Shape: Challenger of Volker Behrens. Airfoil: Michel Dufayard (Razorback Boomerang - club des Francas) Total leaded/unleaded weight: 136g / 112g. Lead on elbow: 3g Trailing wing lead: 21g. Throw: 45° at the right of the wind. Layover: 30° to 45° from the vertical. Always begin to cut the undercut of the trailing edge (from 1 to 1.5 mm). With 3g at the elbow and 14g at the trailing arm you should reach 130m with some wind. Michel Dufayard throwed it at 149m at Shrewsbury.
