Stirling engine-generator

This was a fun project, although not finished completely.  It has a 1 inch bore and a 3/4" stroke.  The flywheel/magnetic rotor is just under 6 inches, stands 14 inches tall and 11 inches wide.  Has a hand wound 3 phase alternator with a homemade rectifier.  Using a candle as the heat source will make about 4.5 Volts and enough power to light 10 ultrabright LED's or a string of 36 3volt Christmas lights.  Using an alcohol burner will produce over 8.5 volts and will power as many as 75 ultrabright LED's.  Using a propane torch it will charge a 12 volt battery.  The picture shows it running on alcohol ( small homemade burner) making over 8 volts open voltage....

I've charged ni-cad batteries with it while experimenting.  It doesn't take a massive amount of heat to run it as it will run on boiling water.   About 130 degree difference.  It runs fairly smooth up to around 800 rpm and is very quiet.  I've had it running at over 1100 rpm but it doesn't really like that.   The clearances are pretty close and you can hear the displacer piston making a ticking noise at that speed. Below are other angles of the motor/generator.....

This is a "Ross Yoke" set up where both the displacer piston and power piston share a common crank throw and offsets the two pistons by approx 90 degrees....

Above is the "hot end" made from a stainless steel cup and aluminum housing....

Above is another angle of the stabilizer rod to the yoke....