Prop Rotation?
- Thread starter denverd0n
- Start date
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If you have answers, please help by responding to the unanswered posts.
If you have answers, please help by responding to the unanswered posts.
I have cruised a sailing catamaran with twins with co rotating props and could never really notice any prop walk. Twin engines, whether co or counter rotating make it easy to back up the way you want to go.
And FWIW there are two ways to get counter rotation: one engine turns backwards (Perkins and DDs) or the transmission reverses the prop shaft output.
David
And FWIW there are two ways to get counter rotation: one engine turns backwards (Perkins and DDs) or the transmission reverses the prop shaft output.
David
Gulfstar 36
Senior Member
My 36 MrkII has both left hand, and I have no issues backing down.
Ski in NC
Technical Guru
Borg Warner gears of that vintage did not have the same ratios when rotation was reversed by one. 1.91:1 and 2.10:1. Close, but not the same. One prop had to be about one inch off in pitch, and different prop rpm set up some unpleasant harmonics. I could see the rationale to spin the props the same way.
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