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Angel And The Wolf 04-01-2018 05:07 AM

Twin Bike Sports Runabout
 
2 Attachment(s)
Engines synchronized by common distributor

Frank Lee 04-01-2018 05:18 AM

Bikes already suck vs cars re payload moved/gallon. This twice as bad.

Angel And The Wolf 04-01-2018 10:25 AM

This is just for fun!

jakobnev 04-01-2018 12:46 PM

Quote:

Engines synchronized by common distributor
Until you turn. :rolleyes:

Angel And The Wolf 04-01-2018 01:57 PM

Yes, some method of de-clutching the inside wheel activated by the steering, perhaps electrical clutches on the rear wheels.;)

Angel And The Wolf 04-01-2018 03:42 PM

2 Attachment(s)
Quote:

Originally Posted by Angel And The Wolf (Post 565445)
Engines synchronized by common distributor

Yes, but 90 deg out of phase with each other so that there are four single power pulses each revolution, rather than two double power pulses. This can be achieved through the use of an eight cylinder distributor shared by both engines.

cRiPpLe_rOoStEr 04-01-2018 07:49 PM

The closest to that I've seen were projects for wheelchair-accessible trikes, but those resorted to scooters instead of traditional motorcycles. But I'm not sure what had been done to keep the engines synchronized.

Angel And The Wolf 04-01-2018 10:58 PM

1 Attachment(s)
Quote:

Originally Posted by cRiPpLe_rOoStEr (Post 565492)
But I'm not sure what had been done to keep the engines synchronized.

Maybe, the easiest system would be to place the two engines behind the rider, and join them physically, 90 degrees apart, with a double sprocket idler shaft, and drive a single rear wheel, making it a twin engine trike. Slightly lighter, easier to turn, and easier to license. The reason for connecting the engines 90 degrees out of phase is to have 4 instead of 2 power pulses per revolution. Smoother, and sounds better.
(Something like this:)

Frank Lee 04-01-2018 11:24 PM

Let 'em be "unsynchronized"- twin engine aircraft make no attempt to phase crankshafts; matching rpm is sufficient.

Angel And The Wolf 04-02-2018 12:05 AM

Twin engine aircraft don't drive a single wheel, and drive, instead, a fluid. In addition, to provide for rpm differential to aid in turns, the two aircraft engines have to be able to operate separately. Again, twin engines provide limp home capability. On the other hand, I believe some twin engine aircraft DO mechanically join the two props, so that one engine can turn both, if the other goes out.
I don't want the engines to phase in and out with each other. Those vibrations would be far less pleasing than eight evenly spaced firings.


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