Re: whale tail
This subject again, it comes up and there's so much misunderstanding and improper use of the item that getting good answers is very difficult.
They really only do one thing, and not every boat can benefit from using one.
If you want something you can bolt on and then head to the water, this is not what you should buy.
The real use of a foil (fin whatever you want to call it) is to allow you to raise the motor higher without the prop ventilating, that's it. It will sort of do some other things, but not well.
By raising the motor you will normally gain some RPM and speed which may allow you to use a different prop, which may again increase the speed. It will also reduce bow lift and hopefully improve handling. With the huge numbers of different hull designs, power options, types of use, etc, its impossible to say it will help in every situation.
If its dragging in the water at speed then you haven't done the correct setup, or your boat, motor and prop combination can't use one. Dragging in the water at speed is where all the problems come from.
On an I/O you can't do much adjusting (if any) so your stuck with what you get, if you like it, great, if not, don't use one.
Tabs are typically what people are looking for to fix issues and they have few down sides.
