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Old 07 June 2003, 08:04   #1
Country: UK - England
Town: London
Boat name: Easy Elsie
Make: J Craft
Length: 6m +
Engine: 175bhp Evinrude ETEC
Join Date: Apr 2003
Posts: 64
take a right Clyde

-When travelling at twenty-eight knots on a flat sea my RIB wants to veer to the right if I relax my grip on the wheel. This occurs with a 90kg man sitting on the port tube and with a a 95kg man sitting on the jockey seat which the previous owner had moved to starboard of the centreline.

When stationary there was a slight list to port but even if we shifted our weight around the tendency to veer remained.

Anyone have any ideas about what i can do to alleviate this manifestation?

-With two men and two 8 year olds I can achieve twenty-eight knots on a flat sea. With just myself and one eight year old I saw thirty-four knots in a less forgiving sea.

The engine is a 60HP Mariner pushing a 4.9mm rib.

Is this degradation of performace directly attributable to the extra 130kg aboard?

Your views please.


taitharris is offline   Reply With Quote
Old 07 June 2003, 08:11   #2
Country: UK - England
Town: scotland
Boat name: Leviathan
Make: Phantom
Length: 8m +
Engine: GM Diesels
Join Date: Jan 2003
Posts: 1,437
Adjust the trim fin on your lower unit (under the anti-ventilation plate) and/or offset the motor to the right an inch or so.

Jonny Fuller is offline   Reply With Quote
Old 07 June 2003, 11:44   #3
Country: UK - England
Town: Great Harwood, Lancs
Boat name: Tigger II
Make: Bombardier Aerodeck
Length: 3m +
Engine: Tohatsu 25HP
Join Date: Jul 2001
Posts: 626
Moving the rim tab will help while underway but I would find out why their is a list when stationary.

Check the hull for water ingress and drain if needed.
Is all the weight, fuel, batteries etc on the centerline.
Has their any water got into the tubes.

As far as 28Kts with two adults +2 kids, thats not bad for a 60HP.
I would not worry about that.

In my Ricbraft 4.8 with 50HP I got about 29-30Kts one up in flat conditions.

Regards Gary
Garygee is offline   Reply With Quote

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