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    XF4U-3B Vought Corsair (*)                

    On 14th June, BuAer asked Vought a proposal for making a high altitude version of the Corsair.

    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.

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    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. The change to this powerplant necessitated the use of a four-blade Hamilton Standard propeller with blades of 6501A-0 type.

     

    When developmental problems persisted with the Pratt & Whitney XR- 2800-16 C engine, the F4U-1A, BuNo. 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.

    The plane was flown for the first time on 20th September 1944.

    The airplane could maintain the WAP ( War Emergency Power) of 2600 hp from sea level  up to 38200 ft ( 8595 m).

     

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    (*) : Index - References - Notes - Citations

         : Books - Bibliography

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