That looks like a decent power output from a little hot air engine
MichaelG.
Thanks Michael, really impressed with the Baker Fan and how well they are working on small stirling and steam engines, these were originally designed by a Mr. A.D. Baker to test steam engines and run them in as they left the factory the Baker Company Factory. From Google A Baker Fan is a simple air-resistance device used run off an engine via a belt and the faster its turned, the harder it is to turn and puts a load on the engine .
They are very good for putting a load on small model steam engines to get them to run at more realistic speeds (not racing) and to get a nicer sound from them from running under a load.