Wrong Wilbur, saw it up close, within 20 odd feet, no repeat no,
auxilliary power involved - straight gearing from windmill, large, to prop.

Vessel was an Iroquise catamaran and when I say the windmill was large
read personal ego, (Yours) proportions.

Max speed into wind apprx 3 knots in force 4, downwind max speed approx 3.5.

I suspect the answer lies in the relative viscosity of the media.

Seeing is believing.

Tony Cook

Can't resist feeding him Andy - He's having a hard time, no double
meaning intended.

TC