 In the 1950s, Ron Hankin designed a featherbed-inspired Moto Cross frame for Les Archer junior, having curved downtubes to allow for greater front suspension movement without fouling the wheel on the frame, and with heavy bracing around the steering head tube.The frame was used with Manx Norton engines prepared by tuner Ray Petty, and also with a 500 cc Norton Dominator engine.Weight and strength were key factors in the design of the featherbed frame for the Norton racing team's Manx.