After the Flexifoil had become established as a dynamic stunt kite and stackable power source, many test were carried out on land and water to use it to harness the wind. In the mid to late 1970's Ray & Andrew spent time in the fields in Eastern England with a not unfamiliar kite propelled craft. Opting for rear wheel steering and winch controlled Flexifoils, they were often seen careering across farmland. Sometimes in control, sometimes acting as a wind powered harvester! Though the rig shown is set up for one man piloting, it was often set up as a two man craft. The winch kite steering gear was used very successfully on Jacobs Ladder, the speed sailing catamaran operated by Ian Day. This boat still holds a world record for a sail powered vessel.