weird turning.

[Jack h]

HI,
we have a 5m humber assault with a 60 4/
When going fast on the plane, about 2/3 throttle and upwards it feels like our rib really dosn't want to turn, most ribs ive driven tend to bank over a little bit and lean into the corner making turning easier on the driver as your pushed into the seat.
On our rib it dosn't bank over at all when you turn, it feels bit like a go cart compared to a motorbike, a motorbike leans in, the gocart just turns, which is a little disconcerting as when you turn hard it feels like your going to be thrown of your seat sideways. /
thanks

[jwalker]

Humbers do tend to ride flattish but try trimming up a bit and see whether it helps.

[Jack h]

forgot to say, is there a solution to this? ^^^^^

[BruceB]

Assaults do corner very flat in tight turns, they also tend to skip sideways in really tight high speed turns. Trimming up will just cause cavitation in these hulls.
Unfortunately this seems mainly to be down to the shallow V config so there is little to be done about it.
Trimming down before high speed turns will help cavitation but won't stop it completely.
This is one of the reasons why my next boat will be a deep V!

[Chris]

Just been down in Cornwall for a week with a freind who has just bought a Humber (I think its the 5 meter one) It has mariner 90 on the back and certainly felt very unstable at high speeds. There was no way you could even think of trimming up without the boat feeling like it wanted to spin around the prop. Every time he went over about 27 knots you really had to watch it as it would start pitching left to right (chine walking) and if you did not cut the throttle it could get quite dangerous.

You could see when running along side of him that even at 25 knots only the back 2 foot of the boat was actually in the water.

Chris

[jwalker]

Originally Posted by Chris1573

You could see when running along side of him that even at 25 knots only the back 2 foot of the boat was actually in the water.

Then he needs to learn how to adjust it and drive it.

[Biggles]

Sounds like he is learning. Just asking for other peoples experiences by the sound of it.

[jwalker]

Biggles, you've maybe got Jack h and Chris's friend mixed up.

[jwalker]

Originally Posted by BruceB

Trimming up will just cause cavitation in these hulls.

Then mount the motor a bit lower. Don't blame the boat.

[matt h]

same happened to mine, had a mariner 90 on a 5.3 ocean pro, and i could never trust it in a steep turn!! felt unweildy