The General Aircraft Limited GAL.49 Hamilcar or Hamilcar Mark I was a large British military glider produced during the Second World War, which was designed to carry heavy cargo, such as the Tetrarch or M22 Locust light tank. When the British airborne establishment was formed in 1940 by the order of Prime Minister Winston Churchill it was decided to develop a large glider which would be able to transport heavy equipment in support of airborne troops. General Aircraft Limited were chosen in January 1941 to develop this glider, which they designated the GAL.49 'Hamilcar'. It was designed to transport a light tank or two Universal Carriers. A number of problems, which included vacillation by the War Office on the number of gliders it wanted and poor management by GAL, led to delays in the production of the Hamilcar and it was not until mid-1943 that the first production glider was assembled. These problems were only partially solved and production of the glider continued to be slow, hampered by difficulties in finding suitable locations to store and construct them once their parts were produced. A total of 344 Hamilcars had been built when production ended in 1946. Hamilcars were used on three occasions,and only in support of British airborne forces. They first saw action in June 1944, when approximately thirty were used to carry Ordnance QF 17 pounder anti-tank guns, transport vehicles and Tetrarch light tanks into Normandy in support of British airborne forces during Operation Tonga. In September 1944 a similar number of Hamilcars were used to transport anti-tank guns, transport vehicles and supplies for airborne troops as part of Operation Market Garden. They were used a third and final time in March 1945 during Operation Varsity when they transported M22 Locust light tanks and other supplies. The gliders proved to be successful in all three operations, although their slow speed and large size made them easy targets for anti-aircraft fire, which resulted in a number of gliders being damaged or destroyed. A powered variant of the Hamilcar was produced, the Hamilcar Mark X, to extend the range of the Hamilcar so it could serve in the Pacific War; the conflict in the Pacific ended before the design could see combat. The Hamilcar was constructed primarily from wood, mainly birch and spruce, with fabric-covered plywood forming the skin, and high grade steel reinforcement beams in critical areas. It had a wingspan of 110 feet (34 m), a length of 68 feet (21 m) and a height of 20 feet (6.1 m) to the top of the fin with the tail down. It weighed 18,400 pounds (8,300 kg) when empty, and could transport a military load of 17,600 pounds (8,000 kg) to give a total weight of 36,000 pounds (16,000 kg). The whole aircraft was broken down into smaller sections for transport. It was so large and heavy that it required the largest and most powerful aircraft to pull it off the airfield and subsequently tow it; four-engined bombers were used, most frequently the Handley Page Halifax. Both wing and cockpit were set above the fuselage to provide the greatest amount of room for the cargo compartment, and to ensure that they did not interfere with the loading of vehicles; the compartment measured approximately 32 feet 31.5 inches (10.554 m), 7 feet 10.5 inches (2.400 m) inches wide and between 6 feet (1.8 m) and 7 feet 7 inches (2.31 m) inches in height. The nose of the glider was hinged and opened to the side for ease of loading vehicles and cargo, and the crew of two pilots were seated in tandem in a cockpit on the top of the fuselage, which was accessed via an internal ladder and was fifteen feet above ground; they were eventually protected by a bullet-proof windscreen and a plate of armour behind the second pilot. An intercom was also added to provide communication between the pilots and the personnel below them. An initial design feature, which was eventually removed prior to full-scale production, was the installation of an under-fuselage hatch which would allow the prone firing of a Bren light machine gun as the glider approached the landing zone. When the parts for a Hamilcar were completed and the glider was erected, it was flown to RAF North Luffenham in Rutland to have its specific cargo placed on board, and it was then flown to RAF Tarrant Rushton, which had been selected as the Hamilcar training and operational base in November 1943. It was not possible to tow the glider empty, so any empty gliders usually carried Universal Carriers or concrete blocks as ballast. For more information on the development, design, operational history and variants of the Hamilcar, click here.
