Wow.. its alway great and wonderful to watch again video of ur sterling engine.. one of the best..! I also came back to listen to ur background music.. it's so calm..! I always comes back here just for the music and the enjoyment of watching ur DIY.. Btw, I built 3 of it.. but one didn't work.. not sure what's the problem is though it's the same exact calculation.. hihihi.. and none of the children succeeded.. lol.. but they did enjoy watching the two models I've made and left it at their school..! The school is the 1st and the oldest built and sponsored by Jica of Japan and built according to the specification of Japanese kindergarten in my country. Tqtqtq very much for ur awesome project.. and I do wish that ur in the very best of health at all times.. God bless u always Sir..! Regards from Malaysia..! 😁😁😁.. have a wonderful days ahead..
I take my hat off to you sir. I was spell-bound watching your solutions to engineering problems so that you could make use of discarded materials (e.g. old hard drives). I am curious what the phase relationship between the displacer and the drive piston. Very impressive engineering. Thank you for sharing.
Thank you for visiting. The phase relationship is that the displacer rises at 30 degrees before reaching bottom dead center, and the displacer falls at 120 degrees before reaching top dead center. (7:45)
Congratulations, a perfect finish for your engine and it works very well. I also found the materials you used easy to access interesting. Leandro Wagner.
This is really a wonderful project.. and if included all parts and measurements, it'll be really great project to build one myself..! Waiting for the tutorial. Thanks, I really enjoyed the video and the music too.. Regards..!
yattemita３２５ I'm trying to build one for the pre school childrens' coming project to encourage them. I have the HD disc.. could you kindly tell me the height of the pole, the displacer and the plastic bottle for the displacer's chamber.. My calculations for the pole is 7.5mm, displacer's diameter is 46mm, piston rod length is 5.5mm, plastic bottle height is 3mm and the ring to cover the disc hole is 3-3.5mm..! Really hope the next video of yours all measurements would be labeled.. Thank you so much for the idea and hope you'll be able to assists me with the measurements. Regards..
The height of the aluminum channel pole is 65 mm. The displacer has a diameter of 80 mm and a thickness of 15 mm. The length of the piston rod is 35 mm. The diameter of the plastic bottle is 90 mm, the height is 18 mm. The diameter of the brass ring covering the hole of the disk is 35 mm.
@@yattemita4447 Wow., that's very kind of you to fast reply me together with the measurements required. I really appreciate all the efforts taken.. I also might use your ideas on simple projects for the children to build.. Thanks again for all help, ideas and projects.. God bless you always. Regards.. Thank you very much.
Thank you for your comment. The dimensions are PET bottle diameter 90mm, height 18mm Displacer diameter 80mm, thickness 15mm The piston diameter 18mm, length 20mm and length of the piston rod is 35 mm. The vertical movement distance of the piston is 9 mm. Neodymium magnet 6mm diameter, 2mm thick The height of the aluminum channel pole is 65 mm. The diameter of the brass ring covering the hole of the disk is 35 mm.
I like the idea using the magnets. I dislike trying to make another good performing low-displacement sealed compliance from common materials. Good job 👍
Is this able to reverse because the phase angle between the displacer and drive-piston is loosely coupled via magnet and therefore only determined at runtime? Very clever!
Hello Mr. Yattemita. I found your video and design very inspirational. I was impressed by the minimalist approach and the very clever use of epoxy. I am thinking about adapting some of your ideas and modifying them by replacing the aluminum posts with 3d printed components for my design. At first I was very excited because at first I thought the top and bottom where CD or DVD's (of which I have many hundreds), but then I realized from reading the many comments that those are made from aluminum that have a much higher heat conductivity than polycarbonate. Are those disks from a hard drive? For my design I plan to use a CD for the flywheel, since I have many of those. I found you piston design very interesting as well. At first I considered using to a glass tube with graphite piston, but your approach is making me re-think that there are other possibilities. Have you add issues with the piston leaking over time? Is there any lubrication on the piston/cylinder? ありがとうございました
Thank you for visiting. Those discs are from the hard drive. Please note that some hard disks are made of glass. For now, the piston does not leak. No lubricant is used on the piston / cylinder.
Todos os japoneses são pacientes, inteligentes e habilidosos assim como o senhor !? Essa é a ideia que fica. Porque o ocidental vai dizer que isso é truque !! He he.
