GENERAL AIRCRAFT MONOSPAR ST-25

The General Aircraft Monospar ST-25 G-AGDN, used for much of the war as a runabout by General Aircraft Ltd. Left: The ST-12 G-ADBN was one of two of this type impressed, serving as BD150 until April 1942.

GENERAL AIRCRAFT MONOSPAR ST-25 - Improved General Aircraft Monospar twin evolved in 1935 and known as the Jubilee model, with 90 hp Niagara II engines, fixed undercarriage and five-six seats. Two sold to RAF for radio equipment trials at RAE, continued in wartime service with four civil examples impressed for AACU use. General Aircraft Monospar ST-25 Universal appeared 1937 with twin fins and rudders; nine examples impressed, plus two (L4671, L4672) purchased by RAF in 1937 for communications duties and one in 1938 (N1531) with experimental tricycle under-carriage, surviving until mid-1941.

Data for General Aircraft Monospar ST-25 Universal: Max speed, 131 mph (211 km/h). Gross weight, 2,875 Ib (1,305 kg). Span, 40 ft 2 in (12.25 m). Length, 25ft 4 in (7. 72 m).