Monday, May 10, 2010

[Electric Boats] reduction ration for Mars 709 motor

 

Okay, I'm up to my armpits in this conversion and still going. What is the "typical" gear reduction range for the Mars 709 motor to the prop shaft? Again, I've got a heavy 36ft sailboat. Just need a number to start with.
Also, am I aiming for hull speed with the prop calculation or do I aim for 2/3 or 1/2 of it, which is probably the more expected speed? Wouldn't mind trying one of those urethane props if I can get some advice.
Thanks again.

Victor

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