Thank you for watching. There are no drawings. The dimensions are PET bottle diameter 90mm, height 18mm Displacer diameter 80mm, thickness 15mm The piston diameter 18mm, length 20mm and length of the piston rod is 35 mm. The vertical movement distance of the piston is 9 mm. Neodymium magnet 6mm diameter, 2mm thick The height of the aluminum channel pole is 65 mm. The diameter of the brass ring covering the hole of the disk is 35 mm.
Excellent interesting idea , tutorial and job! Please can you mention the specifications and dimensions of the two neodymium magnets. In all reactions and answers I cannot find them. Best regards from Holland, Stirlingmodels, Huib Visser.
It wouldn’t. The oscillation of the piston and displacer need to be 180 degrees out of phase. However the addition of a weak spring above the displacer would allow the engine to run in any orientation.
Thank you for your wonderful design. I built 1 Sterling engine. It ran, but it was not as good as yours. I will be building one with your design. Can 1mm aluminum be used instead of hard drive discs? Thank you for inspiring many to build Stirling's. Ed
Good invention. 👌👏👏👏 If the water get cold will it work Continuesly ? For copper pipe can we use plastic pipes like pen? Please reply Thank you. Arul Jose : from Tamilnadu, South India.
Sir that hard disc made from plastic or brass ?? Because they shining to much , and how much clearence between power piston and cylinder , and how much clearence between displacer piston and outer wall ( plastic bottle ring) please reply
Hard disc is made from aluminum. The gap between the power piston and the cylinder is not measured, but it is made to move lightly with little air leakage. The gap between the displacer piston and the plastic bottle ring is about 5 mm. Thank you for watching.
Sir I try many time but not working , can you explain what was my mistake ??? I'm not using plastic bottle even I use 90 mm thick pvc pipe is that my mistake ?? Or something else ?
Since CD is made of plastic, it does not know whether it works well because the heat transfer is worse than that of hard disk aluminum. Use metal if possible.
![ใจเสาะบนเกาะนาคี - อ๊ะอาย สกุณาพร เสียงวิหค [Official MV] | ค่ายเพลงเป็นหนึ่ง](http://i.ytimg.com/vi/jbcmGQkfyOg/mqdefault.jpg)
Beautiful. Thank you for being so visually comprehensive in your fabrication.
Thank you for your comment.
Brilliant !!! The use of a neodymium magnet to get rid of an additional slider as in a normal membrane system, brilliant !!!
Thank you for your comment.
I like the magnet idea and the use of CDs Discs. Well done!
Thank you for your comment.
こんな磁石の使い方があったんですね！
他でも直線運動を回転運動に変える機構で応用出来そうなアイデアだと思います。
コメントありがとうございます。
ピストンがまだ上昇中にディスペーサーが下降し始める、この時間差がシャフトの回転方向と無関係であるというのが面白いですよね。
Excelent, very clever and very simple, thank you for shearing your project. I'll try one !! Thanks again, from Argentina
Thank you for your comment.
Very cool! This is a the best and Clear Stirling Tutorial! Thanks!♡♡♡♡♡
Thank you for your comment.
Wow.. its alway great and wonderful to watch again video of ur sterling engine.. one of the best..!
I also came back to listen to ur background music.. it's so calm..!
I always comes back here just for the music and the enjoyment of watching ur DIY..
Btw, I built 3 of it.. but one didn't work.. not sure what's the problem is though it's the same exact calculation.. hihihi.. and none of the children succeeded.. lol.. but they did enjoy watching the two models I've made and left it at their school..! The school is the 1st and the oldest built and sponsored by Jica of Japan and built according to the specification of Japanese kindergarten in my country.
Tqtqtq very much for ur awesome project.. and I do wish that ur in the very best of health at all times.. God bless u always Sir..!
Regards from Malaysia..!
😁😁😁.. have a wonderful days ahead..
Thank you for watching my video and for your comments.
I take my hat off to you sir. I was spell-bound watching your solutions to engineering problems so that you could make use of discarded materials (e.g. old hard drives). I am curious what the phase relationship between the displacer and the drive piston.
Very impressive engineering. Thank you for sharing.
Thank you for visiting.
The phase relationship is that the displacer rises at 30 degrees before reaching bottom dead center, and the displacer falls at 120 degrees before reaching top dead center. (7:45)
@@yattemita4447 Thank you. It's a beautiful engine.
