Quote:
Originally Posted by BadAim
The fact is that the .50 (and the excellent Browning machine gun that fired it) was also the weapon at hand and it did it's job well, given the targets it was asked to engage.
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The problem is that the .50 did not do it's job well. It was adequate, but nothing more. Bout the USAF and USN wanted 20mm, the Navy so desperately that they were willing to ignore the reliability problems of the US-made M3.
For the USAF the problem was not so much lack of destructive power, as much as weight. They compensated for the lack of power of the .50 by adding more guns, but the Browning was a heavy gun (29 kg). In a plane like the Thunderbolt, it did not matter much, but the Mustang was really pressed to the edge weight-wise. If the Mustang had a Hispano in each wing, it would have had just a little bit less firepower than it did with 6 Brownings, yet would weigh roughly 100 kilo less (depending on whether we are talking Hispano II or V). Imagine a 100 kg lighter Mustang!