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Trim tab problem

Old 07-30-2004, 08:05 PM
  #1  
TheUnicorns
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Default Trim tab problem

i just put these trim tabs on and i went to go drive it and it greats! It doesnt bounce out of the water as much and is better. One slight problem. I cannt turn. i can turn to the right but i have to make a huuuug turn. i can turn to the left only at lower speeds well but at higher i cannt without flipping it! Now i think from looking at this picture, i think the right one isnt on an angle like the left one. im just trying to verify this. and if its not it, please help.
thanks - joe (click on things below to see image)
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Old 07-31-2004, 03:56 AM
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pompebled
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Default RE: Trim tab problem

Hi Joe,

It's hard to tell from the pic (dark boat on dark background), but did you mount the tabs 1/16"higher than the hulls bottom?

Putting on trimtabs is, in fact, lengthening the boat, which changes the CoG, place of the rudder (virtually closer to the transom), which may be why the turning circle has gotten bigger.
The trimtabs also keep the hull more upright in turns, it leans less in the corner, giving the same effect.
Trimtabs keep the transom up at speed, making the propwalk more noticable, so turning right is possible, turning left barely.

These problems are the reasons why I try to avoid trimtabs when I can.
Have you tried shifting the CoG forward (lead on the nose) to eliminate the porpoising?

Regards, Jan.
Old 07-31-2004, 06:52 AM
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Ron Olson
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Default RE: Trim tab problem

Placing a black boat on the black painted foam does make it hard to see. Sometimes with trim tabs you have to have one higher than the other to compensate for offset weight or torque. Start them off with the tabs level with the bottom of the hull then dial them in from there and take the advice from Pompebled.
Old 07-31-2004, 12:07 PM
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TheUnicorns
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Default RE: Trim tab problem

okay thanks, ill keep in mind about the dark on dark thing.

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