Brilliant.
My next shop project.
Thank you.
Thank you for your comment.
Great video great engine nice and easy to follow thank you keep up the great work
Thank you for your comment.
This os just brilliant, thank you. Will try to build one.
Thank you for your comment.
@@yattemita4447 have you thought about building a bigger version?
No, I don't.
Best homemade stirling engine with simple design.👍
Thank you for your comment.
It is a great engine and well explained. I must also appreciate your replies to almost every comment made. Take a bow. 🙏
Thank you for watching and commenting.
Thanks for uploading video very interesting I never knew that Stirling engines had magnets!!!!!!
Thank you for your comment.
I think it is a very ingenious way to avoid a dedicated mechanical link to the crankshaft to move the displacer 🙂
Wow, that is amazing and perfect!!
Thanks alot buddy.
Thank you for your comment.
Awesome project!!
Thank you for your comment.
You are very clever and smart. Thank you for sharing.
Thank you for your comment.
This video is made so well ! Explanation was very good ! Thank you for sharing this 💯
Thank you for your comment.
Felicitaciones, un lindo motor, muy ingenioso.
Saludos cordiales desde Quito Ecuador.
Thank you for your comment.
C'est bien . C'est propre , c'est claire kom montage . Pas l'air d'être très compliquer a faire.
Merci pour la vidéo .
Thank you for your comment.
Nice engine!
Thank you for your comment.
👍I've been tried and succeeded, thank Sir for your idea 🙏
I'm glad you succeeded.
thanks for the video!
thank you for your comment.
Congratulations, a perfect finish for your engine and it works very well.
I also found the materials you used easy to access interesting.
Leandro Wagner.
Thank you for your comment.
Oh!! It's very very well done, I'll try some. I've much of old hard disk. Thank you for the great example. ^_^
Thank you for your comment.
This is really a wonderful project.. and if included all parts and measurements, it'll be really great project to build one myself..! Waiting for the tutorial.
Thanks, I really enjoyed the video and the music too..
Regards..!
Thank you for your comment.
yattemita３２５
I'm trying to build one for the pre school childrens' coming project to encourage them.
I have the HD disc.. could you kindly tell me the height of the pole, the displacer and the plastic bottle for the displacer's chamber..
My calculations for the pole is 7.5mm, displacer's diameter is 46mm, piston rod length is 5.5mm, plastic bottle height is 3mm and the ring to cover the disc hole is 3-3.5mm..!
Really hope the next video of yours all measurements would be labeled..
Thank you so much for the idea and hope you'll be able to assists me with the measurements.
Regards..
The height of the aluminum channel pole is 65 mm.
The displacer has a diameter of 80 mm and a thickness of 15 mm.
The length of the piston rod is 35 mm.
The diameter of the plastic bottle is 90 mm, the height is 18 mm.
The diameter of the brass ring covering the hole of the disk is 35 mm.
@@yattemita4447
Wow., that's very kind of you to fast reply me together with the measurements required.
I really appreciate all the efforts taken..
I also might use your ideas on simple projects for the children to build..
Thanks again for all help, ideas and projects..
God bless you always.
Regards..
Thank you very much.
You are welcome.
Thank you for your interest in my videos.
O cara é fera, parabéns 👏 👏👏👏
Thank you for your comment.
One of the simplest and most elegant stirling mechanisms. Do you think the magnetic drive is less efficient than a mechanical one?
Thank you for your comment.
I'm not sure about efficiency.
Very impressive. How much clearance is there between the piston and the cylinder? It looks like it is looser than I would have expected.
Great job!
I don't know how much clearance I have. When the piston is free, it will fall in about 5 seconds.
Guruji excellent God bless you and your family
Thank you for your comment.
Vary nicely made and running engine. It would have be nice if you had included dimensions of all pieces.
Thank you for your comment.
The dimensions are
PET bottle diameter 90mm, height 18mm
Displacer diameter 80mm, thickness 15mm
The piston diameter 18mm, length 20mm
and length of the piston rod is 35 mm.
The vertical movement distance of the piston is 9 mm.
Neodymium magnet 6mm diameter, 2mm thick
The height of the aluminum channel pole is 65 mm.
The diameter of the brass ring covering the hole of the disk is 35 mm.
