another non-use of helium This would spoil all the fun. We had all these uninformed speculations that would be instantly deflated, no pun...
Nitrogen It's interesting to listen to a bunch of sailors talking about race tires. If you take humid air and compress it the partial pressure...
Itd You guys are all suffering from ITD. Sailors love special vocabulary, so I invented this TLA (Three Letter Acronym) just for the occasion....
You're right of course and I have that book. I think I got a little ahead of myself, because I dove into JavaFoil and started playing with two...
I tried 51, 101, 201, 401 and 801 points. The polar seemed reasonably stable between 401 and 801, but it does run slower at 801. At Re = 1e6 it...
Reynolds number and foil points Rick, Thanks for the reply and the link. I think the link covers JavaFoil vs Xfoil pretty well and leaves me...
I've thought a little more about this. Some (most?) of the composite materials are better in tension than compression. You probably also need...
No shortage of insults on this forum. Is a reasonable answer ever expected?
It didn't seem to get much notice, but I read a statement that the M2 was designed to carry more load on the the rear foil. I suspect I could...
Yes, it seems to me too that Bill and Doug are agreeing. But, while English is my first language, I won't claim any expertise there and I'm happy...
$'s per second There are one or two areas where AC rules, in the past, limited technology to control costs. Hard as that is to believe. With...
JavaFoil doesn't match I've been a little concerned that I was getting separation at what seemed like relatively low lift coefficients when I've...
Actually, I think we agree Since we are talking about "America's Cup: what's next?", does anyone hope that there are engines powering the rig...
tactics-technology-spectacle As a sailor I like the tactics and particularly the start. As an engineer I like the technology, but if you want...
I added a couple more lines to the graph I stole from Tom Speer to compare the effect of sealing the bottom to adding aspect ratio. If you seal...
Practicality and common sense probably doesn't include skiffs, A-cats, IC's and a bunch of other cool boats too. Certainly not a Volvo 70, or G3....
Wait, that's too easy! On many boats the boom position is hard to lower, but some skiff boats have that extension from the below the boom to the...
The top is where people first think of doing something, but in addition to adding weight, it also moves the center of effort up which is not so...
The bottom of the sail This thread is almost 2 years old, but I couldn't find any newer ones that were as close to what I've been thinking about....
You would probably be best off looking here: http://www.boatdesign.net/forums/design-software/savitsky-power-prediction-2187.html
