PB4Y

PB4Y-2/P4Y-2 Privateer
U.S. Navy PB4Y-2 from VP-23 in flight.
Role	Maritime patrol bomber
Manufacturer	Consolidated Aircraft
Introduction	1943
Retired	1954, U.S. Navy 1958, U.S. Coast Guard
Primary users	United States Navy United States Coast Guard
Produced	1943–1945
Number built	739
Developed from	Consolidated B-24 Liberator

The Consolidated PB4Y-2 Privateer is a World War II and Korean War era patrol bomber of the United States Navy derived from the Consolidated B-24 Liberator. The Navy had been using unmodified B-24s as the PB4Y-1 Liberator, and the type was considered very successful. A fully navalized design was desired, and Consolidated developed a dedicated long-range patrol bomber in 1943, designated PB4Y-2 Privateer. In 1951, the series was redesignated P4Y-2 Privateer. A further designation change occurred in September 1962, when the remaining Navy Privateers (all having previously been converted to drone configuration as P4Y-2K) were redesignated QP-4B.

The Privateer was externally similar to the Liberator, but the fuselage was longer to accommodate a flight engineer's station, and had a tall single vertical stabilizer rather than the B-24's twin tail configuration. The defensive armament was also increased to 12 .50-in (12.7 mm) M2 Browning machine guns in six turrets (two dorsal, two waist, nose and tail), with the B-24's ventral, retractable Sperry ball turret being omitted. Turbosuperchargers were not fitted to the engines since maritime patrol missions were not usually flown at high altitude.

The Ford Motor Company (which produced B-24s for the United States Army Air Forces) had earlier built an experimental variant (B-24K) using a single tail. Aircraft handling was improved. The single tail installation was used on the B-32 Dominator and PB4Y-2 and was slated for the Air Corps' proposed B-24N production model was to be built by Ford, but the order was canceled on 31 May 1945 and the B-24N never entered production.

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