I like the idea using the magnets. I dislike trying to make another good performing low-displacement sealed compliance from common materials. Good job 👍
Thank you for your comment.
Que puedo decir estas culturas son milenarias se han caracterizado por ser inteligentes y tener una infinita paciencia
Thank you for watching.
Es usted el rey de la paciencia👏👏👏🇺🇾
Thank you for your comment.
Good engine😀
Thank you for your comment.
Vow! Well-done!
Thank you for your comment.
nice work. nice video.
Thank you for your comment.
Molto educativo
The idea of moving the displacer with a magnet is great!. The weak point is the sealing of the piston. How did you adjust it?
Thank you for your comment. The piston use a cap of adhesive. It was a little tapered, so I cut it little by little to fit the cylinder.
@@yattemita4447 o
Hardest part of this is the piston what did he use?
Very nice build
Thank you for your comment.
I used the adhesive container cap for the piston.
とても良い感じですね！
それにしても、音はどこから発生しているのでしょうか？
ディスプレーサがあたっている音ですかね。はっきりとは分かりませんが。
Interesante, buena idea. Gracias por compartir
Thank you for your comment.
Is this able to reverse because the phase angle between the displacer and drive-piston is loosely coupled via magnet and therefore only determined at runtime? Very clever!
Thank you for your comment.
Depending on the direction of rotation that starts first, it can rotate in either forward or reverse rotation.
Hello Mr. Yattemita.
I found your video and design very inspirational. I was impressed by the minimalist approach and the very clever use of epoxy. I am thinking about adapting some of your ideas and modifying them by replacing the aluminum posts with 3d printed components for my design.
At first I was very excited because at first I thought the top and bottom where CD or DVD's (of which I have many hundreds), but then I realized from reading the many comments that those are made from aluminum that have a much higher heat conductivity than polycarbonate.
Are those disks from a hard drive?
For my design I plan to use a CD for the flywheel, since I have many of those.
I found you piston design very interesting as well. At first I considered using to a glass tube with graphite piston, but your approach is making me re-think that there are other possibilities.
Have you add issues with the piston leaking over time? Is there any lubrication on the piston/cylinder?
ありがとうございました
Thank you for visiting.
Those discs are from the hard drive.
Please note that some hard disks are made of glass.
For now, the piston does not leak.
No lubricant is used on the piston / cylinder.
Todos os japoneses são pacientes, inteligentes e habilidosos assim como o senhor !? Essa é a ideia que fica. Porque o ocidental vai dizer que isso é truque !! He he.
Thank you for your comment.
exacto jajaj
This is an example of the principles of the Aeolipile made by Heron of Alexandria.
Thank you for your comment.
Wow! A wonderful invention? What is the function of the magnets? I don't understand how the magnets help the engine work.
The displacer is moved up and down by the power of the magnet.
Thank you! That is a better idea than a balloon.
Thanks for an interesting video. Do you have a list of the materials and the dimensions and / or a drawing please?
Thank you for watching.
There are no drawings.
The dimensions are
PET bottle diameter 90mm, height 18mm
Displacer diameter 80mm, thickness 15mm
The piston diameter 18mm, length 20mm
and length of the piston rod is 35 mm.
The vertical movement distance of the piston is 9 mm.
Neodymium magnet 6mm diameter, 2mm thick
The height of the aluminum channel pole is 65 mm.
The diameter of the brass ring covering the hole of the disk is 35 mm.
Thank you for your
Thank you for your comment.
สุดยอด
Hello
Very good job
Can you share another video for beta type sterling engine using candle light
Thank you for watching.
Excellent interesting idea , tutorial and job!
Please can you mention the specifications and dimensions of the two neodymium magnets.
In all reactions and answers I cannot find them.
Best regards from Holland, Stirlingmodels, Huib Visser.
Neodymium magnets have a diameter of 6 mm and a thickness of 2 mm. The magnetic flux density is 220 millitesla.
Very nice project! What is the gap between the piston housing and the piston?
Where is the piston housing?
Is it a hard disk?
I can't understand the meaning of the question.
@@yattemita4447By piston housing, I mean the plastic pipe
I understand. The diameter of the piston is 18mm. The diameter of the plastic pipe is 88mm and the height is 17mm.
すごいですね。
コメントありがとうございます。
Just. Amazing
Thank you for your comment.
