Use 91 percent alcohol or denatured alcohol for hotter flame. Then use low viscosity oil on all moving parts. But no oil in piston tube or you will change compression. Then connect your tiny motor. Very nicely done.
the location of the heat seems to be in a bad position for the standing wave, from my knowledge you need it roughly 1/3 the way in from the closed section
FASCINATING! I see the problem with the small dynamo, though...perhaps a smaller pulley and remove 'half' of the magnets in the dynamo case to lower magnetic resistance - then, instead of the tiny motorized fan - just put an array of LED's - flashing and non-flashing...it would work - since LEDs need much less current than the fan motor...
Thanks for the thoughtful comments Rodney! I actually did try different pulley sizes, and replaced the motor (generator) with a smaller unit with less rotational resistance. See the result in the second video, Thermoacoustic Engine 2. Cheers!
Parabéns Robert😄!!! Ficou muito bom o seu termoaustic, eu gosto muito!!!! Venha dar uma olhada em meus stirlins, talvez goste e possamos compartilhar!!!!! Um grande Abraço de Marcos Valério Ciência, Rio de Janeiro, Brasil!!!!!😃😃😃
Hello James! Yes, it was a cool little project. However, despite it's simplicity, we found out that it requires very specific tolerances in order to run!
Looks as though you figured it out. The old saying, if you were stuck on a deserted Island and could only have one thing, object, person, gotta say it would be you, because I know we wouldn't be there long. :)
Hah! You're too kind James! I think tinkering around on the farm back in Los Alamos, and playing with airplanes, cars, and farm machinery, gives one a solid understanding of machines, and how they work! I know Brent learned a lot from this experience!
dont convert the axial movement to rotary to generate energy. Use the axial directly, placing static coils into cilinder, and magnets on the piston. much less energy loss.
Hello...There are many very detailed videos on TH-cam that can provide you with step by step instructions on how to build this type of engine. Our particular design was based on the general concept of a Stirling heat engine, and is far from perfect! The primary component used to build the engine is the graphite piston. It is marketed by the Airpot Corp. as a pneumatic actuator, and is available as a free sample product from their website. Other components include; flywheels fabricated from raw aluminum bar stock, bearings from my son's Widget spinner collection, test tubes from his school science lab, metal brackets from Lowes, tiny electric motor salvaged from an RC helicopter, and various plastic pulleys, steel rods, and brass tubing from my RC airplane parts bin, and our local hobby shop. Check out these other videos on YT . . . th-cam.com/video/P5bQhGw3Ev4/w-d-xo.html, th-cam.com/video/V9XgIo7RWDw/w-d-xo.html.
Hello Ajay...In simplest terms, if the tube were open at one end, you would hear a high frequency sound wave emanating from the glass tube, caused by the temperature differential created within the tube, as one end is heated. (See this excellent video: th-cam.com/video/abswNCqnMRQ/w-d-xo.html ) Simply put, a rhythmic "standing wave" is created, and harnessed to create work, when the open end of the tube is enclosed by a piston. Hope this simplified explanation helps.
some late thoughts. this engine has a wobbly flywheel. you may realize that thermal isolation of cold and hot sides is the KEY to maximum performance, of a heat engine; especially, during during periods of more-continuous operation. compare a high-speed, alpha stirling, with exceptional thermal isolation. googletranslate th-cam.com/video/mfyvd5KhA0k/w-d-xo.html&t=
Hello Metin...My son inadvertently drilled the center hole for the large flywheel slightly off center, so to compensate, we purposely drilled the small flywheel hole slightly off center as well, then oriented the mismatch 180 degrees from the large flywheel when we located it onto the shaft. The wheels were then balanced together (note the brass plugs on the large flywheel) after they were mounted on the shaft. The "wobble" effect is primarily visual, rather than dynamic. Thank you for your comment!
