> I'm considering installing either doel fins or trim tabs on my 17 foot
> runabout with a 100 hp outboard.
> I've heard conficting reports as to which option is better for helping
> a boat to plane sooner. Which works better, and why?
> Thanks in advance...These are two different animals. I have both on my 23 footer. Trim
tabs are great for leveling the nose in a low speed plane as when making
a long passage into a head sea. Drive trim won't do this as well. Trim
tabs also level the boat in side winds, quartering seas and in uneven
load situations. They do this well and Doel fins don't do it at all.
The trim tabs provide almost no lift at low speeds but simply add drag
so are very little help in getting on plane. The Doel fin and it s
imitators are airfoil shped and provide lift at low speeds. Again,
these are two completely different products for two different purposes.
A well found craft I/O or outboard, will have tabs, fin and drive trim,
as only drive trim raises the nose on plane and is a must to plane down
large breaking seas without bow steer or burying in the trough. If you
don't take your small boat onto big water, it probably doesn't matter,
but if you go out with the big boys, you will need tabs and drive trim,
but not hte Doel fin.