A post over on Sailing Anarchy about the Lightspeed 32 had one fellow asking why at the dock it looked like the stern was trimmed down, bows up a bit.

Here is my reply and the strange response.

" QUOTE(Fasterdamnit @ Mar 1 2008, 02:30 AM) *
LOL!

It is a super light cat, that is what is going on. Move the sail bags and other gear forward and it will probably chnage a bit.

Besides, since it will try to lower the bows as it accelerates, a touch of bow-up at rest is not a bad idea. [endQUOTE]


blablabla
catamaran when they speed up just trim by the stern , as trimaran
Foils allow to control that by adding lift behind the LCB
So think again
PS: more over if that just happens with sails....i just wonder with 5 crews then...
To improve your knowledge look how a multihull trim at speed:"
(pic of 60ft Tri, close hauled in flat water cruising along with bows just out of the water.)

So I said-

"Hah!
Sail cats much?

Well,
I have raced Hobie 16's, G-Cat 5.7, Prindle 18's and Stiletto 27. Sailed on an F24 in SF bay. That was a blast- flying 2 hulls is a trip. On a screaming reach they all exhibit the same behavior due to the dramatic increase in forward lift on the rig vs. drag on the hulls and a high power to weight ratio. The Stiletto, much like the Lightspeed had lots of freeboard, tall bows and drew only a few inches depth because it was so bouyant. So while the bows would drop a little bit, there was never much worry about pitchpole unlike the smaller beachcats."

And the response-

"Man i really struggle with that: You don't get any lift from the bow cause it is out of the water !
That's physics...at high speed , the hull will NATURALY trim by the stern...
then trim tabs , crew ...can change that"



Guess I am just lost and speaking gibberish...

http://forums.sailinganarchy.com/index.php?showtopic=62221