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?


MC wrote:
There is. That it would be a complete waste of my time trying to post
something you do not have the education to understand.

In other words, it's #2...


.... As for the answers to these questions #1 has already been posted by
Jax

Umm... no. I asked "Of A or B, which is better" and Jax said "yes and no."

... and others

Like who?

... many times

Golly, you can't count either.

... and #2
has no answer unless you define the exact masthead rig and fractional
rig for comparison.

OK then, what factors would affect which one is better?

...you might wonder why all the rig test show that optimal AC
genoa heads are near masthead.

I had that in mind, but those boats are influenced by measurement rules
also.

.... Pay me the money you owe me

You got that backwards too... par for the course.

.....and I'll even
have student here run it in our advanced yacht sail design wind tunnel
facility for free for you.

Oh boy... will you really do that? Put it on the list for right after
they run a simulation of a wave approaching a hull from astern to show
how the transom keeps a wave out... maybe they'll explain 'reserve
bouyancy'... right after they finish laughing...

DSK