balloon anyway. I'll be using sodium hydroxide in the future as the electrolyte, skipping the chlorine production and observing the proper safety procedures. My top priority is finding a good electrode, my next is finding a good way to increase surface area, and my last is getting a higher voltage source than the 12V power supply I had lying around. Any ideas?

Posted by Cognoscan 8 years ago


What is the best knex ball lift without chain?

It needs to lift about 6-7 feet. Thanks!!

Asked by dt1234567100 7 years ago


What is your favorite K'nex Ball Machine lift type?

     3 years ago, I asked this question to get ideas for lifts in a ball machine I was building. Back then, the spiral lift won (there being only about ten lifts to choose from!). Now that the K'nex ball machine lift roster has septupled, I think it would be fun to see what the response is now. What is your favorite lift, and why?      It was hard for me to decide, but I think I narrowed my favorite down to the Shifting Arm Lift by Shadowman39 and Tornado96. This is my favorite lift because it is fairly compact, easy to extend, and just fun to watch! My decision was also influenced by the fact that I've built this lift and it worked quite flawlessly.      A close second is sandroknexmaster's Falling Arm Lift. The effect of this lift is amazing.      So, I've told my favorites: What are yours? :-) Note: Here is a list of most of the current lifts for those who for some strange reason haven't seen it yet.

Asked by MechanicalCreationMaster 4 years ago


Is there a hidden hinge that lifts a flush floor door?

Hinges for floor door/ trap door Is there a hidden hinge that lifts a flush floor door? As the door will be heavy, I'll use a gas piston to aid lifting and closing. I like the system used in http://kims-kitchen-remodel.blogspot.com/2009/01/basement-hatch.html but the hinges are visible. Thanks for looking!!! Miguel?

Asked by greenroofer 7 years ago


lift table from old adjustable bed

Have two old electric linear screw actuators that work great. I Need a lift table but can't figure out how to put it all together. I don't know what width or type of metal use for the lift or the bolt hinges???.  Does it have to be a scissor lift or can I keep the actuators where they are at each end of the bed, wire them to work together and make a lift that way?  I need an affordable way of doing this and it only needs to lift to about 500 lbs. from 17 inches off floor to 30 inches off floor.  All framing is angle iron but seems heavy duty. Anyone's help if greatly appreciated as I just cannot afford to spend $ 1000. + on an electric massage lift table. The pic is after everything but the motor/actuators were removed. Thanks Deb

Posted by DebMaudie 2 years ago


What is your favorite knex ball machine lift? Answered

I've been trying to figure out the best lift to use for my machine. I don't have enough chain pieces (24 is my amount), so I thought I'd ask around for other's suggestions.

Asked by MechanicalCreationMaster 7 years ago


Small model roller coaster - how to build the lift?

Hello, I've accepted the challenge of building a small-scale (no riders) roller coaster model for use as a prop in my church's vacation bible school next summer.  The vehicles are based on skateboard trucks, and the track is made from 1.5" PVC cut in half lengthwise, secured to a wood frame.  Motion is all gravity-based except of course for the lift hill, and that's where I'm stuck looking for a good design.  The vehicle is expected to remain in motion without intervention for a few hours a day, so the lift needs to engage the vehicle at the bottom, lift it to the top, and release it reliably.  The frame is still a work-in-progress and is easily modified, but for reference it's about 30' wide by 8' deep.  The height of the hill top is also still undefined but I'd expect about 6 feet or so, with any reasonable slope.  Any suggestions?  Thanks for any ideas.

Posted by acovington 5 years ago


how to install permanent air jacks on each tire side operated by 12v compresor system to lift car and change a tire.?

The idea is to install pneumatic jack on each tire. to lift the car when a flat tire occurs. one side at time, the system need to include security system to avoid unintentional or accidental operation when the car is moving. also the system could be hydraulic operated by 12 volts pump

