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Old 03 August 2005, 03:18   #1
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Country: UK - England
Town: Kingsbridge.
Boat name: Dolly
Make: Quicksilver
Length: 4m +
Engine: 50hp Johnson
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Me or the boat thats wrong?

I have a small 4.5m Quicksilver RIB with a 50hp Johnson, however in a small swell say 3 foot + ish, if I open her up a bit to get on the plane the boat feels as if it's going to take off and roll. at say 15 to 20 knots it will hit a wave and start to turn as it lands it makes a movement back the otherway to right itself that's is quite violent.
Now is this me doing something wrong, the basic design of the RIB not liking any swell or what? I have only noticed this when it's only me in it and am unsure if it could be down to weight, but as the family won't go out at any sign of a wave it's hard to check.
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Old 03 August 2005, 05:45   #2
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Boat name: Sting
Make: Tornado 6.8
Length: 6m +
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Changing the trim of your engine may help have you tried that
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Old 03 August 2005, 05:54   #3
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Make: Avon 5.4
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have you got dolefins attached to your outboard?
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Old 03 August 2005, 06:30   #4
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Country: UK - England
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There are fins on the outboard, I haven't changed the trim, is that different to the tilt?
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Old 03 August 2005, 06:37   #5
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Country: UK - England
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Boat name: Shaken Blue
Make: ribcraft
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i dont really no if this would help but are you hitting the wave square on ?
if we dont hit the wave square on in our boat , it tends to land lop sided
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Old 03 August 2005, 10:38   #6
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Quote:
Originally Posted by Tight Fart
There are fins on the outboard, I haven't changed the trim, is that different to the tilt?

Get rid of the fins and then test it. Fins have their uses but they dont work on every application.

Alex
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Old 03 August 2005, 12:29   #7
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I will take them off at the weekend and give it a try.
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Old 03 August 2005, 12:30   #8
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Country: Other
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Trim. In my opinion.
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Old 03 August 2005, 12:37   #9
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Can someone please explain the difference between trim and tilt
If I have been buzzing along flat out on still water I have adjusted the tilt and seen the speed change on the GPS, I don't think thats what you meen though.
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Old 03 August 2005, 12:42   #10
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PTT (Power Trim and Tilt) enables you to control the angle of the engine when running at speed, using hydraulic rams, and operating from a control lever mounted switch.

Secondly, outboards have a tilt bar and a range of holes. This restricts how far the engine can go down and holds it at the required angle, although this is usually found on outboards without ptt.

Alex
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