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Running Model Hercules Twin Cylinder Engine By Ron Colonna

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Uploaded by on Apr 27, 2010

Hercules
Ignition: Glow or Spark
Bore: 5/8 in.
Stroke: 5/8 in.
Two Cylinder
Four Cycle
This engine is built from drawings and castings puchased from the late Bob Shores. The engine is a two cylinder design with both pistons and rods attached to a single crank pin. The cylinders fire alternately since it is a four cycle engine and the cam is cut accordingly. It is water cooled and sports a belt driven pump and fan. Oil is splash from the sump. I run mine on glow ignition and I burn straight methanol. It can really scream and I broke a connecting rod one day trying to see how fast it would turn. It was well over 10,000 rpm. Damage was confined to a single rod. Balance would be better with a conventional crank but it runs fine.

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Autos & Vehicles

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All Comments (5)

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  • Beautiful engine. Well done.

  • Precious!!

  • great model.

  • very nice work , runs spot on too, what sort of piston rings are you using , i see you have managed to get a good seal somehow as there is no exhaust smoke.

  • Exactly one year since it was uploaded and no comments! FIRST! It has an interesting sound and defiantly a nice model!

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