Asked by 9 years ago


Radioactive lift controls recalled in France

NEW DELHI (AFP) - India's atomic safety body said Thursday that radioactive scrap metal which found its way into buttons installed into lifts in France had been traced back to a western Indian foundry.At least four Indian firms were involved in the manufacture of the components, an official said, but it was still unclear where the contaminated scrap originated."We are tracking back the whole chain," Satya Pal Agarwal, head of the radiological safety division of India's Atomic Energy Regulatory Board, told AFP."We are taking steps in each place. Exporters have been advised to buy monitors to check their materials before exporting."France's Mafelec firm delivered thousands of lift buttons to Otis, a subsidiary of the US elevator company, which installed them in at least 500 lifts in the country over the summer.Otis has said it is now in the process of removing the buttons, after France's Nuclear Safety Authority announced Tuesday that 20 workers who handled the lift buttons had been exposed to excessive levels of radiation.The French nuclear safety agency has said the lift buttons contained traces of radioactive Cobalt 60.AFP articleSteel items imported {into Sweden} from India showing faint traces of radioactivity were found in Sweden, before the same substance was traced on Indian-made lift buttons in France, officials said Wednesday.The levels of Cobalt 60, a radioactive form of the metal, were considered harmless and the steel components have not been recalled, the Swedish Radiation Safety Authority (SSM) told AFP."Dutch customs discovered that a shipment of industrial flanges from India to Sweden showed traces of Cobalt 60," SSM spokesman Mattias Skoeld said.Focus Agency feedFrench elevator maker Otis said it would remove the buttons from hundreds of lifts it has installed after a radioactivity scare over Indian-supplied materials.The company made the announcement after France's Nuclear Safety Authority (ASN) said 20 French workers who had handled buttons used in lifts had been exposed to to excessive levels of radiation.An Otis spokesman said the firm's plan to remove the buttons "concerned 500 to 600 lifts out of the 2,500 that Otis has installed, modernised or repaired between August 21 and October 9 even if there is no danger for users."The ASN classed the incident at factory of the Mafelec firm in the east-central French town of Chimilin at "Level Two" on a scale of seven because of the exposure of more than 10 people to doses exceeding the reglementary limit.SA Times article

Posted by Kiteman 9 years ago


Will you have to create holes in the lift fan, if purchased??

On a hovercraft will I have to create holes in the lift fan, if purchased

Asked by 9 years ago



what knex lift should i use to make a ball machine ? Answered

i will be making a ball machine but i dont know what lift to use

Asked by knexinventer 7 years ago


Knex Platform Lift

Hey everybody!!! Here is a forum topic from my new ball machine lift called: The Platform lift. I have bin working on it for 2 weeks and I am happy with the result.  But one thing I did't solve was the exit track because I tried a lot of things but it just didn't work. I hope you like it. Because there aren't a lot of views and comments I just made some clearer destruction pictures and I uploaded a parts list.  Here is the parts list: Rods: -Green: 143 -White: 37 -Blue: 112 -Yellow: 51 -Red: 3 -Gray: 5 total rods: 351 Connectors: -Dark grey: 29 -Light grey: 3 -Red: 20 -Orange: 6 -Green: 2 -Yellow: 41 -White: 24 -Purple: 82 -Blue: 48 Toltal connectors: 255 Others: -Blue spacer: 71 -Silver spacer: 28 -Tan clip: 12 -Y-clip: 7 -Black hinge: 1 -Blue hinge: 1 -Blue gear: 5 -Red gear: 4 - Knex motor: 1 Total others: 130 Total: 736 Here is a video of it

Posted by CassisDude98 6 years ago


Best way to lift a liquid using heat? (SImple pump designs)

I'm overhauling the design of my solar concentrator and now need a good way of lifting a fluid, so as to pour it into a waterwheel and provide rotation. I have a little solar concentrator and boiler to generate heat or steam. What's the best configuration to give as high a rate of flow as possible? I'm hoping for something in the range of 500 ml per minute, rising about 30 cm. I've briefly played around with the attached setup, which is a very basic bubble or airlift pump,  The black is my wheel, the blue a reservoir for the fluid (ethanol), the white is the boiler putting out steam (ethanol vapour) and the light blue is a mix of the liquid and bubbles of vapour which rise up the pipe and re-enter the wheel. It actually works ok, but even optimally only gives a third the rate I'm after. If necessary I can grab some valves from old bike innertubes, or other basic materials if they'll help. My previous design was to have the bubbles of steam going directly into the wheel, which was filled with ethanol. This works but requires heating 3 litres of ethanol to just under boiling. Not impossible but a bit of a hassle. I'm hoping lifting a liquid instead will be a bit easier.

