Friday, October 11, 2013

new footy prototype

Yesterday a new design went waterbourne,
It is a fat design, made out of 4 3mm depron panels for easy building.
It is placed longitudinaly and nose down into the box, 153mm wide at stern and has a 32cm lwl.
The bulb is 200g, total weight is 380g. The updated KARo a rigg is used.
The goal for this boat was to create a light weight(sub400g) boat, which is beamy, with lots of volume, so it can go over the waves(no through them like KARo does), i decided to go for the 4 panels so i can modify the hull quickly, and so that some one will decide to build it cause it is a 4h project if u already have a rigg.
templates follow.
It goes quite good already. I will shift the rigg forward tho for a more neutral helm when heeled(the 12% lead of CE to CLR is not enough, there is some weather helm, too much for my liking. The hull is very stable obviously(lots of volume is shifted forward so the entrance angle is quite bad but that doesn't seem to affect speed.
Upwind the chine bites, and the boat is shaky over the little waves, i don't like that..  ..but it seems faster upwind than a karo. Downwind it has a problem..     ..it is so light that it gets thrown over it's bow and onto its side, it takes too long to get to the old course again..   ..a possible solution to that is a longer rudder. But when not heavily overpowered it goes well.
Tomorrow it will be in the water again with the changes. There are also some leaks that have to be fixed.
After i am happy with the balance upwind and downwind is solved this proto will be taken apart for templates.

clip




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