 The leading edge carried slats in three sections to form slots across the whole span when extended.The inboard pair were opened when the flaps were lowered and the outer slots were automatic, with interceptors connected to the ailerons for lateral control at high angles of attack.Behind the radial Bristol Pegasus IM3 engine, producing 650 hp (485 kW) and enclosed in a Townend ring, the semi-monocoque, corrugated-skinned fuselage grew in diameter to the pilot's midwing cockpit then remaining constant rearwards to the gunner's position.