Posted by SolarFlower_org 8 years ago


lifting base / platform

I need help on building a small 6 x 6 in lifting base. I'm trying to build a small lifting base to lift up a network camera to a certain height and then turn off once it reaches the desired height. If someone can help me I would be very grateful. Thanks Ecusta

Posted by ecusta 8 years ago


Can a plasma TV with a lift be mounted behind an electric fireplace? I have a small space and most are too big for it.

I would like to know how best to combine an electric fireplace and TV lift. Can I buy a TV lift cabinet and install an electric firebox in it or can I mount a TV lift to the electric fireplace or behind it?

Asked by 8 years ago


Motor for ceiling mounted cargo box storage lift?

Hi there, A year or so ago, I purchased a Thule 571 Roof Mount Cargo Box Storage Lift and installed it on the ceiling in my garage.  The ceiling in the garage has a fairly high ceiling though and using the crank that came with the lift is a bit cumbersome to say the least.  I usually have to stand up on a tire of the car in order to reach the crank to turn it efficiently. So the idea popped into my head that wouldn't it be really cool to connect a reversible electric motor to the lift so I could just flip a switch to lift it and then toggle the switch down to lower it.   Here's a link to the specific product I'm using, which I think Thule has discontinued because I couldn't find it on their website tonight:  http://www.overheadgaragestoragesolutions.org/thule-571-roof-mount-cargo-box-garage-storage-solution/ My questions: 1) What size/spec motor should I get? 2) Where can I get the motor from? 3) I'm assuming that any electric motor can be reversible just by swapping polarity in the switch? 4) Do I need a belt to ensure that the motor doesn't spin the worm gear too fast or should it just be a direct connection? 5) Any other thoughts/ideas? There's an open 110v outlet in the ceiling of the garage where the garage door opener is installed, so I could run a power cord to that outlet and then I presume I'll need to run a wired switch down to the wall of the garage where I want to be able to control the lift. Thanks in advance for your time and consideration.  This would certainly make my life a bit easier to be able to quickly and easily raise and lower my ski box onto and off the roof of my car.   Regards, David

Posted by dtepper 6 years ago


Scissor Lifts

Hey guys. I need to build a scissor lift that can fit an 18"x18" frame, and rise up to at least 4 feet. It needs to be very sturdy and stable, but I have no idea where to begin. Please help me out!

Posted by Eman34 5 years ago



Knex Challenge: Stair Lift

 This is a challenge that is open to all Knex builders.  The challenge is to create a two-path ball machine using 39Shadowman's Stair Lift. The machine must use the stair lift and no other lift systems, and must use the path separator shown in the video. The closing date for entries is 29th December.  I will look at the entries on 31st December and pick a winner.  The winner will receive five star ratings on their next five Instructables (including slide shows and videos). GOOD LUCK!  

Posted by DELETED_KnexLord1 8 years ago


What to do About Shadowman39's "Official Guide to Knex Ball Machine Lifts"

     As you know Shadowman39 on December 17, 2009 posted his Official Guide to Knex Ball Machine Lifts, but as of July 2011 he has not updated his guide. In fact his last comment on instructables was September 28, 2011. And since then there has been over 15 new lifts. So I was wondering whether someone should post a new and updated guide with all the new lifts created since. Not with all the lifts on Shadowman39's guide, but all the ones created since. It could be called something like, "The Official Guide to Knex Ball Machine Lifts 2" or something like that. If none of you guys are up to the challenge I will gladly take on the responsibility, but first I want to here what you guys think.                      UPDATE Sorry guys. Sorunome says he has been communicating with RNB and Shadowman39 via skype. He says that RNB will continue Shadowman39's guide as soon as possible. So please don't post another guide. Thank you.                                                                                                                                                                            KneXtreme 

Posted by KneXtreme 6 years ago


Any ideas for new ball machine elements/lifts/path separators?

Hi everybody! About one month ago I started the construction of a new ball machine. I'm not gonna tell anything about it yet, so don't ask for details ;) Well, I'm not making this topic just to make you courious. At the moment I'm out of inspiration. Do you have any new ideas for new elements/lifts/path seperators? The machine allready took approx 1/3 of all my parts, so I can still make it much higher. All ideas are welcome and will be considered Thanks, ~Sandroknexmaster~

Posted by sandroknexmaster 5 years ago


Plans for Cataclysm Changed

I had to demolish the lift on Cataclysm because it wasn't working very well. Click here for more information on why I took the lift down: http://39shadowmansknexcreations.blogspot.com/The ball machine will still have its originally planned design; I'll have to build a new lift to replace this lift. I wish I wouldn't have wasted my whole summer building this lift. The pictures below is what the lift looked like before I took it down.

