Pop can Stirling engine, 0-900 rpm in 3 seconds!

[Robots4Sale]

Sell it to me

[playingwithfirehurts]

wow, that is the most well balanced coke can one on the tube!

[TheAtm1982]

nicely built

[gunny426plymouth]

Man your like the performance tuner of sterling engines! I plan to make one soon, though I might do a "walking beam" sterling engine...

[cymru1100]

can you send the plans to me on how to construct this stirling engine please :)

[approtechie]

@cymru1100 Man, I get all these requests for plans for this engine but it really didn't last all that well, the pop cans are pretty fragile and eventually collapse, so I've not produced any plans for it. Sorry. You can look at the 1065 rpm video I have up and at the end there are some photos of how I made it.

[wmd2099]

hey dude, would you be able to send me instructions to make this? this is the best one ive seen and i cant find an instruction video on youtube

[andy232005]

I would love the build plans for that sunkist and what else?

[dzpisx]

Woah it's like you discovered the secret to making a wheel spin forever and ever!

[TheOnlyCanadian25]

I just want to know what is in the somewhat large and square platform that the engine sits on.

[approtechie]

@TheOnlyCanadian25 It's an empty metal box with some small welding magnets on top to hold the engine steady while I videoed it. There's also a Sterno can on top with alcohol in it for heating the engine.

[brandonsg123]

lol ... HEY EVERYONE GO DOWN TO YOUR LOCAL HARDWARE SHOP AND BUY A BRAND NEW STIRLING SAW... lol thats awesome dude

[DB1Lover]

sweet your like the edelbrock of soda can engines

[approtechie]

@DB1Lover LOL! Good one!

[alabala327]

@approtechie is the dispalacer perfectly airtight ? the diaphragm is a bit loose or on its own elasticity does the push?

[approtechie]

@alabala327 The displacer rod has a sliding seal through a 1/16" ID brass tube fixed in the top of the cylinder can. The diaphragm is pre-stretched before it's glued around the edges so that it doesn't have to stretch at all while running. Otherwise the stretching would absorb quite a bit of power.

[alabala327]

@approtechie i have made 3 holes about 1.5 mm each because i didn't find the perfect center and i didn't cover them and the diaphragm i didn't stretch it ...i'm a bit noob

[alabala327]

@approtechie how should i make the rod ( crank ) i saw some videos the piston rod about 2.5 mm height and the displacer 1 cm height and those 2 need to be at a 90 degree angle?

[badmandagga]

heyy can u send me a message with materials and so on how to build one of these I'm trying to make one for a science project

[approtechie]

@badmandagga Look at my other video "Pop Can Stirling Engine #3 - 1065 rpm" at the end there are photos of the build. Read the comments since I've described pretty much everything about how to build it.

[badmandagga]

how do u build this

[ASIANzINVASIONz]

damn all the other can sterling engines dont come close to this haha



[chlb29]

it looks like its in slow mo

[RomanKnight88]

cool :D engine what energy useing this engine? -is magnetic - motor or something' ?!

[approtechie]

@RomanKnight88 No magnets, this engine is running on a small alcohol flame underneath it which creates a temperature difference between the two ends of the cylinder. You can read about the Stirling engine and how it works in various places on the Internet including wikipedia.

[RomanKnight88]

@approtechie ok thats amaizing :D thank you very much for your replay have a nice day :) so is 5* Stirling engine who runs with alcohol

[RomanKnight88]

@approtechie ok thats amaizing :D thank you very much for your replay have a nice day . nice Stirling engine :D

[LiquidChem]

i love how theres like a hundred thousand videos of stirling engines, and none explaining how to make one. thanks.

[approtechie]

@LiquidChem I've actually pretty much explained how to make this in the photos and comments I've answered. Watch the vid with the soda can engine doing 1065 rpm and at the end are photos of how I made it. Read through the comments and you'll get lots more info. I don't make these pop can engines anymore and have no plans for them. Visit YouTuber specallez and you'll see some simple engines and instructions how to make them.

[TeoFirefox15]

please can you send me a private message and show me how to create it?? please please i need it for my exam

[managanst1984]

I did it !!!! I DID IT!!!! after 3 days and 5 trys i Built one of these bad boys!!! i call my working one mark 5 !!!! it ony goes at like 100 rpm right now!! but just that i got it working is cool as hell!! and its all thanks to this dude and his video!! thanks man whoever you are your the man!! and i hope i can beat your pop can engine record!!

[approtechie]

@managanst1984 Go for it!

[gizmoguyar]

Wow I'm really impressed, I could only get mine to run at ~100 RPM.

[subtotal17]

just let me ask, this cup that looks like an ash cup on it, it has a little pad that pluggs the hole very fast. does this hole bring oxygen to a fite or is it only building preasure under the motor?

[approtechie]

@subtotal17 That cup has a rubber diaphragm and bottle cap, no holes. It's like a piston but is completely sealed, no leaks possible. Check out Stirling engines at wikipedia and you'll get a good idea of how they work.

[ceet12]

sorry to sound dumb, amazing creation by thew way but what would this be used to power?

[approtechie]

@ceet12 Mostly this is a demonstration engine to test out ideas, but it could be used to power a small pump or generator. I never managed to get these soda can engines hooked up to anything useful since they were so fragile. My newer water bottle engines are much better and can drive many things, albeit still small. Bigger engines on the horizon...

[olemac20]

Thank you for responding so promptly to my questions. So to not be boring, I would just ask one more thing. You you said that the elbow had PVC 1 / 2 "inches in diameter. But this diameter corresponds to the diameter of the hole in the tin cylinder immersed? That is, the hole in the can is even 1 / 2" inches or is it less and the elbow only serves as a connection between cylinder and power piston? Thanks for your time and congratulations for your work.

