North American XP-82A Twin Mustang

Last revised October 14, 1999

At an early stage, it was suspected that once the war was over, the Packard Motor Car Company would be unlikely to continue the manufacture of V-1650 Merlin engines. Furthermore, the Allison V-1710 had by that time matured into an engine which, without a turbosupercharger but with two stages of gear-driven blowers could give excellent performance at high altitudes. Consequently, the V-1710-119 was specified for the third and fourth prototypes, which were to be designated XP-82A.

The third Twin Mustang prototype (44-83888) was completed as the XP-82A and was fitted with a pair of Allison V-1710-119 engines of 1500 hp each, driving propellers rotating in the same direction. This change to the Allison brought the Mustang design full circle. The serial number was 44-83888. The Allison installation now looked not unlike that of a Merlin, because the -119 engine had an updraft inlet and an injection-type carburetor upstream of the two-stage supercharger, so that the inlet was on the underside of the engine behind the spinner. The inlet was about a foot further back than with the Merlin.

There is no evidence that the XP-82A was ever actually flown, due to problems with the Allison engines. The other XP-82A prototype (44-83889) was cancelled.

Serial numbers of XP-82A

44-83888/83889	North American XP-82A Twin Mustang
			c/n 120-43744/43745


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