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Old 18 April 2004, 03:11   #1
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Country: UK - England
Town: isles of scilly
Boat name: Still Miss behavin
Make: Ribcraft
Length: 6m +
Engine: 250 suzuki
Join Date: Dec 2003
Posts: 129
counter rotating twins

Was wondering if anyone uses this set up/has any views on them?
My work are looking at a twin 115 installed rib for commerical load carrying and i was wondering if counter rotating engines are a must or just really a luxury?
Boat will be out in all conditions and going along side all the time.
I realise that c/r engines eliminate the prop walk and soften landings but is it worth the extra expense and hassle of spares?
thanks in advance
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Old 18 April 2004, 03:31   #2
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Country: UK - England
Town: scotland
Boat name: Leviathan
Make: Phantom
Length: 8m +
Engine: GM Diesels
Join Date: Jan 2003
Posts: 1,437
I would say they're well worth it, in fact a necessity, if your speed is likely to be very high, say 50 plus a lot of the time, as they make a boat (any boat) travelling at those sort of speeds and above far more 'roll stable', neutral, and generaly more nicely behaved, however, although you don't quote the boat size that will be getting these 115's, I would hazzard a guess your speed will be sub 50 mph most, if not all the time, so I wouldn't waste ya wonga.

All IMHO of course.


PS. they will make manouevering a little easier too, as they mean reverse/forward behaviour will be nice and balanced, especially going astern.
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Old 18 April 2004, 07:16   #3
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Country: UK - England
Town: isles of scilly
Boat name: Still Miss behavin
Make: Ribcraft
Length: 6m +
Engine: 250 suzuki
Join Date: Dec 2003
Posts: 129
Sorry the size is 8.7 design speed is roughly 37 knots on paper.Cruising at 28-30.
Guessed that at this slower speeds its not quite so vital.
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