Posted by Shadowman39 8 years ago


can ducted propeller produce twice lift compared to opened propeller ?

Can ducted propeller produce twice lift compared to opened propeller ? for example if there is an opened propeller with low rpm producing some amount of lift. If we ducted that opened propeller and provide same rpm and power as opened propeller to it will it produce twice lift compared to opened propeller with same rpm and power ?

Asked by MuhammadK19 11 months ago


Lifting form?

Garage plates water damage; need refresher course on plate raising with threaded rod & concrete.

Asked by WendellB8 12 months ago


How much lift is created by a half-sized rotor?

If there is a rotor of 26ft rotating at 600 rpm and lifting 635kg of weight at 1200ft/min 14000ft so if there is rotor of 13ft HalfSized 26/2 =13 and same rpm 600 & same power so will it lift half of the weight like 635/2=318kg at 1200ft/min 14000ft ? if not then how much half sized rotor will lift at same rpm and power if 26ft rotor is lifting 635kg at 600rpm at 1200ft/min upto 14000ft then how much 13ft rotor will lift at same rpm and power at 1200ft/min upto 14000ft ? The helicopter used in this example https://en.wikipedia.org/wiki/Robinson_R22

Asked by MuhammadK19 11 months ago


I want to make a cheap Lifting Gantry

G'day, I am getting old and need help to make a cheap lifting Gantry. I have a lifting device to lift 1/2 ton.  I want to be able to place the device on or near the car trailer.  To be able to lift something like a half full 44 gal drum of rubbish, rocks, sand and tip in into my trailer to take to the dump.  Something simular to this.  Just two uprights and a cross piece that I can hang my lifter on. Cheers Perry

Posted by Perry The pom 2 years ago


Knex ball machine lift? Answered

Hey guys,Does anyone have the instruction pamphlet for the ball machine with the lift featured in this video?http://www.youtube.com/watch?v=sBDdXyaFQEgIf would would, please let me know, I need a peek at a page or two.Thanks!IaC

Asked by I_am_Canadian 9 years ago


Is there a specific ratio between lift and wing size? Answered

I am working on an rc plane and wondered if there is a ratio between propeller size to wing size, wing size to lift, or weight to wing size. Thanks!

Asked by DELETED_afw11 9 years ago


New lift ideas.

I have a couple lift ideas that im going to share, but no stealing! >:-( 1. Spoon lift. the ball waits on a path, and a "spoon" that rotates on an axis comes down, picks the ball up and drops it at the top.                             0 ______                              I                              I                          _______ 0 - - - - - o this is a picture of the idea. the ball waits at the ramp (the line) and the two spoonlike things would be the two positions of where the ball would get on and off. the line at the top is the exit path. 2. bar lift. this is basically a chain lift, but with a rod sticking out horizontally. the ball is picked upby the bar, then deposited at the top.                     0            the zero is the chain and the hyphens are the rod. the ball is cushioned                  -------         the chain and rod. obviously, the rod would be connected somehow.                                   This is supposed to be an aerial view, so it kind of looks like a chainsaw. If you want any pictures of these lifts, i will post some pictures. Feel free to post any other ideas for new lifts.                   

Posted by Purple Waffles 7 years ago


how to design a wind powered water lifting system?

I need to lift water from the higher tank to the lower tank ( against gravity)...i difference between tank a and tank b is 20 cm only

Asked by lulu114 6 years ago


Simple nail and wire Electromagnet problem ! Answered

So I built a simple electromagnet out of a nail and wire, I hooked it up top power and a switch. What I need to do is to lift a small metal ball the size of a common marble with my electromagnet, when I press the switch ( momentary, when you press it, it shut off power and when you release it power get back) the ball should fall of it, but problem is, the ball stay magnetized to the nail !! The only solution I found up to now is to make the electromagnet just enough powerfull to hardly lift the ball, but I hate it because its a pain to get the ball to stick on and it often fall off randomly. Is there a way the ball could fall off every time I press the switch without reducing the strength of my electromagnet? Thank you !!

Asked by Patented 7 years ago


where do i get the screamin serpent knex coaster other than online???

I really want the knex screamin serpent knex coaster but i cant find it anywhere (i live in london, ontario)

Asked by rybubbles 8 years ago