GregP
Major
Well I disagree.
It's OK if you disagree. Nobody ever said we all have to agree. The P-51A worked out just fine in combat and was still flying at war's end. The Merlin gave it a much better ceiling, but the P-51A was still faster down low.
I can tell you this from working on them. North American products are very well built, and have solid systems in them. There is no apparent "jury-rigging." Everything fits and is robust. That doesn't happen by luck. It happens from solid engineering and good production line processes.
One change from P-51A to P-51B, other than the obvious engine change, and on was metal ailerons and elevators. All P-51s had fabric rudders. The difference between the metal and fabric wasn't very apparent until the speed hit above about 300 mph, and then the metal didn't deflect like fabric, so the non-deflecting metal gave the later P-51s better roll and pitch at higher speeds than the fabric surface did. At under 250 mph, there was little to chose between them.
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