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Old 16 August 2005, 12:42   #31
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Well you learn something new everyday I'll try that next time I go out.

Two last questions, how much power do you put on going down the wave, (I know this is how long is a ball of string type question), but if you put too much power on do you smash into the trough and get wet?

Cheers guys.
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Old 16 August 2005, 14:47   #32
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i think u havta put enough power for the bow to get up? im not sure either! lol
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Old 17 August 2005, 03:27   #33
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Quote:
Originally Posted by Kernow
Not that big, I was actually on a river with the wind gusting to a force 6 pushing the tide out with it, the waves were steep vicious little critters which the boat was coping very well with and we were having a good exciting ride, suddenly there's a ruddy great trough in front of me and splash, throttle off and in I go! I would guess the wave I hit was about 1.5 metres max, but very steep.
We were out yesterday eve in the solent and we went through the wash of a large containers ship off porstmouth - wow it was like a thorpe park ride. It managed to shut up three grown blokes! (until we were over it ) - You could see the wash a mile away coming towards us. I wonder how other smaller boats handled it - it looked like a tsunami (or maybe we were just a bunch of woosies!) - Whats the best way of handling oncoming wash? They were steep breaking waves seemed like good 8 foot from trough to crest.
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Old 17 August 2005, 03:58   #34
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Apply the power to raise the bow as you approach the wave then decrease power at the top of the wave to prevent the boat from going airborne otherwise when the boat lands water can be forced up the exhaust and therefore stalling the engine.
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Old 17 August 2005, 03:58   #35
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Originally Posted by Stuart M
Whats the best way of handling oncoming wash?
Leg it at top speed to pompey harbour..

We did think of you guys as we sat a safe distance away..

Or buy a pac.. Having seen Pete keep the throttle open whilst we slowed down coming back from Priory Bay one day, as we crossed the wake 150m behind a huge container ship.. When we asked him afterwards, he just replied, "What wake?"
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Old 17 August 2005, 04:05   #36
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Iím a little surprised to see no one has mentioned trimming the engine out to lift the bow, in our Humber assault with its fairly shallow V hull & a full load of divers hitting wash of less than a metre high can turn it into a submarine.
With it being a club RIB lots of different people drive it & the reaction of most people when seeing the wash from another boat coming towards them is to shut the throttle down, each time it has ended up with the same result (a boat full of water & people almost thrown out).
What I have done in these situations is to trim the engine out, which has raised the bow & reduced the speed a little. This has worked well so far with wash, but with following seas I usually try to keep the boat travelling just a little faster than the swell, powering up the back then easing off at the top to surf down the other side again trying to keep the bow as high as possible without coming off the plane.

Typical in the time it took me to type this, Simon mentions raising the bow!
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Old 17 August 2005, 05:05   #37
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Quote:
Originally Posted by tcwozere
Leg it at top speed to pompey harbour..

We did think of you guys as we sat a safe distance away..

Or buy a pac.. Having seen Pete keep the throttle open whilst we slowed down coming back from Priory Bay one day, as we crossed the wake 150m behind a huge container ship.. When we asked him afterwards, he just replied, "What wake?"
Is that the worst (or best) wash that you'll find in the solent?
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Old 17 August 2005, 05:11   #38
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Is that the worst (or best) wash that you'll find in the solent?
Probably, its normally an uncomftable chop caused by the waves reflecting back off the many shore lines and the huge volume of traffic moving about.

In very strong winds, watch Calshot, Lanstone and Chi harbour entrances which can build into big waves.

Pete
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Old 17 August 2005, 05:55   #39
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Iím a little surprised to see no one has mentioned trimming the engine out to lift the bow!
exactly, this is probably one of the most important aspects of driving in a big following sea!!

imho i also think everyone is generalising a bit too, maybe im misunderstanding u guys, in long rollers maybe you can throttle down the back of the wave but if you get caught in that snotty short following sea between lepe and lymington gasing down the wave will just propell ur nose downwards in to the dip due to ur potential energy and momentum! its simple physics!!

imho (and im not a big sea driver just learnt from my mistakes) i think you do need to maintain a speed faster than the waves to eliminate broaching but not accelerate anymore until nearing the bottom of the trough so ur nose is lifted and presents its fat buoyancy to lift the boat up...
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Old 17 August 2005, 06:35   #40
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if you feel the back end twitching in the trough power up fast
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