In simplest terms, if the tube were open at one end, you would hear a high frequency sound wave emanating from the glass tube, caused by the temperature differential created within the tube, as one end is heated. (See this excellent video; th-cam.com/video/abswNCqnMRQ/w-d-xo.html ) put, a rhythmic "standing wave" is created, and harnessed to create work, when the open end of the tube is enclosed by a piston. Hope this simplified explanation helps.
실력이 대한 합니다! 짝~짝~! 죄송하지만, 만드는 과정도 촬영해 주시면 더욱 감사 하겠습니다! I'm good at it's good! Munch! I'm sorry, but I'd appreciate it even more if you could film the making process!
Use 91 percent alcohol or denatured alcohol for hotter flame. Then use low viscosity oil on all moving parts. But no oil in piston tube or you will change compression. Then connect your tiny motor. Very nicely done.
Thanks for the advice! We did make a few other minor tweaks to get it run successfully, see Thermoacoustic Engine 2.
the location of the heat seems to be in a bad position for the standing wave, from my knowledge you need it roughly 1/3 the way in from the closed section
FASCINATING! I see the problem with the small dynamo, though...perhaps a smaller pulley and remove 'half' of the magnets in the dynamo case to lower magnetic resistance - then, instead of the tiny motorized fan - just put an array of LED's - flashing and non-flashing...it would work - since LEDs need much less current than the fan motor...
Thanks for the thoughtful comments Rodney! I actually did try different pulley sizes, and replaced the motor (generator) with a smaller unit with less rotational resistance. See the result in the second video, Thermoacoustic Engine 2. Cheers!
Me fascina el pistón expuesto con sus recorridos .
Very neat work
Thank you John! Cheers!
How to calculate efficiency of thermoacoustic engine?
You relate it to carnot efficiency
Hey Robert, that looks like it was a really fun project! Thanks for sharing it!
Yes it was Frank, and a bit frustrating trying to get it to run!
Parabéns Robert😄!!! Ficou muito bom o seu termoaustic, eu gosto muito!!!! Venha dar uma olhada em meus stirlins, talvez goste e possamos compartilhar!!!!! Um grande Abraço de Marcos Valério Ciência, Rio de Janeiro, Brasil!!!!!😃😃😃
That’s really cool Robert!
Hello James! Yes, it was a cool little project. However, despite it's simplicity, we found out that it requires very specific tolerances in order to run!
Looks as though you figured it out. The old saying, if you were stuck on a deserted Island and could only have one thing, object, person, gotta say it would be you, because I know we wouldn't be there long. :)
Hah! You're too kind James! I think tinkering around on the farm back in Los Alamos, and playing with airplanes, cars, and farm machinery, gives one a solid understanding of machines, and how they work! I know Brent learned a lot from this experience!
dont convert the axial movement to rotary to generate energy. Use the axial directly, placing static coils into cilinder, and magnets on the piston. much less energy loss.
Superb
that's so cool! an amazing experiment, Robert my friend!
Thank you John! We were able to rectify the torque issue with this engine in video 2...
I'll check your second video out now!
Dear sir please tell me how to make this engine
Hello...There are many very detailed videos on TH-cam that can provide you with step by step instructions on how to build this type of engine. Our particular design was based on the general concept of a Stirling heat engine, and is far from perfect! The primary component used to build the engine is the graphite piston. It is marketed by the Airpot Corp. as a pneumatic actuator, and is available as a free sample product from their website. Other components include; flywheels fabricated from raw aluminum bar stock, bearings from my son's Widget spinner collection, test tubes from his school science lab, metal brackets from Lowes, tiny electric motor salvaged from an RC helicopter, and various plastic pulleys, steel rods, and brass tubing from my RC airplane parts bin, and our local hobby shop. Check out these other videos on YT . . . th-cam.com/video/P5bQhGw3Ev4/w-d-xo.html, th-cam.com/video/V9XgIo7RWDw/w-d-xo.html.
