GENERAL AIRCRAFT MONOSPAR
ST-4, GENERAL AIRCRAFT MONOSPAR ST-6, GENERAL AIRCRAFT MONOSPAR ST-10
and GENERAL AIRCRAFT MONOSPAR ST-12 - The General Aircraft Monospar
series of lightplanes was developed from 1931 onwards to exploit a system
of construction evolved by H J Stieger, for which purpose General Aircraft
Ltd was founded. First in a family of related twin-engined light transports
using General Aircraft Monospar wing construction, the prototype General
Aircraft Monospar ST-4 flew in May 1932. Three four-seat General Aircraft
Monospar ST-4s with 85 hp Pobjoy R engines, impressed for service with
Anti-Aircraft Cooperation Units, of which one modified in 1941 to have
retractable undercarriage. One General Aircraft Monospar ST-4 impressed
by SAAF. One five-seat General Aircraft Monospar ST-6, with retractable
gear and Pobjoy Rs, and one similar General Aircraft Monospar ST-10 with
90 hp Niagara Us and fixed gear, powered by two 130 hp Gipsy Majors; two
impressed for AACU use in 1940. Data for ST-4; other variants a little
heavier and faster.
Max speed, 130 mph (209 km/h). Gross weight, 2,550 Ib (1,158
kg). Span, 40ft 2 in (12.25 m). Length, 26ft 4 in (8.03 m).
