I believe I should point out that it was only the four-gunned B and C model Mustangs which were plagued by jamming guns. In those versions, the weapons were mounted at a thirty-degree angle within the wings, and during tight turns, the binding effect on the ammunition belts of the G forces would cause at least three of the four guns to jam. The 354th Fighter Group solved this problem by "liberating" ammunition booster motors from a nearby B-26 Marauder outfit; possibly other units did the same, but I don't know. On the D model--the "bubble-topped" Mustang--the guns were mounted upright, which solved the jamming problem by smoothing the flow of the belts into the machine guns.Kristian wrote: ...Four cal.50machine guns (in the Mustang B version) or six (in the D version) were actually enough to shoot down any opponent in the airwar over Europe, regardless of the fact that the wing-mounted Brownings tended to jam ...
Kristian
The .50-caliber "Ma Deuce" was one of the best aircraft weapons of the war, and the decision to arm nearly all US fighters with a sextet of "Fifties" was one of the best decisions made by the USA in WWII.
Yours,
Paul