@thomasstunts If you could sandwich some sort of insulating material between two lids that would probably be better. The displacer should occupy about 2/3 of the volume of the cylinder.
@thomasstunts the tube is s rolled-up pop can used as a smoke stack to carry excess heat away. Keep in mind that heat rises and if you have no shielding for the hot side and no provision for cooling then the heat from the fire will quickly heat the whole can and likely prevent the engine from running at all.
Hi, I have an important question. I am making one of these engines, and my balloon piston has turned out to have a shorter stroke than the displacer. Can the crank for my piston be smaller than the displacer? I'm also wondering what the diameter of the displacer piston should be relative to the displacer cylinder.
@questionablesight The piston stroke on my engines is half the length of the displacer stroke usually, so that shouldn't be a problem. I've never actually used a displacer piston in my engines, only steel or stainless steel wool, but I believe in general that you shouldn't have more than about 1 mm. of clearance there.
@approtechie Sorry, I have one more question. Even though, ideally, the displacer should not conduct heat, my only option is a metal can lid. Will that function?
thanks for replying so fast! dont know how you made it with out that second piston on the side im gonna keep trying and maby if i dont get it tonight ill check the library and see if they have any plans there
how the hell did you make that? i have been trying for 2 days to make one but i cant find the right plans i am making mine with a can base and then the rest with soda cans like yours. can you please help me and tell me where you got the plans for making it. thanks
No plans, I did it on my own. I used 3 soda cans - 1 at the bottom is the working cylinder, hot on the bottom, water cooled on the top, with 0000 steel wool as a moving regenerator inside. Can 2 has a circle of bicycle inner tube replacing its bottom and superglued to the lip. Bottle cap is glued to the rubber, holds the brass rod guide in place. Can 3 has bushings glued in for the crank. 1.5" displacer stroke, .5" power stroke. Cans 1,2 are spot superglued then sealed with red RTV. Good luck!
hiya. do you have any instructions to make this? ta.
simonearly 1 month ago
what is the tube jutting out the back and would it be important to have one if i made an engine without the cooling water tank?
thomasstunts 2 months ago
@thomasstunts If you could sandwich some sort of insulating material between two lids that would probably be better. The displacer should occupy about 2/3 of the volume of the cylinder.
approtechie 2 months ago
@thomasstunts the tube is s rolled-up pop can used as a smoke stack to carry excess heat away. Keep in mind that heat rises and if you have no shielding for the hot side and no provision for cooling then the heat from the fire will quickly heat the whole can and likely prevent the engine from running at all.
approtechie 2 months ago
@approtechie so your personal recommendation would be to at least have the exhaust pipe, should i choose to not make the water tank?
thomasstunts 2 months ago
@thomasstunts Yes, you should at least try to get the heat away from the cooling section somehow.
approtechie 2 months ago
Hi, I have an important question. I am making one of these engines, and my balloon piston has turned out to have a shorter stroke than the displacer. Can the crank for my piston be smaller than the displacer? I'm also wondering what the diameter of the displacer piston should be relative to the displacer cylinder.
Thanks, Matthew Cohen
questionablesight 2 months ago
@questionablesight The piston stroke on my engines is half the length of the displacer stroke usually, so that shouldn't be a problem. I've never actually used a displacer piston in my engines, only steel or stainless steel wool, but I believe in general that you shouldn't have more than about 1 mm. of clearance there.
approtechie 2 months ago
@approtechie Thanks a lot! I am under a lot of pressure, I am giving this to my gruff grand-father who is a very accomplished mechanical engineer..
questionablesight 2 months ago
@questionablesight Good luck! I bet he'll love it!
approtechie 2 months ago
@approtechie Sorry, I have one more question. Even though, ideally, the displacer should not conduct heat, my only option is a metal can lid. Will that function?
questionablesight 2 months ago
yea a tutorial of putting it together will be better than text. I made one but it's not working
ulujm 5 months ago
can u make a tutorial
yoyohoes 1 year ago
thanks for replying so fast! dont know how you made it with out that second piston on the side im gonna keep trying and maby if i dont get it tonight ill check the library and see if they have any plans there
porkypinekiwi 2 years ago
how the hell did you make that? i have been trying for 2 days to make one but i cant find the right plans i am making mine with a can base and then the rest with soda cans like yours. can you please help me and tell me where you got the plans for making it. thanks
porkypinekiwi 2 years ago
No plans, I did it on my own. I used 3 soda cans - 1 at the bottom is the working cylinder, hot on the bottom, water cooled on the top, with 0000 steel wool as a moving regenerator inside. Can 2 has a circle of bicycle inner tube replacing its bottom and superglued to the lip. Bottle cap is glued to the rubber, holds the brass rod guide in place. Can 3 has bushings glued in for the crank. 1.5" displacer stroke, .5" power stroke. Cans 1,2 are spot superglued then sealed with red RTV. Good luck!
approtechie 2 years ago
@approtechie That is the strongest soda can stirling Ive ever seen, great job!
AntonBowie 1 year ago
awesome
LegionOfAngels1 2 years ago