Advice Needed On Bow Angle

Milan · 08 September 2005, 10:35

Soom advice needed from experts and I dont know if you can tell from the pictures but when Iam traveling along I get the feeling that the bow is possibly to high and maybe a bit on the lite side with the trim set at what feels like the optimum just over half way out if that makes sence she feels high but if I bring the trim in she feels slugish and heavy on the steering hope some one can give me som help or suggestions on this thanks in advance

codprawn · 08 September 2005, 12:51

Looks fine to me......

Phil Chitty · 08 September 2005, 13:04

Hi Milan

It doesn't look that much different to the angle my 550 sits at when under way.

Have you tried sitting at about 25 knots and trimming up and down whilst watching your rev counter?

Might give you an indication of your correct trim.

RIVA · 08 September 2005, 13:08

two thirds out 1 third in the wet

Milan · 08 September 2005, 13:25

Quote:

Originally Posted by Phil Chitty

Hi Milan

It doesn't look that much different to the angle my 550 sits at when under way.

Have you tried sitting at about 25 knots and trimming up and down whilst watching your rev counter?

Might give you an indication of your correct trim.

Yes tried that Phil she likes to be at 4000 revs does about 26- 27knts at that but trimming up and down does not seem to bring the bow down it just goes heavy on the steering when to far in and cavitates when trimmed to far up

Milan · 08 September 2005, 13:26

Quote:

Originally Posted by RIVA

two thirds out 1 third in the wet

How does it look to you Riva would you say it was balanced or to heavy on the transom

RIVA · 08 September 2005, 13:59

looks ok to me

Simon Hawkins · 08 September 2005, 14:23

The pictures which you have shown shows the boat looking well balanced. However surely their cannot be a certain answer to how much trim to you use, as this would depend on the conditions in which you are operating.

The reason for the boat feeling heavy with the engine trimmed is beacuse the V of the hull is cutting through the water plus you have a more wetted surface. This should only be applied when the vessel is heading into a head sea.

Simon

Milan · 08 September 2005, 15:49

Quote:

Originally Posted by Simon Hawkins

The pictures which you have shown shows the boat looking well balanced. However surely their cannot be a certain answer to how much trim to you use, as this would depend on the conditions in which you are operating.

The reason for the boat feeling heavy with the engine trimmed is beacuse the V of the hull is cutting through the water plus you have a more wetted surface. This should only be applied when the vessel is heading into a head sea.

Simon

Cheers for that Simon but can I just explain that when Iam standing at the wheel looking forward the bow looks real high that said it might just be the sheernes of it but as for the bow feeling lite that seems to be more of a gut feeling than anything else some one suggested trim tabs would this possable be an answer or even fitting fins to the cavitation plates as some one else suggested or am I just fussing over nothing

PS. finding the optimum trim leval is no proplem its this bow thing that bothers me

Simon Hawkins · 08 September 2005, 16:12

I think you will find that it is the height of the bow. I dont think trim tabs will benefit you at all as these serve the same purpose as the engine trim. With regards to fins on the plate again what for what purpose as the boat looks perfectly balanced.

codprawn · 08 September 2005, 16:17

The bow is swept up at then end which is the way it should be for good seakeeping!!! That is why it probably looks a bit higher than normal - be greatfull - shouldn't be much risk of stuffing!!!

Alan · 08 September 2005, 18:47

Unlike Prosports which are dead flat and no shear IIRC?

codprawn · 08 September 2005, 20:15

Not quite - there is a bit of a curve but not as much as some - similar hull to the Revenger.

Richard B · 08 September 2005, 20:15

Your boat looks to be riding OK to me!

In fact, if anything, it's the stern that's plonked firmly in the water rather than the bow being too high. I'm going to stick my neck out and estimate your speed in the two side-on photos as no more than low 30's (knots)?

I usually trim to lighten the steering, then match the trim to the conditions. Like Simon has said, only keep the trim "in" or "down" in a head sea. In good conditions, carry on trimming out gently and watch the speed rise slowly.

Alan - I suspect Codprawn may have the Rapier hull rather than the Giggleswick/Wrigglesworth/Temptress hull? But I'm just guessing here! Hope it's laminated better than Ferryman!

hard1 · 08 September 2005, 23:02

Quote:

Originally Posted by codprawn

Not quite - there is a bit of a curve but not as much as some - similar hull to the Revenger.

Whaaaaat?

Nah, never - you're 'avin a laff boy.

hard1 · 08 September 2005, 23:05

Quote:

Originally Posted by codprawn

Not quite - there is a bit of a curve but not as much as some - similar hull to the Revenger.

Yeah - reeely simlar!

Milan · 09 September 2005, 09:23

Quote:

Originally Posted by Richard B

Your boat looks to be riding OK to me!

In fact, if anything, it's the stern that's plonked firmly in the water rather than the bow being too high. I'm going to stick my neck out and estimate your speed in the two side-on photos as no more than low 30's (knots)?

I usually trim to lighten the steering, then match the trim to the conditions. Like Simon has said, only keep the trim "in" or "down" in a head sea. In good conditions, carry on trimming out gently and watch the speed rise slowly.

Alan - I suspect Codprawn may have the Rapier hull rather than the Giggleswick/Wrigglesworth/Temptress hull? But I'm just guessing here! Hope it's laminated better than Ferryman!

Your right about the speed Richard 27knts there abouts

Milan · 09 September 2005, 09:26

Thanks for all the comments folks I shall just have to stop worrying like an old women