one engine / twin drive setup???
12-05-2003, 05:41 PM
#11
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This could really be a good thing for smaller boats with a big horsepower single engine. It would avoid torque steer and make docking much easier. Those would be advantages. In terms of cost, the idea is to be able to keep running Bravos reliably with 700+ hp without having to shell out for a Speedmaster. But in my opinion, there would be no big savings, if any. Because two Bravos+splitter would have to be significantly less than a single Speedmaster. I don't think this will happen. In terms of performance, the idea is to avoid high power loss associated with the Speedmaster. But again, frictional loss of efficiency of two Bravos+splitter would have to be significantly lower than that of a single Speedmaster, which is going to be difficult. And I say it would have to be significantly lower in order to compensate for the effects of a more diffused thrust of two outdrives vs. one Speedmaster. So I actually think that an inverse splitter would be more useful because it would allow larger boats with 3 or 4 engines to run only two drives which would eliminate torque steer on triples and be good for performance because a) the thrust would be more concentric and b) if the splitter costs less power in terms of friction, then with the addition of one or two splitters and the elimination of one and two drives respectively, the overall loss of power due to inefficiencies in transmission would be reduced ie. more power to the prop... what do y'all think?
12-05-2003, 05:48 PM
#12
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how would it be to have a race boat with two motors driving a single shaft drive through a system which is inverse from what IMCO are doing? I know it has been tried. Anybody knows how it affects performance? I have a feeling that it would hurt immediate acceleration but improve top speed and handling. Any ideas?
12-05-2003, 09:12 PM
#16
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We made an Arneson Drive back in the late 70's that took two engine to one drive and one engine to two drives.
I do not know where the boat is or how it performed but I still have the prints and such of the project.
I do not know where the boat is or how it performed but I still have the prints and such of the project.
12-05-2003, 09:37 PM
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Originally posted by cuda
Seems to me it would be slower due to more hardware dragging in the water.
Seems to me it would be slower due to more hardware dragging in the water.
...but I think the purpose of the dual drive is stability and reliability. For speed skiing, you want the boat fast and smooth...and that's not easy when you're putting 1,100HP+ in a 21'-24' boat. I think they have all the speed they need.
Those boats (w/turbos) can run very fast for a long time.
12-06-2003, 04:52 PM
#19
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Team Scarab Had or has a Splitter
Box which we installed in a number
of boats a few years ago (Twin Drive Propulsion systems) US Patent 5649844 hydra-drive systems 764 newton way, costa mesa ca.
Not sure whats up with them right
now ButI know there were a number
of them made.
Mike J.
Box which we installed in a number
of boats a few years ago (Twin Drive Propulsion systems) US Patent 5649844 hydra-drive systems 764 newton way, costa mesa ca.
Not sure whats up with them right
now ButI know there were a number
of them made.
Mike J.
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