Shane, you are a LEGEND, super clean work, passionated guy, non stop upgrading your work and provide us good content about stirling engines, this channel is gold, i hope i can continue to watch your video for a loooong time, i hope you get more popularity , and my dream will be working with people like you on big stirling generators for humanity to get rid of expensive electricity etc... big GG from France.
Rats Shane. Sorry about the diaphragm blow-out. I really like the pony brake and rpm indicator. The engine looks really nice. I wonder how a side wall from a tire would work as a diaphragm? Maybe might not stand the heat. Don't know how hot the hot air gets. Race tires on cars get pretty hot though... Thanks for sharing the good results and the setbacks too. Learning alot from watching your journey. First Rate. - Chuck in Jensen Beach, Florida. Cheers.
That's a nice engine and quite quiet for a Stirling. Now I by no means have any expertise in these but I think for long term use the diaphragms will be a week point. It would be interesting if you devised a piston arrangement 😊 . Look forward to following your progress.
Looking good, just did a quick gargle search and you can buy ready made diaphragm sheet reasonably cheaply, was seeing sheets for around a tenner. having the cloth reinforcement vulcanised in should avoid blowouts I would have thought.
Shane check you just dain it! Love the evolution, not too long n it'll be a suitcase size generator pumping out 3kw. I'd look for and contact a material scientist n see what they could think of for a material for the seal.
After 400c° rubber melts, unless using water jackets or chambers not directly attached to the heat source. Temperature control is everything for performances and durability.
Shane, what a novel way to work out power output. Pity it didn’t actually happen though. Are you still working on the piston wobble, or are you not too concerned? I have been pondering on the watt linkage system to limit the piston wobble issue. If you want me to keep working on a solution, I would need some construction measurements, if you were keen. This would let me work out pivot positions etc. Regards, Brian from NZ.
Maybe use a suspension airbag/airspring? They are meant for heavy flexing... then you could also do away with the flat seal... the airbags usually have plates top and bottom you can cut into
Heat is the issue - even the best polymers are going to be challenged at anything over 150 c - metal foil diaphragms offer up to 400c however they need concentric pressed corrugations not easily duplicated DIY - companies like Hudson may be able to help - where about in UK are you based - do you exhibit at showgrounds - would like to see your engines, have a brew and natter
Hi, Other than the heat issue on the hot seal I'm fairly happy with things so far. I live in Cornwall and exhibit at a few rallies a year. We will plan to go to the west of England show near Helston. Last year there were the best part of 10 full size stirling engines running there, quite impressive! Your always welcome to pop by, cheers
This is possibly a stupid question: Does the rubber sea work against the engine? Presumably it's elastic and the expanding gas has to work against it. Also, it looks like it inflates out at tdc, is that not gas expansion that's wasted on inflating the rubber instead of moving the cylinder?
All alpha designs I've seen have a means of isolating the sealing area from the hot working fluid by distance, insulation or both. Often this will be an extension to the crown of the hot end piston such as a sealed hollow 'can', like a displacer. Were you to incorporate something like that, it would clearly require a longer hot end cylinder and some means of stabilising the piston - perhaps a tail rod and guide would be the simplest.
Great job ❤
(I just knew it will happen on hot side;)
Anyway Your the boss!
The rubber seals are the same shape as a go-kart small tire/tyre sidewall. Cheers, Love your ingenuity 👍
Fascinating work you're doing Shane. Really enjoy watching your skills at work.
"Perseverance" must be your middle name.
Shane, you are a LEGEND, super clean work, passionated guy, non stop upgrading your work and provide us good content about stirling engines, this channel is gold, i hope i can continue to watch your video for a loooong time, i hope you get more popularity , and my dream will be working with people like you on big stirling generators for humanity to get rid of expensive electricity etc... big GG from France.
Sounds like an interesting future project! I'm really just a normal guy with an obsession!
Great job thank you for showing failures also along with successes The tried and true method is coming
Rats Shane. Sorry about the diaphragm blow-out.
