The OS2U Kingfisher was a product of the Vought aircraft firm, appearing initially as the VS.310 design to which the United States Navy accepted as a prototype in the XOS2U-1. The prototype would be airborne for trials by 1938 and fitted with the Pratt & Whitney R-985-4 Wasp Junior radial piston engine of 450 horsepower. After passing trials with the US Navy, the system was given the green light for full production and operational status as the OS2U "Kingfisher" series, serving as catapult launched floatplanes capable of adapting to landing on airstrips as well with some modification to the landing system.
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Vought - USA Manufacturer(s)
Australia; Chile; Cuba; Dominican Republic; Mexico; Netherlands; Soviet Union; United Kingdom; United States; Uruguay Operators
1 x 7.62mm machine gun in forward fixed firing position
1 x 7.62mm machine gun in rear cockpit position
Maximum bomb load of up to 650lbs (including depth charges).
XOS2U-1 - Prototype Model Designation; fitted with Pratt & Whitney R-985-4 Wasp Junior radial piston engine at 450hp.
OS2U-1 - Initial Production Model Designation; fitted with R-985-48 engine; 54 examples produced.
OS2U-2 - Fitted with R-985-50 engine; 158 examples produced.
OS2U-3 - Production Variant appearing in quantity; fitted with R-985-An02 engine; increased fuel capacity and operational range; improved armor protection for crew cabin; 1,006 examples produced; self-sealing fuel tanks; provision for 2 x depth charges.
OS2U-4 - Proposed Improved Model with revised tailplane, wings, flaps and more powerful engine; never produced.
OS2N-1 - Based on the OS2U but production undertaken with the Naval Aircraft Factory.
Kingfisher Mk I - British Fleet Air Arm Designation for the OS2U-3 model series selected by 1941; seen in trainer and catapult launched scout forms.
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