These were soon removed and a mock up of a proposed six-cannon armament was fitted, three in each wing. However the new wing gave less than perfect handling characteristics and so the Mk 23 was never built from the Mk 22 airframe as intended. The new engine had a lower thrust-line than the Merlin and was set with 2 degrees of downthrust. The Mk 22 was identical to the Mk 21 in all respects except for the cut-back rear fuselage, with the tear-drop canopy, and a more powerful 24 volt electrical system in place of the 12 volt system of all earlier Spitfires. Although designed as a fighter-interceptor aircraft, the Spitfire proved its versatility in other roles. Views Read Edit View history.
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