KissCut-new Swiss Foiler

Harry has only three foils, two immersed, windward one flying clear - but yes, I'm changing to a total of four, three immersed, finished shaping the dagger this morning. But that is by the by, the point about Happy Feet's shifting module to weather in light airs (to lift windward hull somewhat) is definitely a plus for the usual sticky catamaran configuration. Good idea. In heavier breeze, module to leeward and gaining righting moment from crew and hull to windward, also good stuff. But, for a little extra complexity in conventional angled foils through hulls, why not have foil cases that can alter angle of attack through, say 12 or so degrees? Then you could lift windward hull in quiet winds too, heavier breeze as per normal angles of incidence. Has been done before on F40"s like Biscuits Cantreau - and a way, way simpler system than Arnie's sliding foil module. Eh? But yes, three foils - but so what?

 

=====================
Sounds complex-but worth thinking about for some applications. Well, lets see if I remember my basic math: 3 is 1 more than two,right? Thats a 50% gain in weight and maybe drag for no gain in performance compared to two foils. So I guess 2+1=(-3) -in this particular case only......right???! Huh?
---
Oh yeah and then there's this: http://www.boatdesign.net/forums/multihulls/veal-heel-multihull-foilers-28372-3.html#post311238

 

No, wrong Doug - comparing Arnie's module hard up against the leeward, or windward inwhale (and the foil is central in the module, so it is still placed, say, 300 mm towards platform centre) to an angled foil set through the hull bottom, what is that? another 400mm wider foil base, that equals much greater leverage affect, okay? Also you can't talk about weight difference between an extra foil or two plus cases to the sliding Happy Feet module - which has to much heavier.

 

-----------------
Doesn't hurt the Decision 35 much and I'll have to agree to disagree on the other. The two foils are significantly less drag.....

 

Uhhhh, best of luck there, Gary. When someone is dead set on forcing a square peg into a round hole, best to let them go at it with their toy hammer and keep your distance.

The one that I marvel at is the obvious juxtaposition of the Swiss thing with the Japanese thing. One one, the thingies out on the ends of the sticks are buoyancy pods and on the other, they are part of a trimaran.

Very funny stuff with fabulously adaptable nebulous nomenclature that can be swapped at will to suit the needs of the speaker.