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I don't have a copy of Rizzo's book. Would it be possible for someone who has it to scan and post the picture? does anyone have a photo of their own torque measurement device? What values of torque are you all getting from your tin can engine?

Good point Ian. My speed was 130 rpm. Is that about normal? Can I ask how you measured the torque? I need to do that with mine but haven't thought of a good method.
Thanks

For the temperatures, I used type K thermocouples. I drilled a small hole in the top and bottom of the displacer cylinder and inserted the tip of the thermocouple into the dead air space between the displacer piston and the displacer cylinder. For the pressure, I drilled a small hole at the base of ...

In case anyone is interested, I measured my tin can engine.

Air temperature inside displacer:
Hot air temp = 275 deg C
Cold air temp = 102 deg C
Gauge pressure in power cylinder:
Contraction stroke = -4 inches of water
Expansion stroke = +3 inches of water

Hello to all. I have built my first tin can stirling engine by following Mr. Boyd's directions (thank you) and after some adjustments, I was able to get it to run. :razz: Next I plan to add some instrumentation to do some analysis (it's for a school project). Has anyone measured the hot and cold air...