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nacraoverlord

Member Since 11 Apr 2011
Offline Last Active Yesterday, 02:56 AM
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Posts I've Made

In Topic: Selfish: a boat that -I- would actually like

22 April 2014 - 06:05 AM

I'd look into building a bot like this-

   say 14 ft LOA

   4 ft beam + 2 feet of wings + trapeze

   130 sq ft sail (I have an old snapped FD carbon mast I might sleeve a carbon tip onto and get a sail built for)

   125 lbs all up weight would be awesome, 150 more realistic

   Plywood hull


In Topic: The Will To Win

12 April 2014 - 10:59 PM

Excellent vid, I think we can waive the customary greeting.

 

Why the change to foil kites?


In Topic: Single Handed 16ft Skiff

10 April 2014 - 04:14 AM

$7500 probably


In Topic: Updating your A-cat to a foiler

01 April 2014 - 01:05 AM

It seems to me that for the top sailors in the A-Class, the boat is never what makes the difference. Even this year with the drastically different setups the best sailor won. Usually after the first year of development of a new feature, by the second year a few manufacturers have the similarly good gear to sail on (saarberg/fiberfoam masts, ashby/landy sails, DNA/ Exploder etc), meaning that the class progresses as far as equipment but usually similarly skilled sailors have similar quality gear.


In Topic: ...the kite-FOILER thread....

25 March 2014 - 10:57 PM

I think, like Chris said, learning may be easier w a controlled foil.

 But in the end, the highest efficiency and speed will be attained by fixed foils.

 

 Winglets are only able to change the AoA of a foil by inducing drag.  it's that simple...

 

 To the crude controlled foil pictured above, I think they have the winglet's on the wrong wing.

they should be on the aft one.  Think of an airplane, pitch is controled by the tail wing.

Some of this may be true for airplanes, but the dynamics of a sailing vessel are very different. 'Winglets' or flaps on hydrofoil craft actually change the AoA/increase lift by increasing camber- which does often increase drag but not in the way you mention, and an automatic way to my eye would be much more efficient than the current 'human powered' system used on kitefoilers, which also increase drag when lift is increased. 

 

In addition, 99% of fully submerged sailing hydrofoilers have had the flaps on the front wing, Bethwaite's canard 49er foiler(which met with lackluster success) is the only craft I know of with the flap on the rear wing.