A question about Moff foils....

Downward-facing winglets already in action at the worlds - this is Ben Paton comparing his foil to world champion Bora Gulari's.

One of our illustrious contributors ..........could invent a system to alter tip angles from within the boat..........

From what I have been told the Moth foil has pretty much reached its optimum.

Needs to be smaller to reduce drag to go faster, but when it gets too small needs more wind to get up - hence why theres an optimum size or you need two sets of foils at £(insert very high figure here)k  for varying wind conditions.

Would wing tips would add drag as water is thicker than air and reacts differently to a plane wing??

Also if it has plates on the end when the boat was healed, as its generally sailed, would the water rushing over a vertical plate now at an angle affect the line it was taking?

Planes fly 'flat' in a straight line, boat foils are not 'flat' to the water when trying to go in a straight line.

From +15 to -7deg or so. The boundary layer is artifically tripped to turbulent bl before it reaches the flaps as it is a lesser evil than flow seperation.

But you are right a big effect is to level the fuselage over the speed range reducing trim drag.

Originally posted by aardvark_issues Gliders can't change wing camber, so they're looking for big lift in a different way.edit, And the tips break out of the water sooner if they're pointing up. Pointing down is being used though.

Err if you look at the picture of the eta (the one on the ground) you will see full span camber changing flaps along the trailing edge err leech

Edited by hobbiteater - 06 Nov 13 at 9:02pm