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Old 06 March 2007, 08:55   #1
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How fast 15hp on a 11' rib?

I need to know how fast will a 15 hp yamaha outboard will move a 11' rib at 125lbs??? which is the maximun rating hp rating for the rib im thinking of buying....

Im still not sure if I should buy a 9.5' or a 11' rib for the 15hp I have!

thanks!
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Old 06 March 2007, 09:30   #2
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I have a Quicksilver 3.1m(10.1') with a Suzuki 15hp 4 stroke - it is not a RIB but has a soft bottom with an inflatable keel. The boat has wooden floorboards to make it more rigid. The boat will do almost 25mph with 3 adults on board - very pleased with it. 9' is a bit small - go for the bigger one. What make RIB is it?
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Old 06 March 2007, 11:19   #3
J S
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I have a zodiac 340 (3.4metres) and i can get 23 knots out of it. Its great fun. But its not a rib

James
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Old 06 March 2007, 12:37   #4
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Thats it!!! a Zodiac 340S the Zoom or the Cadet,,still havent decided...

J S: So u believe a 2 stroke 15ph will be enough for three adults?

codprawn: How do u transport the 4 stoke? I hear they can't be rested or layed down due to teh oil in the pan...???

thanks!
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Old 06 March 2007, 13:26   #5
J S
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Quote:
Originally Posted by ALEXSAILS View Post
Thats it!!! a Zodiac 340S the Zoom or the Cadet,,still havent decided...

J S: So u believe a 2 stroke 15ph will be enough for three adults?

codprawn: How do u transport the 4 stoke? I hear they can't be rested or layed down due to teh oil in the pan...???

thanks!
Mine is the 340 Acti-V

My Honda is a 15hp 4 stroke. i Has to be layed down on its side but it is no real difficulty. I think a 15 is fine for 3 adults because i have had 5 young adults in mine and it still planes and then goes some. But i don't think 3 adults in this size of boat will be comfortable for a long period of time.

James

Here are some pictures.










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Old 06 March 2007, 13:49   #6
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Wao thanks for the pics!!! Now I can't decide between the air or the wood panel floor of the Cadet 340.

The air floor is lighter and softer and the wood panel floor gives more overall rigidity and is heavier...

I plan to use it here in Puerto Rico and sorounding islands (US and British virgin islands) where the seas are rough and for long distances.

What is ure experience between both??? Anyone....
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Old 06 March 2007, 13:55   #7
J S
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I have found the air floor to be very confortable but if you are carrying any heavy loads like dive equipment a solid floor is the way to go. The solid floor models do hot have as great V as the air floor model though, something to consider.

James
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Old 06 March 2007, 14:32   #8
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Even though the wood floor models dont have an agresive V,,, my thoughts are that the air floor deflects a bit when pounded from underneath by the waves and looses some of its V effect....making it have less of a V than the wood floor system....

Did I explain myself right???
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Old 06 March 2007, 14:34   #9
J S
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Originally Posted by ALEXSAILS View Post
Even though the wood floor models dont have an agresive V,,, my thoughts are that the air floor deflects a bit when pounded from underneath by the waves and looses some of its V effect....making it have less of a V than the wood floor system....

Did I explain myself right???
Yes i can see where you are coming from but when the floor is inflated to the correct pressure it stays extremly rigid and keeps the formation of the V if only flexes very slightly when you hit a really big wave.

James
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Old 06 March 2007, 15:59   #10
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Would u say the added weight of the wood panel floor will give less performance out of the 15hp engine compared to the lighter air floor in the same model inflatable?....regardless of the V design of each...

In other words should my decision be based on how weight will affect performance in the water with same hp?
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