Stirling Engine Requirements

[Blair DixonParticipant @blairdixon12872]

Hi All,

I'm working on making a model cart powered by a stirling engine, much like this one **LINK**

However I'm struggling to find consistent information around required tolerances for the fit of each piston/cylinder. E.g. whether they should be airtight or frictionless.

I've tested a few different set ups, with and without an o-ring, but have not had any success in getting the engine to run.

Any help is appreciated. Thanks

[Blair DixonParticipant @blairdixon12872]

Trying to make a model stirling engine cart

[JourneymanParticipant @journeyman]

Small Stirling engines have a very low power output and require almost frictionless construction both in cylinder fit, bearings and in fact all moving parts. To answer your direct question the power cylinder fit should be both airtight and frictionless. The displacer however is a clearance fit in it's cylinder. Plenty of books about, search for James Rizzo or Roy Darlington both have written good books. Start with a stationary engine before trying a vehicle, getting enough power to drive something is a challenge. O-rings on any moving part will probably give too much friction.

I have made several engines with limited success one of my efforts on Journeyman's Workshop this is about the simplest and easiest engine to start with.

John

Edited By Journeyman on 07/01/2020 08:50:39

[Author]

Posts