🔴 イスラームとは唯一の真の神であり創造主へと従うという意味だ。
🔵ムスリムは創造主である唯一の真の神へ従う者だ
🔴 我々は唯一の御方、創造主、真実の神（アッラー）のみを崇拝しなければならない。
Eres un genio so te ha se falta medir la cantidad de vol que pué produsir
Thank you for watching.
Very nice! Wonder if it would work with a spring lifting the sponge and repelling poles pushing it down
Thank you for your comment.
I've never used a spring so I don't know if it works.
It wouldn’t. The oscillation of the piston and displacer need to be 180 degrees out of phase. However the addition of a weak spring above the displacer would allow the engine to run in any orientation.
Thank you for your comment.
@@kyleeames8229 90 degrees. and with some hysteresis it's better
Muy bueno, 👍(espero que no tenga un motor eléctrico escondido)
Thank you for your comment.
There is nothing hidden.
Excelent thx.
Thank you for your comment.
Thank you for your wonderful design. I built 1 Sterling engine. It ran, but it was not as good as yours. I will be building one with your design. Can 1mm aluminum be used instead of hard drive discs?
Thank you for inspiring many to build Stirling's.
Ed
Thank you very much for seeing it.
I think it would also work on an aluminum plate.
Muito show, very good
Thank you for your comment.
シリンダーが一つで済むのはいいな
コメントありがとうございます。私も構造が簡単で作りやすいと思って作りました。
@@yattemita4447 よろしければ寸法とかも詳しく教えて頂けませんか？
主な寸法は次の通りです。
ハードディスクの直径は９４mm、ピストンの直径は１８mm、ピストンの行程は８mm、ディスプレーサの入っている容器の直径８８mm高さは１７mm、 ネオジム磁石直径６mm厚さ２mm
@@yattemita4447 ありがとうございます！
今後の参考にさせていただきます
Waw ! Good very good
Thank you for your comment.
Nice
Thank you for your comment.
Good invention. 👌👏👏👏
If the water get cold will it work Continuesly ?
For copper pipe can we use plastic pipes like pen? Please reply
Thank you.
Arul Jose : from Tamilnadu, South India.
The rotation stops when the water gets cold.
Unfortunately, I haven't done anything about copper pipes, so I don't know.
Great
Thank you for your comment.
Bom trabalho gostei.
Thank you for your comment.
Muy bueno
Thank you for your comment.
Sir that hard disc made from plastic or brass ?? Because they shining to much , and how much clearence between power piston and cylinder , and how much clearence between displacer piston and outer wall ( plastic bottle ring) please reply
Hard disc is made from aluminum.
The gap between the power piston and the cylinder is not measured, but it is made to move lightly with little air leakage.
The gap between the displacer piston and the plastic bottle ring is about 5 mm.
Thank you for watching.
Sir 5 mm whole around outer displacer or example if 45 mm outer diameter of displacer and 50 mm inner diameter of plastic bottle ring ???
The inner diameter of the plastic bottle ring in the video is 90 mm, and the outer diameter of the displacer is 80 mm.
Молодцы! Привет! Из России! - ДАЛЬНИЙ ВОСТОК!
Thank you for your comment.
なるほど、この構造ならコネクティングロッドが1つで良いのか……
ご覧頂きありがとうございます。
すみません コメント失礼します
私は高専生で自主探究活動としてスターリングエンジンについて研究しようとしているのですがこのアイデアを研究に生かさせてもらっても大丈夫でしょうか？
このタイプのスターリングエンジン（磁石を使ったもの）は多くの方が動画で紹介してあります。私独自のものではありませんので、自由に研究して下さい。もっと良い物が出来るといいですね。
@@yattemita4447 返信ありがとうございます！
より良いものができるように研究頑張ります
What is the need for hot water, please? Thank you for your service.
Hot water is needed to warm the air in the cabinet made of hard disks.
Muy bueno, ahora, supongo que con el imán no hace falta la cámara de enfriamiento. Y no hay subtítulos
Thank you for your comment.
El iman es distinto a la camara de enfriamiento , en este modelo de hecho no lleva camara de enfriamiento
Động cơ mới lạ hay quá 👍
Thank you for your comment.
