From Janes 57-58.
THE TWIN PIONEER.
The Twin Pioneer is a 16-passenger light transport, which uses standard Pioneer wings attached outboard of a new wing centre-sec tion. The Prototype first flew on June 25, 1955 and the first production Twin Pioneer flew on April 28, 1956. An unspecified number of Twin Pioneers have been ordered for the Royal Air Force. Other firm orders include one for Rio- Tinto Corp. for aerial surveys; three for de Kroonduif, the Dutch New Guinea associate of KLM. one for the Zinc Corp of Australia, two for Kuwait Oil, three for the Royal Iran Flying Club one for the Austrian Government, and two jointly for the governments of Sarawak, North Borneo and Brunei. In addition, Philippine Air Lines have ordered five Twin Pioneers powered by Pratt & Whitney R-1346 Wasp engines, the change in power plant requiring little modification to the aircraft.
PERFORMANCE (civil)
Max speed at 1,450 ft 165 m.p.h.
Max continuous cruising speed at 3,400 ft 163 m.p.h.
Stalling speed 60 mph.
Service ceiling 18,800 ft.
Take-off distance to 50 ft. 1,017 ft.
Landing distance from 50 ft 1,170 ft.
Range at cruising speed of 119 mph, at 5,000 ft. 916 miles.