Gallery, Projects and General > Project Logs
The Return of No. 83, a Hot Air Engine
vtsteam:
Hey Tom! :beer: Any particular project in mind?
vtsteam:
Finally, No 83 runs again. :ddb:
And quite strongly, too. I've got to find my tachometer and see what it's doing.
awemawson:
Excellent save there Steve, well done !
vtsteam:
Thanks kindly, Andrew! :beer: Any new projects on the horizon for you? :coffee:
vtsteam:
Found the optical tach. Had to charge some penlight batteries for it, but it's working.
So, 800 RPM on No. 83, which is gratifying to see. It 's an impressive running engine. That flywheel is pretty massive, and it's fun watching it slowly come up to speed and then maintain that rate. It does seem to take nearly 5 minutes of heating (using sterno) before it will start, which seems kind of long. I'm not sure why it shouldn't start sooner. Maybe the thicker wall of the new displacer cylinder. I think I'll make another one.
Well anyway, she's running well now and I'm happy! All these years I wondered about it :scratch:
I keep running it, then stopping for an hour or two, then starting it up again just to see it go. It's just fun!
Top RPM is very consistent at about 800 each time.
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