So, here is another Stirling model engine using the MC Stirling technology.
The cylinder is mostly the same as the MC_easy (in horizontal position).
Short described: about 200*100*20mm in size, two aluminum sheets (1mm), case
(side walls) made of balsa wood, displacer wedge shape made of
balsa wood with a top weight of 30 gramms, longest inner displacer's stroke
length 12mm, piston about 18mm diameter, diaphragm about 35mm
(rubber from a childrens balloon). All cloued and sealed with silicon
paste.(Basic construction plan like the MC_easy)
The engine has no bearings, just springs: the cylinder has two 8*0.5*20mm steel blades (cut off from the spring of an old alarm clock)(which you can see on the phote above) and the displacer has one of those.
The model engine is heated by a candle, which speeds it up to 250 strokes a minute, while the bottom aluminum sheet heats up to about 130 degrees C and the top sheet to about 50 C. The stroke of the cylinder is about 13mm, using one candle, and about 17mm when heated by two candles.
The engine can drive a flywheel (see above picture), but runs even better
without (like in the bottom pitcture: connecting rod disconnected).
Then, when heated up the engine self-start, initiated by the slightest
seismologic event (similar to the MC_easy in horizontal position).
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. See Bob Sier's MC_easy in horizontal position on an London exibition:
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