. "The General Avia F 22 Pinguino was designed by Stelio Frati and is his 22nd design. The aircraft has been manufactured in four configurations, the \"A\" model with fixed gear, 116 hp Lycoming (O-235-N2C), & fixed prop, the \"B\" model same as the \"A\" but with uprated 160Hp Lycoming engine (O-320-D2A), the \"R\" model with retractable gear, the same 160 Hp Lycoming (O-320-D2A) and the \"C\" model with retractable gear, constant speed prop, and 180 HP Lycoming (O-360-A1A)."@en . .