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TRS to SSM3 HP change

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Old 12-04-2017 | 05:16 AM
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Default TRS to SSM3 HP change

What is the HP draw TRS to Speedmaster3? clearly a 3 takes more to spin, curious as to what that may be??
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Old 12-07-2017 | 11:27 AM
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There's no perfect answer. We used to say 6%-10% HP loss depending on the drive.
Some say almost twice as much loss for the dual vet shafts in SSM's.
Same engine set up on same prop shaft dyno with each drive is the only perfect answer.

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Old 12-10-2017 | 06:43 AM
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Gotcha, thx just doing some numbers old boat vs new...
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Old 12-15-2017 | 04:21 PM
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I personally wouldn't worry about it. I'd go with the stronger drive, and that is the SSM.
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Old 12-15-2017 | 10:03 PM
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Not changing, I have SSM on new boat I’m trying to conjure engines and speeds
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