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Old 11-02-2017, 08:02 PM   #151
ben2go
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Quote:
Originally Posted by Nomad Willy View Post
OK Ben it soulds like they are close to a 180 crank. The only succesful 180 crank engines I know of are the old Brit bikes. They all had massive crankshafts (to ballance the counterweights to the pistons) so I’m going to guess this new engine will pay a weight penalty w a heavy crank. Looks like the pistons and rods are heavier too. And there’s two wrist pins on the piston and that adds to the weight but if it were a single wrist pin it may be about the same total weight ? So the chance of this engine being comparatively light is low or less.

But the high torque they get from only two cylinders is golden. I see it’s 50/50 bore/stroke. Makes for a compact engine too. I see the chain driven cam drive in-between the cylinders adds to the compactness. Many motorcycles are driven thusly.

Makes me wonder if a boxer engine w the two crank arrangement would have even more advantages. Food for thought.
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