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07-31-2011 | 01:18 AM

#4

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: HP VT49 twin?

Reggy,

Here is a much better, larger photo; from which one can see the details.

This is a wrong crankshaft! If anything, Hirtenberger should have used a 180° crankshaft, to achieve even 360° firing intervals and a much, much better balance.
The con-rods would also be more conventional; instead of the 'knife and fork' arrangement.

This engine, as designed, has 180°/540° firing intervals and a single counterweight...

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