I really like the pony brake and rpm indicator. The engine looks really nice. I wonder how a side wall from a tire would work as a diaphragm? Maybe might not stand the heat. Don't know how hot the hot air gets. Race tires on cars get pretty hot though...
Thanks for sharing the good results and the setbacks too.
Learning alot from watching your journey. First Rate.
- Chuck in Jensen Beach, Florida.
Cheers.
That's a nice engine and quite quiet for a Stirling.
Now I by no means have any expertise in these but I think for long term use the diaphragms will be a week point. It would be interesting if you devised a piston arrangement 😊 . Look forward to following your progress.
Looking good, just did a quick gargle search and you can buy ready made diaphragm sheet reasonably cheaply, was seeing sheets for around a tenner. having the cloth reinforcement vulcanised in should avoid blowouts I would have thought.
I'll take a look now! many thanks
So there is no internal one-way valve? Really enjoying your build and thinking of doing the same. Thanks for putting these videos out there!
Sponge cake baking tubs made from silicone may be of interest.
Shane check you just dain it! Love the evolution, not too long n it'll be a suitcase size generator pumping out 3kw. I'd look for and contact a material scientist n see what they could think of for a material for the seal.
Fantastic
Yes this is great a proper dyno
They always run best just before they blow up! 😂
Good job!
Wonder what other material you could use for the teh rubber? Or could you reinforce it?
After 400c° rubber melts, unless using water jackets or chambers not directly attached to the heat source. Temperature control is everything for performances and durability.
Shane, what a novel way to work out power output.
Pity it didn’t actually happen though.
Are you still working on the piston wobble, or are you not too concerned?
I have been pondering on the watt linkage system to limit the piston wobble issue.
If you want me to keep working on a solution, I would need some construction measurements, if you were keen.
This would let me work out pivot positions etc.
Regards, Brian from NZ.
It may be worth trying two vehicle air-brake diaphragms for the seals; they are tough and flexible.
silicone for your pistons can cope very well - good luck friend
I'll give it a go! I've just ordered some : ) cheers
Maybe use a suspension airbag/airspring? They are meant for heavy flexing... then you could also do away with the flat seal... the airbags usually have plates top and bottom you can cut into
I've just taken a look and they look very suitable. My only concern is the heat. I'll measure temp next time to see, cheers
You should have Peter Van Den Berg build a better rocket with you. Faster and better heat input= easier operation.
Yes, his work is great and he has freely published his knowledge on his website. What a great guy
Ok, they are the Next day, you are one Champion, broke prony and ,r.p.m , very good. bay.
Prony brake
Just wondering why there was smoke coming out of the sealed chamber behind the piston ??
You pushed it past the redline!
Just a pity I didn't catch it on film!
Heat is the issue - even the best polymers are going to be challenged at anything over 150 c - metal foil diaphragms offer up to 400c however they need concentric pressed corrugations not easily duplicated DIY - companies like Hudson may be able to help - where about in UK are you based - do you exhibit at showgrounds - would like to see your engines, have a brew and natter
Hi, Other than the heat issue on the hot seal I'm fairly happy with things so far. I live in Cornwall and exhibit at a few rallies a year. We will plan to go to the west of England show near Helston. Last year there were the best part of 10 full size stirling engines running there, quite impressive! Your always welcome to pop by, cheers
This is possibly a stupid question: Does the rubber sea work against the engine? Presumably it's elastic and the expanding gas has to work against it. Also, it looks like it inflates out at tdc, is that not gas expansion that's wasted on inflating the rubber instead of moving the cylinder?
Yes, you are quite correct 🙂, a bit more work to do on this project!
It’s a pony brake. Neato.
All alpha designs I've seen have a means of isolating the sealing area from the hot working fluid by distance, insulation or both. Often this will be an extension to the crown of the hot end piston such as a sealed hollow 'can', like a displacer. Were you to incorporate something like that, it would clearly require a longer hot end cylinder and some means of stabilising the piston - perhaps a tail rod and guide would be the simplest.
Your right! It might be the way the design will need to go. I'll try every available material first : ) Many thanks
На русском языке говорится" Облом". "Кина не будет".
😂😂😂
Мастер!👍👍👍💯