Muito legal seria se pasase as medidas para os acompanhantes
Thank you for visiting
なるほど、ディスプレーサに繋がるクランクの代わりに磁石を利用したのか。考えたものだな……
コメントありがとうございます。
Sir I try many time but not working , can you explain what was my mistake ??? I'm not using plastic bottle even I use 90 mm thick pvc pipe is that my mistake ?? Or something else ?
I don't think there is a mistake in PVC pipes. However, I think it is difficult to adjust because the movement of the displacer cannot be observed.
Класс. Браво
Thank you for your comment.
Nice I'm trying it but not working , sir how you make block piston of this engine
The diameter of the piston is 18 mm.
The piston and cylinder are made to move lightly with little air leakage.
good
Thank you for your comment.
I have thought of magnetic ones long ago but lol I didn't even make one
Thank you for your comment.
Please Sir could it be used to generate electricity to power leds?
Please what types of magnets were used?
I don't know if it can generate electricity.
The magnet is a neodymium magnet with a diameter of 6 mm.
Fantastoc
Thank you for your comment.
Great. It seems there is a small hole in the piston. Am I right?
Thank you very much for watching.
There are no holes in the piston.
If there is a hole, air will leak.
@@yattemita4447 Thanks. What is the maximum displacement of the piston? I mean the distance between the upper and lower position of the piston
The maximum displacement of the piston is 9 mm.
@@yattemita4447 Thank you
Myfordboy master of Stirling engine
Thank you for your comment.
👍🇨🇴😁por favor un tutorial como hacer ese taladro del vídeo gracuas saludos desde Colombia
Thank you for your comment.
Which material you use for making displacer piston
The displacer material is a closed-cell sponge.
But the displacer is no connected to the crank.how it is?
It is moved using magnetic force.
👍👍👍
ご覧頂きありがとうございます。
👍
ご覧頂きありがとうございます。
初めまして、空中浮遊独楽の作り方を見ていてUP主様の他の動画にも興味があり見入ってしまいました。
私も物作りが好きなのですが、UP主様のような知識が無いのでいつも失敗ばかりしています。
物作り動画をもっと見たいので頑張ってください。
ちなみにですが、動画内で使用されている万力や小さなボール盤などもUP主様の自作なのですか？
もし、そうなら自作の工作道具などの作り方動画などをUPして頂きたいです。
動画をご覧頂きありがとうございます。
ちょっと加工するのに便利なものをいくつか作って動画にUPしています。
以下のものをUPしていますのでそちらもご覧ください。
発泡スチロールカッターの製作 th-cam.com/video/W-uS3YuFBc8/w-d-xo.html
ミニボール盤の作り方 th-cam.com/video/KremkBP1c9k/w-d-xo.html
古いHDDからディスクサンダーを作る th-cam.com/video/7vHfUO574i4/w-d-xo.html
やってみた のこぎりガイドを作ってみた th-cam.com/video/DBfqNDw8g08/w-d-xo.html
Can I use styrofoam instead of sponge
I think it is possible
いいな 頭 が じょうず
コメントありがとうございます。
そうです。。。。。私 は その 仕事 を やりたい。。。 先生 は 日本 に なに を しますか
Excelente video compañero puedes traer más videos así :)
Thank you for your comment.
Действие двух сил. Отдалённо напоминает работу гидроудара механизма для закачивания воды.
Thank you for your comment.
MUITO BOM
Thank you for your comment.
@@yattemita4447 subscribe
Which thing you use for displacer piston , please reply back , can I use motorcycle air filter foam to make displacer piston ????
Unfortunately I don't know.
The displacer material is a closed-cell sponge.
Meance I can use any kind of sponje
Please try.
I trying to make it but not working , can I use bikes air cleaner cution ??
What is a bikes air cleaner?
Thank you for watching.
Motorcycle air filter ,
Can I use an ordinary CD for the chamber?
Since CD is made of plastic, it does not know whether it works well because the heat transfer is worse than that of hard disk aluminum. Use metal if possible.
Thank you so much Sir for the reply, I really appreciate your help.
Are the magnets attracting or rejecting each other? Do they have to be very strong?
Magnets attract each other.
The magnet is a strong neodymium magnet.
Yes. But they are also loosing energy so the weaker the better.
@@christomold3142 Aaah thanks, really didn't know that. I tried it before but it didn't work, maybe I should try again! Thanks :)
Sir,if i change that piston to ballon,can it be?
Although not impossible, I think it is difficult to adjust the position where the displacer moves up and down.