The Cunliffe-Owen OA-1 landing at Eastleigh after a test flight on May 4, 1939. Note the under-fuselage flap.

The 15-seater OA-1 was powered by two 710 h.p. Bristol Perseus XIVC radial engines.

The Cunliffe-Owen OA-1 s lifting fuselage is shown well in this air-to-air photograph taken near Southampton shortly before the war.

The layout of the OA-1's flying controls was considered good; the absence of a floor-mounted control column added to the pilot's comfort, although the control wheel rose unnaturally high when pulled fully aft.