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Old 04-05-2018, 04:48 AM   #31 (permalink)
It's all about Diesel
 
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It's becoming too complicated. Maybe if you could set both engines to deliver their output to a single shaft, eventually resorting to clutches to disengage one of them in case of failure, it's going to be the safest way to deal with them.

There was a TV show that featured a twin-engined dune buggy fitted with 2 Royal Enfield engines, maybe you should watch it on YouTube to seek for inspiration.

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Old 04-05-2018, 07:32 AM   #32 (permalink)
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You have just described my diagram in message 8, as further described in message 30. I would keep both engines disengaged in a mis shift (verified by the shift position lights) because of the "solid" connection of the intermediate shaft. otherwise, if I wanted one engine to run without the other, I would have to add clutches at the intermediate shaft. It's simpler to use the clutches inside the transmissions. If I thought one transmission could handle the outputs of both engines, I would find some way to tie the two crankshafts before the transmission, but using both transmissions with safety clutch lockouts is simpler. I'm sure the dune buggy you mention was equipped with two inputs to one transmission, and I'm sure the two engines were not synchronized with each other, but I want to keep mine smoothly sync'ed 90 degrees out of phase to avoid the kind of thump-thump, thump-thump Harleys have.
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Old 04-06-2018, 01:28 PM   #33 (permalink)
It's all about Diesel
 
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Quote:
Originally Posted by Angel And The Wolf View Post
I'm sure the dune buggy you mention was equipped with two inputs to one transmission
I actually don't remember, I just remember one of the clutches failed.
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Old 04-07-2018, 04:43 AM   #34 (permalink)
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Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
I actually don't remember, I just remember one of the clutches failed.
Did it fail to engage, or to disengage?
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Old 04-07-2018, 06:52 AM   #35 (permalink)
It's all about Diesel
 
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Quote:
Originally Posted by Angel And The Wolf View Post
Did it fail to engage, or to disengage?
Actually it blew away for some reason that I don't know, but it might have been due to overheating (it was riding through a desert).

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