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07-31-2011 | 05:01 AM

#6

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: HP VT49 twin?

Squirrel,

The difference in balance would be minuscule at most, as long as the single-throw crankshaft is used...

If a 180° crankshaft is used, like the one in the OS Gemini, the pistons will be moving in opposite directions, primary vibration would be quelled and only low amplitude secondary and tertiary level vibration would make the engine very smooth.

The cylinders would need a bit more offset than your photo shows (hence tertiary vibrations).

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