History
Reliability, Endurance, Speed, Armour, fighting compartment design and a high velocity anti-tank gun, were priorities detailed for the design that resulted in the Cruiser Tank A34 Comet.
Based on the Cromwell and mechanically similar, The Comet was heavier with increased armour thickness. The Christie suspension was strengthened to cope with the increased weight and it was necessary to add return rollers to carry the top run of the track. It came very close to meeting the requirement for a Universal tank that was well armoured to support the infantry but still fast enough to be used for rapid exploitation.
In order to overcome the problem of accommodating the considerable length of the 17pdr’s breach, Vickers developed a modified version that was a little shorter and known as the 77mm. With similar performance to the 17pdr it used a shorter cartridge case that could be loaded within the limit of the turret ring thus avoiding the need to widen the Comets hull. The turret which was designed around accommodating the new gun was all new with a cast front section, welded sides, top and rear and an external mantlet. With stunning accuracy it could fire high explosive shells and a variety of armour piercing rounds.
Another feature not seen in previous tanks was the electric powered turret traverse system .
With design work starting in May 1943 it was given the General Staff code A34, the tank was fitted with excellent Rolls Royce Meteor V12 engine as used in the later marks of the Cromwell, giving the combination of an aeroplane engines power and lightness. The gearbox was a 5 speed Merritt Brown Type 5, with reverse.