![]() ![]() The superturbocharged engine was quite successful, and the XF4U3 could reach speeds up to 480 miles per hour at altitudes near 40000 feet. 02157, was the third aircraft converted to the XF4U-3C proto type based upon the XF4U-3 standards, but it was subsequently destroyed in a crash and did not participate in the program. The airplane could maintain the WAP ( War Emergency Power) of 2600 hp from sea level up to 38200 ft ( 8595 m).į4U-1, BuNo. The plane was flown for the first time on 20th September 1944. 49664, was fitted with a Pratt & Whitney R-2800-14W powerplant with water/methanol power boost instead and with the turbo charger installed, it became the XF4U-3B. When developmental problems persisted with the Pratt & Whitney XR- 2800-16 C engine, the F4U-1A, BuNo. It was flown for the first time on 16th or 22nd April 1944. This plane used the the birdcage canopy, the turbo supercharger was instalIed in a large fairing under the fuselage, this fairing was 50 inch large that it eliminated the catapult hooks, but this was of no consequence, since the proposed F4U-3 was to be used exclusively by the Marines as a land based fighter. The first prototype was called the XF4U-3A, and it was converted from a F4U-1A, BuNo. The change to this powerplant necessitated the use of a four-blade Hamilton Standard propeller with blades of 6501A-0 type. Plans were made in March 1942 for two proto types and a third was ordered in December 1942, to be converted from F4U-1 existing airframes and also decided mid 1943 to evaluate the Pratt & Whitnev XR-2800-16 "C"-series engine with a 2stage Birmann turbosupercharger of 1009A type. With the Vought project VS-331,Vought created the F4U-3 being a high speed, high altitude version of the Corsair fitted with a 2stage turbo supercharger from Rudolph Birmann of TEC from Trenton. On 14th June, BuAer asked Vought a proposal for making a high altitude version of the Corsair.
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