The seat on my IC can be moved aft about 4ft or so. I rarely move it aft more than a foot or so in moderate conditions, but in when it is...
I think it may be wrong to judge the success, or not, of multihulls as a choice for the AC based on the last series. The major criticism I've...
My mistake. I found another source that says 16,000 kg. However, the actual figures are not that important. The order of magnitude is.
Hardly. Displacing air with helium saves about 1.1kg/m^3. Even if you could fill the entire main hull with helium, which you can't, you would be...
I'm not sure if this is entirely relevant to this thread. I built a model proa a few years ago which had an articulated cross beam. The sail was...
Doug, Take off speed (boat speed) should be?? similar to Moth take off speed, as per my figures submitted earlier in this thread, with about...
Sail area restricted classes already exist in the speed sailing arena: 10 sq m (up to and including 10 sq m) A Class (from 10 sq m up to and...
Phew, you had me worried there for a minute! I wasn't expecting cavitation to be an issue at 8 knots.
Doug, The 10 degrees is at take off speed, however, because it is a surface piercing foil, it could be left at that and you get the drag...
Doug, For the main foil I used the following: Section lift coefficient (Cl)- 1.2 Section drag coefficient (Cd) - 0.022 Section angle of...
For those interested in numbers, I have been doing a bit more analysis regarding the feasibility of putting foils on a laser. Attached is a graph...
Doug, Thanks for sharing that info. As I mentioned earlier, while I was considering the hybrid system, and I think it does have some merit, I...
Chris, I sailed Vee jays around that time (1976), but I don't recall that Nu Hissy had a stepped hull, unless steps were added later? I forget the...
Bill, I can't disagree with any of your comments, but my goal is not not quite what you suggest. The idea of putting my laser up on foils grew...
If you are right, then some washout may be required at the tips. In any case, I was planning on using a significant amount of forward rake on the...
Doug, That is sort of what I had in mind, but I envisaged that the "winglets" would be proportionally at least twice the length of those shown...
Recently, I've been thinking that it might be possible to devise a semi surface piercing foil, basically a flapped T-foil with long surface...
Karl, You could probably approximate the section with composite shape made up of rectangular sections. The more sections, the more accurate it...
Many years ago, I had a similar idea to the one proposed by Ancient Kayaker, the only difference being that I had the "sailing machine" at the aft...
I would go for the filleted version as it has less frontal area (less form drag) and is probably just as strong as the ellipical version. Mal.
