19874Re: [Michalak] Re: Easy build catamaran thoughts invited.
- Oct 4, 2009Douglas Pollard wrote:
>I guess what I was thinking when I wrote the previous post is. That the
> graeme19121984 wrote:
> > --- In Michalak@yahoogroups.com <mailto:Michalak%40yahoogroups.com>
> > "gary" <gbship@...> wrote:
> > > I am, with Jim M's advice, building a 4-foot longer version of
> > > Trilars. That can cruise two for a long time, and carry three on
> > > short trips.
> > Ah, so that's a 5.5Ft plug in Toto now? Is it really that easy?
> > ~ Graeme ~ ___/) ~ ~
> I don't know if this will make any difference to your thinking or
> not. It's my understanding that catamarans do not plane and that they
> go fast because of the narrowness of hulls providing a very high hull
> speed. I don't know about Trimarans with the center hull wider they my
> plane on the center hull and just have high hull speeds on the outer
> hulls. I have no idea if this applies to what you are doing but thought
> to throw it out for consideration.
modern 30ft'ish trimarans I have seen have very narrow center hulls that
widen out above the water line. They basically have a long narrow foot
well in side the boat with bunks on either side. These extremely
narrow center hulls also have very high hull speeds. But a small
trimaran would seem to need a wide hull amidships to have any usable
space. A wide hull would have to plane. I'm wondering if the bow would
be able to climb on top the water and drop down on a plane at some
speed. With the outer hulls not planing the main hull would have to lift
them as well. AS they lift at the bow the hull in the water would get
shorter so hull speed would go down. They would not likely plane with
such a narrow none plaining hull shape. Would they then drag the
center hull speed down. I don't pretend to know much about trimarans
but these are kind of my what if's. I would like to hear some
thinking on these musings. Doug
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