Topdressing market, prototype built by Fletcher Aviation, large scale production in New Zealand. T-16 - 1956-58 180 hp, Piper Cherokee preliminary design. PA-28 first built with . T-17 - 1958 Wing Derringer original design. Began as twin engine Skooter. 1960s T-18 - 1960 All metal two place, high performance homebuilt. Don Taylor's T-18 was first homebuilt to fly around the world. Clive Canning flew his T-18 from Australia to England and return. T-19 - 1962 Design study - Four place, twinjet aircraft using Williams Research engine. 1970s T-20 - 1971 Design study - Single place, open cockpit sport plane T-21 - 1971 Design study - Utility airplane. T-22 - 1972 Design study - Sport plane. T-23 - 1972 Design study - Single place high performance sport plane. SE5-F 1973 WWI replica - Prototype built. T-28 - 1974 Design study - Two place, twin engine airplane based on the T-18. References External links Designer Spotlight: John Thorp – Kitplanes American aerospace engineers 1912 births 1992 deaths People from French Camp, California Engineers from California 20th-century American engineers