Nice work Mike, can't believe you can get 180rpms out of a couple of cat food cans! Impressive work, when you explained it to me I thought that the bottom can was the vessel for the heat? or was this just for testing purposes?
Great design man, very original. I also appreciate your comments on the other inquiries, they helped me a lot! I was wondering though, what's the clearance between your displacer and the pressure vessel?
Thanks for your compliments. Happy to help if I can. Displacer Piston has about 3mm clearance all around from cylinder wall. Displacer Cylinder is a steel can: 11cm(H) x 7.2cm(inside dia). Displacer Piston is 6cm(H) x 6.58cm(dia). D-Piston bottom is half a steel can. D-Piston top is half an Aluminium soda can pushed tightly over bottom can. D-Piston is hollow & not sealed. D-Piston bottom has a rim (steel-can part) which is 6.78cm & will just fit into the cylinder can.
Thanks there buddy! Nice to be appreciated. I try to be original. I'm slowly working on a very big one (44 gallon drums etc.). I'm in the 'aquiring materials' stage.
Me thinks NASA's already on to that one & they've got more funding than me. Although I can't be far off since that African Prince is gonna put all that money in my bank account! -I'll look into it.
after watching several sterling engines, i have noteced the cooling chamber where the piston is, is always smaller and does not go far up or down compared to the heat chamber piston which is usually 2 to 3 times bigger than the other one. is this nessecary? look at the crank too, it has one big U and a small u
It is USUALLY necessary. It's due to the fact that the air you are working with, only expands/contracts by a small percentage of its original volume. The amount of volume change with which you can work a piston is dependant on
a)The volume of air you are heating/cooling
b)The temperature difference between the hot end & the cold
These things will govern your piston design.
Now for THAT volume change, you can have either a narrow piston with a long stroke, or a fat piston with a short stroke.
I could've designed my engine with both bends in the crank being the same size but it would've meant that my displacer piston would need to be much taller(so it moves a lesser distance to shift the air from the hot end to the cold) & the power cylinder/piston would've needed to be narrower (because of less air inside therfore less expansion/contraction to work with). Less power overall!
Thanks for the compliment. I have seen your videos too. You are making one also. Other people have given you good comments. If you keep trying, you will get one working soon. It is important to understand how they work. Good luck.
Nice work Mike, can't believe you can get 180rpms out of a couple of cat food cans! Impressive work, when you explained it to me I thought that the bottom can was the vessel for the heat? or was this just for testing purposes?
~Danz
Danzzigger 1 year ago
Great design man, very original. I also appreciate your comments on the other inquiries, they helped me a lot! I was wondering though, what's the clearance between your displacer and the pressure vessel?
geforcemmx2000 2 years ago
Thanks for your compliments. Happy to help if I can. Displacer Piston has about 3mm clearance all around from cylinder wall. Displacer Cylinder is a steel can: 11cm(H) x 7.2cm(inside dia). Displacer Piston is 6cm(H) x 6.58cm(dia). D-Piston bottom is half a steel can. D-Piston top is half an Aluminium soda can pushed tightly over bottom can. D-Piston is hollow & not sealed. D-Piston bottom has a rim (steel-can part) which is 6.78cm & will just fit into the cylinder can.
rmxmike 2 years ago
Thanks there buddy! Nice to be appreciated. I try to be original. I'm slowly working on a very big one (44 gallon drums etc.). I'm in the 'aquiring materials' stage.
rmxmike 3 years ago
G'day Mike, this thing is unreal. Well done.
I wonder if you could make one to work in space and make power?
vk3ukf 3 years ago
Me thinks NASA's already on to that one & they've got more funding than me. Although I can't be far off since that African Prince is gonna put all that money in my bank account! -I'll look into it.
rmxmike 3 years ago
after watching several sterling engines, i have noteced the cooling chamber where the piston is, is always smaller and does not go far up or down compared to the heat chamber piston which is usually 2 to 3 times bigger than the other one. is this nessecary? look at the crank too, it has one big U and a small u
TheHermeticAlchemist 3 years ago
It is USUALLY necessary. It's due to the fact that the air you are working with, only expands/contracts by a small percentage of its original volume. The amount of volume change with which you can work a piston is dependant on
a)The volume of air you are heating/cooling
b)The temperature difference between the hot end & the cold
These things will govern your piston design.
Now for THAT volume change, you can have either a narrow piston with a long stroke, or a fat piston with a short stroke.
rmxmike 3 years ago
I could've designed my engine with both bends in the crank being the same size but it would've meant that my displacer piston would need to be much taller(so it moves a lesser distance to shift the air from the hot end to the cold) & the power cylinder/piston would've needed to be narrower (because of less air inside therfore less expansion/contraction to work with). Less power overall!
Hope this helps!
-Cheers!
rmxmike 3 years ago
great work
1crazyfocker 3 years ago
great stirling. I try to make one but it dont run.(sorry for my english)
ComanChristian 3 years ago
Thanks for the compliment. I have seen your videos too. You are making one also. Other people have given you good comments. If you keep trying, you will get one working soon. It is important to understand how they work. Good luck.
rmxmike 3 years ago