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Forces on sail
Force measurements on a sail ("opitmist" boat)
Force measurements at various angles of attack
Three cameras for recording the shape of the sail (left). Infra red light reflectors on the sail surface
Lift coefficient versus angle of attack for four shapes of the sail
Six component piezoelectric balance
Four sail shapes recorded through 3 cameras
Sail cross-sections at various horizontal planes and four shapes of the sail
Drag coefficient versus angle of attack for four shapes of the sail