F+W C-3605 Schlepp

The F+W C-3605, nicknamed Schlepp ("Tug") or "Alpine Anteater", was a target towing aircraft operated by the Swiss Air Force from 1971–1987. The aircraft was developed during the latter half of the 1960s by the Swiss Federal Construction Works (Eidgenoessische Konstruktionswerkstaette) (EKW), renamed Farner Werke (F+W) in 1972, as a conversion of the existing C-3603 ground attack/target towing aircraft.

Flight testing showed that the prototype C-3605 possessed satisfactory flight characteristics, and the conversion of 23 C-3603 aircraft to C-3605 standard began.[1] The aircraft were delivered by F+W between 1971 and January 1973.[4] Whilst in the service of the Swiss Air Force the C-3605s were usually painted in conspicuous yellow-and-black striped, high-visibility colour schemes.[4]

The plane operated faithfully in the target towing role, exceeding its expected 10 year structural life.[5] However, by the mid 1980s, the aging aircraft had begun to show signs of airframe fatigue.[5] This led to the decision to retire the type from service in 1987 with the surviving aircraft being sold off and replaced by converted Pilatus PC-9s in the target-towing role.

 Following a successful prototype conversion in 1968, 23 aircraft were converted between 1971–1973 with 2 still flying in private hands.