There was no cupola for the commander who instead had a flat hatch with the periscope mounted through it. Early production vehicles had a "semi-internal" cast gun mantlet, which was quickly replaced in production by a better protected larger cast mantlet with three vertical slits for the main gun, a coaxial Besa machine gun and for the sighting telescope. The turret was polygonal-with sides that sloped out then in again-to give maximum space on the limited turret ring diameter. The auxiliary turret was awkward to use and was often removed in the field or remained unoccupied.īoth the A13 Mk III Covenanter and the A15 Crusader designs used the same main turret. At the left side of the front hull-a place occupied by the engine radiator in the Covenanter-was mounted a small hand-traversed auxiliary turret armed with a Besa machine gun. Covenanter used a brand new engine design, whereas Crusader adapted the readily available Liberty engine to fit into a lower profile engine compartment. It had a different engine from the Covenanter, different steering system and a conventional cooling system with radiators in the engine compartment. The hull sides were built up of two separated plates, with the suspension arms between them. The 32 in (810 mm)-diameter wheels were of pressed steel with solid rubber tyres. Unlike earlier "Christie cruisers" (A13, Marks III and IV and the Mark V Covenanter) that were built with four road wheels, Crusader had five road wheels each side to improve weight distribution in a tank that weighed almost 20 tons instead of the 14 tons of the previous cruisers. Despite a later start, the pilot model of the Crusader was ready six weeks before the first Covenanter. Both tanks were ordered "off the drawing board" without building prototypes first. Although Crusader is often referred to as an improved version of the Covenanter, in fact it was a parallel design. This new tank was adopted as "Tank, Cruiser, Mk VI Crusader", under General Staff specification A15. Nuffield, however, preferred to work on its own version of the A13-though it still provided design work for the Covenanter's turret. Nuffield was, in 1939, offered the opportunity to take part in the production of the Covenanter. To this end, the A13 Mk III cruiser tank, which would enter service as the "Tank, Cruiser Mk V" (and known in service as "Covenanter"), was designed by LMS. Looking for a lighter and cheaper tank to build, the General Staff requested alternatives from British industry. In 1938, Nuffield Mechanizations and Aero Limited produced their A16 design for a heavy cruiser tank based on Christie suspension. Retained in service because of delays with its replacement, by late 1942, the lack of armament upgrades, plus reliability problems due to the harsh desert conditions and the appearance of Tiger I heavy tanks in the German Afrika Korps, saw the Crusader replaced as the main tank by US-supplied M3 Grant and then by the M4 Sherman medium tanks but it was retained in combat use until the end of the war in North Africa and after that for training in Britain. As part of the 1st Armoured Brigade, the Crusader was to prove vital during the Second Battle of El Alamein, at the siege of Tobruk and in the Tunisia campaign. This variant was more than a match for the mid-generation German Panzer III and Panzer IV medium tanks that it faced in combat. The main armament for the Crusader Mark I and IIs was a 40 mm Ordnance QF 2-pounder gun the following Crusader Mark III was fitted with a 57 mm Ordnance QF 6-pounder gun at the expense of one member of the crew in the turret. The following Crusader Mark II had a maximum armour of 49 mm (1.9 in). The first Crusader Mark I tanks entered service in 1941 and though manoeuvrable, they were relatively lightly armoured and under-armed. The Crusader tank would not see active service beyond Africa but the chassis of the tank was modified to create anti-aircraft, fire support, observation, communication, bulldozer and recovery vehicle variants. Over 5,000 tanks were manufactured and they made important contributions to the British victories during the North African campaign. Crusader, in full "Tank, Cruiser Mk VI, Crusader", also known by its General Staff number A.15, was one of the primary British cruiser tanks during the early part of the Second World War.
0 Comments
Leave a Reply. |