Robinson Hot Aire engine running

[Tom Jamboretz]

I have just finished making a Robinson hot aire engine from castings I bought from Polly Model Engineering in the UK. It was touch an go trying to get it running. Mostly from air leaks I could not find easily. It runs very nice now. Attached is a recent photo. The thermo siphon tank is 4" x 4" . It is running on propane made form a torch. TJ

 

[Longboy]

I find that pressurizing the cylinders through the transfer port between hot and cold sides with a blow off nozzle from a compressor set at low psi reveals the internal leakage area.

 

[deverett]

Good job, Tom. Now to get back to mine!

Dave
The Emerald Isle

 

[Hopper]

Good job indeed. You've done well - they are notoriously "testing" to get running right.

 

[Tom Jamboretz]

Good idea about pressurizing to find leaks. I'll try that when it stops performing. TJ