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October 1942. P-51 "Mustang" fighter planes being prepared for test flight near the North American Aviation plant in Inglewood, California. View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.
These aren't "original" Mustang Mark I's, but rather Mark IA's, USAAF equivalent is P-51 (no alpha suffix ). Mk. I's had two .50 calilber MG's under the chin and a .50 caliber and two .303's in each wing, for a total of eight. They were exported for use by RAF and RCAF. The four 20mm Hispano was, as you have mentioned, on the P-51/Mk. IA.
Notice the long fairings for guns, 2 for each wing. These are original Mustang I's, armed with two 20 mm Hispano cannons per wing. They were only shipped to Britain, and mounted the Allison engine. With the heavier armament and engines tuned for lower altitudes, they did not impress the Brits at all.
Once the beautiful airframe was matched with the outstanding British Merlin engine, one of the wars premier fighters was born.
My uncle worked on these during the war. He told me that they ran straight antifreeze for coolant.
Great picture of one of my favorite WW II planes, I would love to fly in one. Oh, by the way uncle Ignatz is still staring at me and anyone else on your blog, with that wonderful happy smile!!! I think he likes it here!!
...that's marked "FD-533" would seem to be the former 41-37435 that was transferred to the RAF. If so, that particular plane was lost on a tactical reconnaissance mission on 26 September 1943.
Allison-engined, that is. These early Mustangs also have the straight canopy that pre-dated the bubble canopy that was installed on the D models.
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