The XB-24P-CO was a B-24D (serial number 42-40344) modified by Sperry
Gyroscope Co. in July of 1945 for airborne fire control system
research. Only one such modification was carried out.
Sources:
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Famous Bombers of the Second World War, William Green,
Doubleday, 1959.
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Liberator: America's Global Bomber, Alwyn T. Lloyd,
Pictorial Histories Publishing Co, Inc, 1993.
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General Dynamics Aircraft and Their Predecesssors, John Wegg,
Naval Institute Press, 1990.