(made in 1984)
The S4 Racer was originally based on a standard S4 with a package of options added, these including the mylar leading edge, airfoil kingpost and control-frame sides and 8 undersurface battens. However a variable billow system has put the machine into a class of its own. Decreasing the nose angle increases the billow, improving the handling at the expense of speed, thus the low setting is selected for thermalling. When leaving the thermal the pilot can select the maximum nose angle and by tightening the sailcloth decrease the drag coefficient substantially, making the S4 Racer one of the fastest hang gliders in the world, despite it's friendly handling characteristics.
S4 Racer. Price £1115.00 inc VAT.