On Jan 15, 9:24*pm, wrote:
This weekend I was out happily sailing until a trimaran passed me and
I went into a slump tryin to figger out a way to make a monohull do
such speeds or to make a lightweight trailer sailer that is
seaworthy. *Sure, some monohulls can plane but I dont really trust
such ULDB hulls in any seas. *Maybe you could incorporate some
advantages of the tri-hull into a lightweight trailerable mono in
order to enhance stability though.
Make the parts of the hull just at waterline as an inflatable
bilayer. *When you start to heel, the downwind side inflates creating
much greater bouyancy on that side resisting the heel.

You need to take a better look at boyancy. It is indeed developed and
only relational to the waterline. Once a material is "submerged" it is
irrelevant to boyancy so it does not matter if it is solid, liquid, or
gas.. although the weight may alter other calculations relating to a
hull at heel... Sorry, I am not an engineer, but hopefully you will
understand what I mean here. MA or ME feel free to chime in here, I
certainly won't be insulted.. although I may take notes..