Full composite structure

Hydrofoil Material

Current lead time is 3 weeks.

Ask us for used test samples for immediate delivery.

(prices are subject to change without notice.)

This hydrofoil is easy to ride due to stabilization design elements.

See YouTube video here...

(1) Large base to spread load and prevent damage of boards. Important if non foil ready board is used. Flange base also allows mounting the foil directly to the bottom of the board using 90mm spread screws in addition to fin box. Fits all the kite boards and some wind foil boards like Naish.

(2) Long sliding rail with threaded holes for wide range fin head adjustment along the board. Wide adjustment range allows finding the best balance without moving foot straps. It also allows for easy adjustment for different boards including kite boards. The rail takes FRPGear compatible fin heads and depth extensions to accommodate variety of fin boxes: Tuttle, Deep Tuittle, Power, USBox, Naish, and other custom or special fin boxes on different boards.

(3) Threaded Titanium inserts to connect to FRPGear adapter selected for any existing or custom fin box.

(4) Foam filled interior provided flotation and displacement. Flotation is needed in order to prevent the foil from sinking. Displacement improves light wind capability by generating additional hydrostatic lift. Foam filled design allows to achieve maximum stiffness with minimum weight. The upper portion of the foil is thicker for flotation and it does not increase drag because it remains in air while in flight. But, because it has flotation, it generates lift when accelerating to separate from water. The lower portion of the foil legs are solid unidirectional composite for maximum stiffness at minimum thickness. This design allows significant weight reduction and resulting cost saving on materials while achieving higher wind foiling results.

(5) Two autopilot stabilizers. They intend to keep the foil at optimized for the best performance. (optional)

(6) Swept forward stabilizer improves roll and yaw control by slight twist of the rear leg into beneficial direction. Practically, it helps to counterweight the force from large racing sail and roll the board more upwind for optimized angle of the wings. (optional).

(7) Connection of the front leg directly to the top of the main wing with fillet transition improves lift similar to FRPGear Fly-Fin design. The front leg makes water flow to accelerate even more in the transition area resulting in pressure reduction on the upper wing surface accordingly Bernoulli Law. In result, the lift of the main wing is increased on the FRPGear front leg direct connection unlike the traditional connection with use of fuselage.

(8) Preventing catapult because stabilizer is positioned below the main wing. Catapult happens when stabilizer gets close to water surface before the main wing does. FRPGear Y-hydrofoil allows to position stabilized below main wing without setting a fuselage at an angle, like it is done on the fuselage hydrofoils. Setting fuselage at an angle increases drag. This is not the case with FRPGear Y-foil because Y-foil does not have a fuselage.

(9) Long distance between the main wing and the stabilizer for more stability in race and for better light wind performance. Traditional hydrofoils use long fuselages for better stability. However, the long fuselages generate more drag. Y-foil does not have a long fuselage while the distance between the wings is large. Long fuselages reduce stiffness. Y-foil does not have fuselage the source for loosing stiffness.

(10)Rear leg is acting as a fin preventing spinouts. Spinouts are cavitations when the foil mast does not have enough area to support side load. Many foilers notice sudden loss of stability due to spinouts. FRPGear Y-foil has two masts (fins) under water resulting in better resistance to spinouts and better upwind performance.

fly-fin hydrofoil highlights

- 100% high strength fiber reinforced composite construction. No Aluminum.
- Best Light Wind performer: 6 kt, 7.2 m sail, 70 kg rider with 127 cm wing
- Very light weight 3 kg, and compact.
- Good for kites and for windsurfers.
- Ne need for deep mast because the foil is very stable to keep precision altitude.
- Good for shallow waters. Easy beach start without getting your sail wet.
- Easy to carry due to low depth.
- No special foil board or special fin box needed.
- Easy to learn due to low depth.
- Simple and honest warranty: return it for 100% refund - for any reasons.

There are two windsocks on the background to get an idea about the wind speed. Learn how to rad windsock here...

The second image below is high resolution. Right click on it and open in a new tab to zoom into the windsocks.

The windsocks are at about 100 feet above ground. The wind speed on the ground is about 2 knots lower compared to what the windsock reads. This makes it 5-6 knots of wind on the windsurfing sail.

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