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Old 19 August 2010, 11:24   #11
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Country: Ireland
Make: Redbay Boats
Length: 9m +
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Originally Posted by Screaming04 View Post
I too am curious as to those in smaller boats operating twin 40's or 60's. Can they plane on one?
Meh 6.5 with 90s can plane quite happily at 22.5kts on one wing

She falls off the plane at about 16kts

BTW, Nice rib you have there lad

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Old 19 August 2010, 12:01   #12
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Country: Canada
Town: Vancouver, BC Canada
Boat name: Black Ops
Make: Zodiac Hurricane 733
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Originally Posted by willk View Post

BTW, Nice rib you have there lad
Thanks! I just can't stop putting up pictures since I've figured out how.
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Old 21 August 2010, 08:48   #13
Country: France
Town: Cannes
Boat name: midkat 550
Make: apoge
Length: 5m +
Engine: 2x50 Tohatsu
Join Date: Jan 2008
Posts: 126
I have another answer, but on a very uncommon rib !

The rib is a Stingray-Tomcat (european name) 6.3 catamaran, with 2x50hp Tohatsu (carb version) and a pair of (too) long props (15" stainless for speed)

With 6 male adults on board, she was unable to plane on the starboard engine - but she did on the port one.
The top speed was 36knots with 2 on board, not bad at all.

The same boat run at 45 knots with a pair of 90 Yam (2 stroke) and 15" ali props @6000 rpm, a bit too high - 16 or 17" SS should gain 2 or 3 knots easily, possibly more.
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Old 23 August 2010, 05:02   #14
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
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And from the very dim & distant past, SR5.4, twin Yam premix 30s. - Just planed & no more, but took forever to get rid of the ballast!
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Old 05 September 2010, 16:11   #15
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Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 6m +
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MMSI: 235060745/235111389
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I can plane quite happily at 28kn on one engine, using both engines gets me about another 10kn. I'm on 19p Mercury Rev4s, it was always the plan to be able to run on one engine.
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Old 05 September 2010, 16:25   #16
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Country: UK - Scotland
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Make: humber
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I used a SR 5.4 with twin 30's and it would plane on one, - with just the driver, or with one moveable crew as well, to get it over the hump, but no more than that.
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