The aircraft was a high-wing cantilever monoplane with a fixed undercarriage. The large fuselage had a tailboom and tailplane with twin fins. The tailboom allowed access to the rear of the fuselage through removable clamshell doors. A 36 ft (11 m) main fuselage space was supplemented by passenger accommodation in the tailboom. The main cargo hold could accommodate 94 troops, with another 36 in the tailboom. In operation, it was regarded as "ungainly but highly effective" and was described by Air Chief Marshal Sir Robert Freer as "like something out of the Ark, but it was a superb supply dropper." A device called an Elephant's Foot could be fitted under the centre of the fuselage just forward of the clamshell doors when loading heavy items to prevent the aircraft from tipping back. The aircraft was designed for carrying large bulkloads and landing on rough or imperfect runways, or dirt strips. It could trace its design back to the GAL49 Hamilcar glider of the Second World War. When it entered service it was the largest aircraft in the Royal Air Force (RAF). It had a large cargo hold of about 6,000 ft3 (170 m3). Paratroopers in the upper passenger area jumped through a hatch in the base of the boom just in front of the leading edge of the tailplane. Paratroopers in the cargo hold exited through side doors. For more details including operational history and variants, click here.