trim angle

[jollyricard]

hello, you can list all the existing methods to change the trim angle of planing hulls and how do they work?

[marshmat]

Either change the weight distribution, change the thrust line, or change the shape of the running surface.

Weight distribution is changed simply by moving people, cargo, tanks and equipment fore or aft.

Trimmable engines (sterndrives, outboards and a few high-speed jets) can change the thrust vector to suit the conditions.

The running surface can be modified with trim tabs, fixed extension flaps, or by using fairing compound to adjust the hull surface. Some whale-tail fins can also change the effective running surface.

Generally speaking, for a given hull, proper distribution of weight tends to be a more effective solution than throwing extra hardware at the problem.

[jollyricard]

thanks