Re: Trim tabs
I understand the confussion and was trying to explain the adjustment options. Sometimes it is dificult, in fact most often. We set limits to the application to make sure you don't pick a 7"x8" plate for a 24' boat, as an example.
How much trim tab you need is realy dictated by the balance of the boat. We have installed ST1290-80 on 27' boats and they work fine.
Typlically a 12" x 9" plate is sufficient for boats as long as 26' to 27' depending on the balance and the weight of the boat.
We try to keep the applications limits within the Optimum range. Moving a little outside the range does not mean that they will not provide good results, it only means that they may not provide Optimum results.
Given the thousands of boat styles, and then adding to that the individualization once the boat is sold to the first owner, it is near impossible to creat a more specific chart. At least I am not smart enough. Anyway, that is the purpose of the adjustments.
We would be happy to listen to anyone who may have better ideas. it will help us all.