DSK wrote:

Not enough draft in upper sections


The navigator© wrote:
You must be used to really baggy sails.


Actually, no. I'm used to lightweight dinghy where the max depth of
the chord is only 12%. But in this case, the issue isn't bagginess
at all. It is the simple fact that a well cut sail will be
relatively deeper in the upper sections.

In any event, in light air, a big round section with a relatively
flat entry will keep attached flow and build up much more power
than a draft forward conventional airfoil shape.

There we disagree, in ligh airs the angle of attack of the leading
section must be close to zero to attach flow. Hence it should be full.
Surely you would agree that aeronautiucs shows that deeper foils
generate more lift at low speeds....





Leach closed.

No it isn't. You cant tell the twist from that camer angle


I can see the topping lift, whih is presumably straight, and the
distance from the battens to the topping lift does not appear to
increase towards the middle of the sail.

You are forgetting the roach...

Also, it appears (could be
due to camera angle) that all the battens are at the same angle.

Yes it's the camera angle. the top tell tale could not be flying at 33
deg app. if there was no twist.

Looking closely, I can see what might be leach ribbons flowing.
That's a good sign.

Yes they are, and it is.


Why do you have a backstay antennae and no wire to it? Is the
wire lead up the mast and to the antennae at the top?

Well spotted. The wire is off.


OK, that's allowed

It's a good idea until you go offshore. Means that the connections don't
'weather' until they are needed.

Cheers MC