If you have bothered to look at my post you see that I said that on a small boat with low free board you do not have a problem of trim and balance (meaning that you can corect the trim with the engine if you need to and the balance you can distribute the weight round so that it does not lean on one side. - since I thought you are an expert in boats you will understand that but.........
Now on a bigger boat is much more difficult to adjust all that (I expect that you will agree) and therefore you need trim tabs.
Cabin RIBS have high free board (and also speed is a factor but we will leave this out as we assume that the boats we are talking about do over 15 knots). Free board distance plays an important role in the boat leaning over in high winds and triming is of importance (triming means bow triming i.e. bow going up or down and balancing i.e. not leaning on either side - hope that I made this clear
What all means (what did you say your degree was on?? By the way for lessons on basic naval architecture and engineering try an HND course), is that the higher the boat the more exposed to the beam wind is and the more is pushed down on one side and the more uncomfortable the ride becomes so you need the trim tab to correct this as well as the bow ride.
Boat manufactures who said this are too many to list (also it will help you to know that you should have a look in basic naval architecture and engineering books). I have also asked some UK boat manufactures too and trim tab manufactures.
You will be supprised to know that they all said that these are TOYZS FOR THE BOYZS
(I think the expression fits the description of someone I have never met doesn't it DIRK??
On a small RIB (up to 7/8 mtrs) trim tabs are not of much use (no that high free board, low boat weight, easy to move things on the boat to correct trim (i.e. leaning left or right
), engine trim use etc etc
Now can we have a serious discussion in this forum??