NASA. The Redhawk wing featured movable leading edge devices, Fowler flaps and spoilers for roll control. In 1970 he negotiated with Pierre Clostermann to have Reims Aviation install Robertson STOL kits onto production Reims F337 Skymasters. In 1973 the expanded Robertson Aircraft Company was sold to an investment company, and Raisbeck left. He worked for one year for Allen E. Paulson at American Jet Industries in Los Angeles as vice president of technology. Deciding he wanted to start his own company, he founded Raisbeck Engineering in 1973, on his dining room table, with $500. His first project was the task of redesigning the wings of the Learjet for Gates Learjet. Clay Lacy had introduced Raisbeck to Dee Howard, founder of Howard Aero and The Dee Howard Company. Having problems with the wing redesign, Raisbeck became partners with Howard in February 1975, to enable him to complete the development of the Mark II system. The modification was intended to reduce the approach and takeoff speeds of the Learjet family. With Howard's help, he finished the program and Gates Learjet adopted the Mark II wing's principles in 1976. The system's enhancement of the low-speed Learjet flight characteristics and short runway performance led Gates Learjet to adopt the highly successful technology on new production aircraft, beginning in 1976. In 1976 Rockwell contracted Raisbeck to redesign the wing of its Sabreliner series. All production Sabreliner 65 aircraft would be equipped with supercritical wings to be developed by Raisbeck, and Sabreliner models 60 and 80 would be retrofitted. The resulting Mark V wing was the first supercritical wing in service in the United States. Raisbeck built all 75 wing sets for the Sabre 65 in Seattle, and shipped them to Rockwell in El Segundo, California. His company now had 750 employees, most working on the supercritical wing program. Although the program was a technical success, by 1979, Raisbeck's company was in financial distress. Raisbeck declared bankruptcy in 1979. On his own, in 1979 he developed the Mark IV Wing System for the Learjet 35/36 family of aircraft. This system reduced the aircraft's approach speeds, increased the level of operating safety. Raisbeck regrouped and reformed his company in 1981, with five employees. His vice-president, Joe Clark, arranged a deal with Morrison-Knudsen and got Raisbeck started on developing the Mark VI system of performance enhancements for the Beech Super King Air. Clark would later go on to