Lamina Flow Stirling Engine 900+ rpm

This single piston stirling engine is a slight modification of the ted warbrooke design, At the piston end I have mounted a heat sink, This provides a long running time, On one baby food jar of metho, it will run between 1.5 to 2 hours, at 900rpm.
Where the flame is positioned, is where the inner pipe and fine steel wool
ends.
End caps are from plumbing/hardware store, SSpipe is also from hardware store, (Railing tube).
Brass inner pipe obtained from hobby shop, I used a cheap blow torch, to silver solder inner pipe to endcap, at the piston end.
The piston, is graphite, (airpot) 16mm in diam. Used J-B weld epoxy to attach glass cylinder to pcb board cut with holesaw, about 6 of them joined together to form the base for the cylinder.

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Science & Technology

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[mrdexp]

Ok more testing reveals that the fine steel wool that is used for cooling within the backend cylinder detoriates with the heat eventually, which slows down the rpms, will look at other materials like ceramics for cooling and resistance to heat.

[boyettewhite]

nice

[mrdexp]

@boyettewhite thanks

[mrdexp]

ok tested with longer backend tube, but runs slower 300 to 400rpm

I have made another single piston engine, same as the one you see here, but this time filled the end cap with SS wool, to narrow down the heat gap within the tube to about 5 to 10mm, this makes it run reliably. As I noticed it would slow down to 700 rpm and then speed up again, so closing the gap is important, concentrates the heat in one specific area.

[leandrojwfolha]

Good, very good, because imagine how much work went into it for that speed. A question? You make this piston and piston as it built? it stops to be a good seal.