A hydrofoil craft, particularly a method of economically modifying a conventional
hull with cambered foils to obtain and calculate increased lift from dense spray
and to achieve enhanced craft performance is disclosed. The present invention improves
speed, fuel efficiency and rough water stability, reduced pitch and vertical accelerations.
A catamaran or V-bottom hull (20) is modified with chine mounted aerofoils
(32, 33, 28, 28A), flexible dihedral cambered foils positioned beneath the
water line and on either side of the bow (30, 31) so as to create turbulence
in the forward end of a tunnel(s) (26). Fixed forward tunnel cambered foil(s)
(28) and/or fixed or adjustable center tunnel cambered foils at the stern
(28A) end of the tunnel (26) to generate lift from pressure caused
by dense spray in the tunnel(s) (26) may also be provided.
