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Ante, thanks for sketch - but it's still hard to understand - can you please mark with green circle static points and with yellow colour points of arm connections (displacer and working piston) - you could mark direction of arm movement with yellow arrow. As Ian mentioned displacer movement should b...

Thanks Ante, I made a video of corrected crank geometry (as GeofV suggested), please see video at new crank (also includes displacements chart of touch points of displacer and working piston). Now displacment ratio of both pistons is aprox 1:3 (see attached chart) - Ante is this the same like volume...

Geoffv, thanks, ok I understand now. Is there any method beside the practical test, to calculate right displacer and piston displacement? If I assume right it depends on temperature ratio, medium, working pressure etc. Is calculator at Stirling calculator worth of spending money? But lets say for 10...

Thanks guys for constructive comments, and as geoffv already guessed I hadn't have luck today witth running engine (I have put some more videos where I trained muscles :razz: starting beta stirling without success ). It seems at the end of half an hour heating the front of inox cylinder didn't heat ...

Hi everybody, I'm putting effort and time to make this beta stirling to work. Finnaly I made it all way to flywheel, that is pretty heavy (around 30kg). Working piston is prety big (250mm). Please feel free to check my gallery at: [album] BigBetaStirling gallery [/album] big beta stirling[/url] advi...