DSK wrote:



MC wrote:


Your mistake is you you thinking you had posted anything except a
series of questions.


Oh? Let's see, did I post a bit of further explanation after Jax fell
short on tip vortex? It's in my "sent" file. Or did it go right over
your head?


... In fact, this is correct in so far as it shows that you don't know
what you are talking about -as I pointed out.


OK, in that case prove it. You explain 1- how tip vortex forms 2- your
calculations as to which represents a greater energy loss... flow
effects across the upper main from a frac jib, or combined tip vortex
from main + masthead jib.

If you can't explain it clearly, then you're bluffing. There is no third
alternative, is there?


There is. That it would be a complete waste of my time trying to post
something you do not have the education to understand. Thus your post is
just another troll by you that is neither clever not amusing to reply
to. As for the answers to these questions #1 has already been posted by
Jax and others many times (but you didn't seem to understand it) and #2
has no answer unless you define the exact masthead rig and fractional
rig for comparison. If you wanted to enage your pitiful intellect for
just a second you might wonder why all the rig test show that optimal AC
genoa heads are near masthead. Pay me the money you owe me and I'll even
have student here run it in our advanced yacht sail design wind tunnel
facility for free for you.

Cheers