You've got way to much friction. With the heat of a torch, it should run at least 1000 rpm. I made a smaller version that runs off an alcohol candle that tops of at 1600 rpm. Check out my videos. Don't use oil as a lubricant. Way to much drag. Graphite works great. Polish any of the sliding surfaces like the rods, ball bearings instead od plain ones, and don't have leaks.
the inneficiency is inherint in the concept of a stirling engine, The relative temperature difference with respect to absolute zero is too small for any practical amount of work to be accompished. to turn a big wheel like this is actually pretty good for a stirling engine.
i also made one and the efficiency was very bad where does all the inefficiency come from is it just the friction? or is it the piston perfection as well which lets air out?
You're heating one end of the can and cooling its other end. You should heat the can and cool the copper piston. Otherwise, most of the heat just flows from one end of the can to the other.
My guess is it has a bit too big clearance between the displacer piston and cylinder, should not be more than 3-5mm or 1/6 or so.
Con.rods and bushings looks great as do the power cylinder, so with a better displacer assembly this thing would probably reach 600-1000rpm on that amount of heat.
somtin' wrong with design
vincent7520 8 months ago
the shaft and the wheel is too heavy for the power of a Stirling engine with these dimensions
3carloscruz 1 year ago
Looks pretty cool great job TAKE CARE
michael970 2 years ago
You've got way to much friction. With the heat of a torch, it should run at least 1000 rpm. I made a smaller version that runs off an alcohol candle that tops of at 1600 rpm. Check out my videos. Don't use oil as a lubricant. Way to much drag. Graphite works great. Polish any of the sliding surfaces like the rods, ball bearings instead od plain ones, and don't have leaks.
timkowalik 2 years ago
the inneficiency is inherint in the concept of a stirling engine, The relative temperature difference with respect to absolute zero is too small for any practical amount of work to be accompished. to turn a big wheel like this is actually pretty good for a stirling engine.
Zetune79 2 years ago
Comment removed
themanbearpig 2 years ago
Stirling Engines can be more efficient and as powerfull as and diesel engine.
acerkiwi 2 years ago
But it does works
joliteal1 3 years ago
0.1% Efficiency
TimpBizkit 3 years ago 12
Can't argue with that!
james9149 3 years ago
i also made one and the efficiency was very bad where does all the inefficiency come from is it just the friction? or is it the piston perfection as well which lets air out?
shorty40merza 2 years ago
@TimpBizkit Jajaja :D
IQmaza 1 year ago
@TimpBizkit
0,001
superfelixRC 1 year ago
I can't find clear instructions please help me find some simple instructions
yourroaddog 3 years ago
You're heating one end of the can and cooling its other end. You should heat the can and cool the copper piston. Otherwise, most of the heat just flows from one end of the can to the other.
nemo1620 3 years ago
0.too much friction
richardebbole 4 years ago 5
Neat engine, but with as much heat as you are pumping into it...it should be flying..did you check to see if you have any air leaks?
IronGoober 4 years ago
That engine is in no hurry to get anywhere..
My guess is it has a bit too big clearance between the displacer piston and cylinder, should not be more than 3-5mm or 1/6 or so.
Con.rods and bushings looks great as do the power cylinder, so with a better displacer assembly this thing would probably reach 600-1000rpm on that amount of heat.
Keep up the good work!
stirlingswede 4 years ago
Very cool design. Is your power piston made of graphite?
fuzzymonkey777 4 years ago
No, it's brass. The tube is 42 mm OD copper. Seal is maintained by oil, but might try coating with solder then machining down for a closer fit.
james9149 4 years ago