The General Aircraft Ltd GAL 38 was designed to meet Air Ministry specification
S.23/37 which, in turn, was drawn up to meet a specific Admiralty requirements
for a carrier-based aeroplane suitable for shadowing, or maintaining contact
with, enemy fleets at night. This called for an exceptionally low cruising
speed and a long duration. The requirement to maintain contact of an enemy
fleet at night and the requirement to operate from an aircraft carrier
flight deck imposed severe restrictions on this design.
The GAL 38 was a high-wing monoplane with wings and fuselage of wooden
construction, with spars of compressed wood and plywood, spruce and
plywood ribs and an overall covering of plywood. The tail unit was of cantilever
monoplane type. Single tail and rudder, of Spruce and plywood spar and
ribs, pl ywood covering. The landing gear was of a fixed tricycle type.
The crew consisted of a pilot, observer and radio operator.
The GAL 38 was powered by four 130 h.p. Pobjoy Niagara V seven-cylinder
radial air-cooled geared engines driving two-blade fixed-pitch wooden airscrews,
in response to the S.23/37 specification which called for an aircraft that
would operate at low altitudes at slow speed, the specification called
for 38 knots at 1500 ft for not less than 6 hours.
Two GAL.38 prototypes, P1758 and P1759, were ordered, but only one was
completed, which first flew on 13 May 1940 with Niagara III engines, pending
delivery of Niagara V's. In February 1941, the Admiralty decided to cease
development of the S.23/37 aircraft, mainly because of the unavailability
of suitable engines other than the Niagara V, only a small number of which
were ever built. A proposal by GAL to produce a modified design powered
by two Cheetah IX engines was not taken up.