10 watt DIY Stirling engine,1685 rpm!

I’ve been working to raise the speed of this little engine and checking that it will cope with the increased stresses. This video shows that it can take it. I’m running it on a Bunsen burner hooked to a propane bottle to be able to run the heater head red hot. Water is circulating through the cooling jacket from a tiny pump. I had cut the base off so placed steel wool pads under the legs to absorb any vibrations. I’m pretty pleased with how this engine is doing and I’m thinking it’s about maxed out. Next step - to measure the power output. [Update: max power = 10.4 watts @ 1000 rpm, measured on the shaft; Max torque = lb-in. @ 540 rpm]