This Neilpryde RS Flight F4 Carbon Windsurfing Foil is incredibly light, stiff, and is a fantastic tool to let you make use of the lightest of winds.
The 2017 Neilpryde RS FLIGHT F4 Foil is delivered with two front wings for two flight modes. The High Lift Wing combines early take off and exceptional upwind performance, with amazing stability. The High Speed Wing delivers maximum speed and acceleration.
For more info, check it out on the neilpryde website also.
Looking for something on a lower budget? Check out the aluminium version of this foil on our website.
DEEP TUTTLE BASE
INTEGRATED TAIL-FUSELAGE CONNECTION WITH SCREW-ADJUSTABLE TAIL TRIM ANGLE
This feature minimizes the drag at the end of fuselage. It also provides a very strong connection through opposing screws countered in tension. There is also +/- 1.5 degree (total 3 degree) adjustability available by changing the tension of the front top and bottom screws. Foil is perfectly trimmed for average weight sailor (75-80kg) with tail in neutral position. Heavier sailors, especially with large front wing in light winds or during learning process might prefer slightly more stabilizing force that down tilted rear wing provides. At the same time lighter sailors, especially in strong wind conditions might find a neutral position creates excessive lift and will reduce the differential angle between two wings by tilting the tail slightly up.
SMOOTH RADIUS INTERSECTION POINTS BETWEEN MAST AND FUSELAGE
At the most critical loading stress points (shaft leading and trailing edge-to-fuselage connections), a large radius is maintained in the corners. This has a benefit of distributing tremendous compression forces existing in this area while at the same time creating a very smooth shape which minimizes turbulences common to hard edges.
SINGLE PIECE MAST/FUSELAGE T-CONSTRUCTION
Construction of the Neilpryde RS FLIGHT F4 Foil features solid pre-preg carbon fiber layup with continuous unidirectional fibers connecting the shaft (mast) to the fuselage. This is by far the strongest and stiffest connection possible which also allows to keep the shaft and fuselage cross-section minimal, reducing the drag. This construction offers the best strength to weight ratio.
Fuselage is designed with the unique cross-section taper where the maximum volume is concentrated in the areas of highest loads. The thickest section is connecting front wing mounting area to the mast intersection; this is the area that transfers the lift of the foil onto the board and supports the complete weight of the sailor, board and rig.
BLENDED FUSELAGE TO WING CONNECTION
During carving, there can be extreme torsional forces at the fuselage-to-wing connection area. These forces are created by different lifts on the two sides of the main wing. Part of the wing that is inside the curve experiences lower water velocity and creates lower lift. On the opposite side, the wing sees higher water velocity and creates higher lift; this differential in lifts, particularly extreme when using large wings, results in very high torsional load. To make sure there is adequate strength to support this stress, even with heaviest sailors, we designed a very large and wide connection area. This ‘saddle’ distributes torsion force over a larger area and significantly reduces the torque leverage on the wing screws.