я так понимаю, показания прибора надо на 2 делить
why are you rotating the apparatus
Because I can...
Where's the 'acoustic' part of the machine?
Hello Ajay...In simplest terms, if the tube were open at one end, you would hear a high frequency sound wave emanating from the glass tube, caused by the temperature differential created within the tube, as one end is heated. (See this excellent video: th-cam.com/video/abswNCqnMRQ/w-d-xo.html ) Simply put, a rhythmic "standing wave" is created, and harnessed to create work, when the open end of the tube is enclosed by a piston. Hope this simplified explanation helps.
nice work !
Thank you!
Cosa volevi dimostrare ? ? ?
some late thoughts. this engine has a wobbly flywheel. you may realize that thermal isolation of cold and hot sides is the KEY to maximum performance, of a heat engine; especially, during during periods of more-continuous operation. compare a high-speed, alpha stirling, with exceptional thermal isolation. googletranslate
th-cam.com/video/mfyvd5KhA0k/w-d-xo.html&t=
Your machine is excellent but some have mechanical problems such as balancing
Hello Metin...My son inadvertently drilled the center hole for the large flywheel slightly off center, so to compensate, we purposely drilled the small flywheel hole slightly off center as well, then oriented the mismatch 180 degrees from the large flywheel when we located it onto the shaft. The wheels were then balanced together (note the brass plugs on the large flywheel) after they were mounted on the shaft. The "wobble" effect is primarily visual, rather than dynamic. Thank you for your comment!
th-cam.com/channels/Vb9sCXeDj9AomkrThFX2WA.html
I saw nothing "acoustic in that thingumalig ...
In simplest terms, if the tube were open at one end, you would hear a high frequency sound wave emanating from the glass tube, caused by the temperature differential created within the tube, as one end is heated. (See this excellent video; th-cam.com/video/abswNCqnMRQ/w-d-xo.html ) put, a rhythmic "standing wave" is created, and harnessed to create work, when the open end of the tube is enclosed by a piston. Hope this simplified explanation helps.
Nice
실력이 대한 합니다! 짝~짝~!
죄송하지만, 만드는 과정도 촬영해 주시면 더욱 감사 하겠습니다!
I'm good at it's good! Munch!
I'm sorry, but I'd appreciate it even more if you could film the making process!
So it cant run the mini propeler? So sad.
It did after some minor tweaks...See "Thermoacoustic Engine 2"
Bhai jo garm ho rha hai ye kya hai
Why are you rotating too much?
It was at the suggestion of my son, to rotate it while it was running. It was his 6th grade science project.
Ooo. . I am happy to know this.
Now, I am all set. ...love for your lovely son.
k.. going from a big gear to a smaller one isn't good. It needs to go from small to larger.
Both configurations were tried, with no measurable enhancement in performance...Cheers!
It's a Stirling Engine, 1816 by Mr Stirling. Don't rename it, that's very disrespectful.
Isn't this a Stirling engine?
Yes, it has been described as a particular type of Stirling heat engine.
Not acoustic generator.
th-cam.com/video/abswNCqnMRQ/w-d-xo.html
New tools in celling wending machine
whay dont puch it to the other side and back?,,,ok then we se the wire,ok,
Para com essa coisa quieta se quizer ganhar um like
That’s a desktop Stirling engine, not thermoacoustic
th-cam.com/video/abswNCqnMRQ/w-d-xo.html
সুন্দর
Deja de darle vueltas
Cool tinker toy but pointless pursuit
Absolutely . . . Most 6th GRADE SCIENCE PROJECTS are! Cheers
Looks pretty cool to me.
motor q lagaya re
Al pedo eso y aburristes dando vueltas el juguete☁️☁️☁️
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Iove..u....Fc..
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Y.engan.toy.hai
Go VI
Jalok
Топорная работа
Diy steam engine
Wait, that's thermal
Needs combustion and fuel like any engine modi will not be impressed
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