X-Plane 9.70 – XP-72 Super Thunderbolt

X-Plane 9.70 – XP-72 Super Thunderbolt. The Republic XP72 was an American prototype interceptor fighter developed as a progression of the P-47 Thunderbolt design. The XP-72 was designed around the Pratt and Whitney R-4360 28-cylinder air-cooled radial engine with a supercharger mounted behind the pilot and driven by an extension shaft from the engine. The armament consisted of six 0.5 in wing-mounted machine guns and underwing racks for two 1000 lb bombs. By Vasco Ribeiro.

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