[approtechie]

@olemac20 The PVC elbow connects the cylinder to the power diaphragm and passes through a hole in the cooling jacket. I sealed all the joints with red RTV silicone. If you go to my other video "Pop Can Stirling Engine #3 - 1065 rpm" at the end you'll see photos of how I did it.

[olemac20]

sorry, i forget other question, about the speed. the following relation may have a valid/direct reason for the speed?--> airflow sent / received by the power piston to the other cylinder. I mean, if the flow is larger or smaller, this affects the speed or another aspect of the engine? Tkx

[approtechie]

@olemac20 In these small engines the compression should be low, so the power piston/diaphragm shouldn't move much air. You should still make sure that the airway is about 1/2" in diameter so the flow is not restricted. Keep all airways smooth and no square corners. I used a 1/2" PVC elbow.

[olemac20]

Hi! Tath engine is awsome for pop cans... :) I've teied to do one, or better, i tried 2 because my first one doesn't work (and i use it as a football ball lol) but the second one has worked and has reach 390 rmp. I just dont know how to make it faster. U know how pls? Ohhh, and, any tips about what main problems happend so that my first engine did not work? And again... congratulations by your engine! Are you a engineere or just a genious? lol

[approtechie]

@olemac20 You have to pay close attention to details to make them work well: strong enough crankshaft so it won't flex, bushings on all rotating joints, steel wool not packed tight but still touching the can walls, as little dead volume as possible, no stretching of the diaphragm, no leaks in the cylinder, no obstructions in the airways, minimum friction on all sliding and rotating joints. And thanks! I'm neither an engineer nor a genius, just a motivated innovator.

[mryvanmalo]

amigo ese artilugio seve bien pero podrias hacer un video de como aserlo para yo intetar aserlo

[approtechie]

@mryvanmalo Ya no hago estos motores de lata aluminio porque son muy fragiles. Uso ahora los recipientes de acero inoxidable para agua. Todavia no tengo planes ni instrucciones para hacerlos. Estoy tratando de mejorar su fuerza primero. Gracias.

[toxicwar]

HOW THEW HELL DID U DO THat o-o i wanna make somethign like that DX

[approtechie]

@toxicwar Read the comments and you'll get about all you need to know to build one.

[homefiresburning]

Not sure what you meant when you said you "eliminated the displacer and just move the regenerator". How can this work without a displacer? My question was going to be what weight is the displacer? Compared to the flywheel? I am guessing the displacer should be heavy enough to assist the crankshaft back around, its full turn, but light enough that you are not working (much) against its own weight. My first Sterling worked but at a very low RPM.

[approtechie]

@homefiresburning Well, I'm not really displacing the air - I'm moving the regenerator back and forth through it. This principle was used on the Robinson engine back as early as 1880. The displacer/moving regenerator should be absolutely as light as possible to reduce balancing issues. It gives zero assist to the crank, the crank has to drive it. The flywheel should be only as heavy as needed to carry the engine through the compression cycle smoothly at rated speed, and it should be balanced..

[moparguy318]

i need detailed insructions on how to make this...please............

[approtechie]

@moparguy318 Sorry, but no plans. This was a just step along the way toward developing a simple inexpensive engine for people in developing countries. The soda cans proved to be too fragile for my purposes.

[foamyislord]

You just made the fuel source hotter and put ice in the water <.<

Still impressive though.

[approtechie]

@foamyislord Same heat source, just some ice and some tweaks.

[snnacho]

Very well done! This is super impressive and I would like to try to build one sometime.

[ROCKNTV1]

good job bud . sucs that cams dont do justice to rpm

[approtechie]

@ROCKNTV1 Thanks! True on the cameras - the best you can do is estimate by watching the strobe effect.

[ROCKNTV1]

@approtechie yeah bud, werking on one myself wont be perty but am sizing for power

[SnowReport321]

How can I make one ?

[approtechie]

@SnowReport321 No plans, but look at the end of my other video "Pop Can Stirling Engine #3 - 1065 rpm" for photos of how I made it.

[aarongriffin81]

One of the better pop can stirlings I've seen, good job! I have made alot of stirlings myself but the only one I made from pop cans happened to be the very first stirling I made so it was cool but nothing too special. I use bearings on any stirlings I make now and build with longer term running times in mind. I plan on a full size build (around 5-6 liter compression chamber) hopefully in a couple months.

[approtechie]

@aarongriffin81 Would love to see video of your engine when done!

[1BustedMyth]

Nice and simple, great one ! ;)

[ex57perimento]

hello, congratulations for the achievement, I'd build one and you can not have the insight or plans?

[Nykkytta]

Very nice.

[inginerul1987]

hey..very nice :) What does it run on? candles? how many? Just curious.

[approtechie]

@inginerul1987 It will run on one candle but is shown running on an alcohol flame.

[yoyohoes]

sweet howed u make it

[SthealthRaider]

Dang i really need to know how to build this engine :3

[SthealthRaider]

steel wool regenerator?? u mean the displacer :S

[approtechie]

@SthealthRaider Actually, the "displacer" is made of steel wool and is a moving regenerator, hardly displaces any air at all. Instead of displacing the air back and forth between hot and cold sides through a regenerator, I eliminated the displacer and just move the regenerator.

[tried12usernames]

i'm no expert, but it certainly looks like it could charge a phone's battery, all you need is ice and a few lit candles and voilá, "free" phone charging

[vergaranunes]

Este cara é o melhor!

[NigelLoller]

Revs about 1000 more than mine!!!

Great machine

[vergaranunes]

Parabéns!!! Teus motores chegam a me causar inveja. Velocidade e força fenomenais! Segue postando... quem sabe com mais detalhes da construção...

[WorldStove]

that is glorious! WELL DONE