Air Force. The plane crashed into a forest on 21 January 1958, killing the pilot (Second Lieutenant Aimo Allinen) and the winch-operator (2nd Ltn Antti Kukkonen). Variants C.X Series I : Fokker-built aircraft for the Dutch using an inline engine C.X Series II : Fokker-built, 4 to Finland C.X Series III: Licence-built in Finland, had modified upper wings which were slightly more swept. C.X Series IV : Licence-built in Finland, 5 planes which were put together from spare parts. Operators Finnish Air Force (39) Royal Netherlands Air Force (20) Royal Netherlands East Indies Army Air Force (13) Republican Spanish Air Force (2) Specifications (Fokker C.X) See also References References Bibliography Taylor, H.A.. Airspeed Aircraft since 1931. Putnam. 1970. London. 1930s Dutch bomber aircraft C 10 Aircraft of the Royal Netherlands East Indies Army Biplanes Single-engined tractor aircraft Aircraft first flown in 1933