TheVought OS2U Kingfisher is an Americancatapult-launched observationfloatplane. It was a compact mid-wingmonoplane, with a large central float and small stabilizing floats. Performance was modest because of its low-poweredengine. The OS2U could also operate on fixed, wheeled,taildragger landing gear.
In the late 1930s,Vought engineerRex Beisel was tasked with designing an observation monoplane aircraft for the U.S. Navy suitable for many tasks, including directing battleship fire. In replacing the standard biplane observation aircraft with a more modern monoplane design, Beisel incorporated innovations making it the first production type to be assembled withspot welding, a process Vought and theNaval Aircraft Factory jointly developed to create a smoothfuselage that resisted buckling and generated less drag. Beisel also introduced high-lift devices andspoilers. In a unique arrangement, deflector plateflaps anddrooping ailerons were located on the trailing edge of the wing to increase thecamber of the wing and thus create additional lift.[1] Beisel's first prototype flew in 1938, powered by an air-cooled, 450 hp (340 kW)Pratt & Whitney R-985-4 Wasp Junior radial engine.[1]
For combat missions, the pilot had a 0.30 in (7.62 mm)Browning M1919 machine gun, the receiver mounted low in the right front cockpit, firing between the engine cylinder heads, while the radio operator/gunner manned another 0.30 in (7.62 mm) machine gun (or a pair) on a flexibleScarff ring mount. The aircraft could also carry two 100 lb (45 kg) bombs or two 325 lb (147 kg)depth charges.[1][2] Additionally, the "Kingfisher", as it was designated, served as a trainer in both its floatplane and landplane configurations.[3]
Aviation cadet in OS2U Kingfisher at the Naval Air Base, Corpus Christi, TexasDowned American airmen near Truk await rescue fromUSSTang on the wings of an OS2U Kingfisher, 1 May 1944
Iowa launches(left) whileMissouri recovers(right) Vought OS2U Kingfishers in 1944.
The first 54 Kingfishers were delivered to the U.S. Navy beginning in August 1940, and 6 had been assigned to thePearl Harbor–based Battle Force before the end of the same year. Many of the following 158 OS2U-2s were attached to flight training atNaval Air Station Pensacola, Florida, but 53 were assigned to equip the newly established Inshore Patrol Squadrons, based atNaval Air Station Jacksonville, Florida. In 1942, nine more Inshore Patrol Squadrons were established, all exclusively equipped with OS2N-1s built by theNaval Aircraft Factory.[4]
The Kingfisher was widely used as a shipboard, catapult-launched scout plane on U.S. Navybattleships,heavy cruisers, andlight cruisers duringWorld War II and played a major role in support of shorebombardments and air-sea rescue. Two examples showing the plane's rescue capabilities include the recovery ofWorld War I aceEddie Rickenbacker and his crew from the Pacific in November 1942[5] and Lieutenant John A. Burns' unique use of the aircraft on 30 April 1944 to taxi airmen rescued fromTruk Lagoon to the submarineTang, which was serving rescue duty near the atoll. In all, Burns rescued ten survivors on two trips[6] and was awarded theNavy Cross for his efforts.
TheUnited States Coast Guard received 76 OS2U-3 Kingfishers starting in 1942 and employed them in anti-submarine warfare, reconnaissance, and search and rescue roles. No Coast Guard Kingfisher is credited with sinking any enemy submarines; however, they were successful in rescuing sailors from ships sunk by enemy torpedoes. The Coast Guard operated Kingfishers until October 1944.[2]
Australia received 18 Kingfishers from a batch of aircraft ordered by theDutch East Indies that was diverted to Australia in 1942. They were initially used as training aircraft for pilots destined forflying boats, but in 1943 they were used to equipNo. 107 Squadron RAAF, which carried out convoy escort duties until disbanded in October 1945.[7] One Kingfisher was used in support of the Australian National Antarctic Research Expedition in 1947–48.[8]
Throughout its U.S. Navy service, the OS2U and even its predecessor, theCurtiss SOC Seagull, served much longer than planned, as the planned successor, theCurtiss SO3C Seamew, suffered from an insufficiently powerful engine which was a complete failure.[9] The OS2U was only slowly replaced in the latter stages of World War II with the introduction of theCurtiss SC Seahawk, the first examples reaching the U.S. Navy in October 1944.[10]
Prototype Vought Model VS.310 powered by a 450 hp (336 kW)Pratt & Whitney R-985-4 engine, one built.
OS2U-1
Initial production variant as the prototype but powered by a 450 hp (336 kW) Pratt & Whitney R-985-48, 54 built.
OS2U-2
Production variant with minor equipment changes and powered by a 450 hp (336 kW) Pratt & Whitney R-985-50, 158 built.
OS2U-3
Based on the OS2U-2 with self-sealing fuel tanks, armour protection, two 0.30 in (7.62 mm) guns (dorsal and nose mounted), and able to carry 325 lb (147 kg) of depth charges or 100 lb (45 kg) bombs, powered by a 450 hp (336 kW) Pratt & Whitney R-985-AN2 engine, 1006 built.
OS2U-4
Two aircraft converted with narrow-chord and high-aspect ratio wings, also fitted with full-span flaps. Not developed.
OS2N-1
Naval Aircraft Factory built OS2U-3 with a 450 hp (336 kW) Pratt & Whitney R-985-AN-2 or -AN-8 engine, 300 built.
5985 – Whale World, Albany, Western Australia. It is waiting to be restored. Originally built for the Netherlands Navy in the Dutch East Indies, it was transferred to the RAAF in 1942, serving with Seaplane Training Flight (later 3 OTU) and 107 Sqn before being sold as war surplus in 1945.[13] Now with Pioneer Aero Ardmore New Zealand for restoration, see below.
5985 – Pioneer Aero, Auckland, New Zealand. Currently undergoing restoration. Originally built for Netherlands Navy in Dutch East Indies, it was transferred to the RAAF in 1942, serving with Seaplane Training Flight (later 3 OTU) and 107 Sqn before being sold as war surplus in 1945.[16]
5982- Pioneer Aero, Auckland, New Zealand. Currently in Storage for future restoration.
1368 (marked #60, painted as 0951) – Obtained from Mexico, the aircraft was previously displayed aboard the battleshipAlabama and is now displayed inside the aircraft pavilion adjacent to the battleship inMobile, Alabama. The building and the aircraft sustained some damage fromHurricane Katrina in 2005.[17]
5926 –National Naval Aviation Museum at NAS Pensacola, Florida. It was one of six OS2U-3 Kingfishers that were transferred by Lend-Lease to theNational Navy of Uruguay during World War II. This aircraft operated as a seaplane until 1958 and was obtained in 1971.[19]
Lynn Garrison salvaged Vought Kingfisher from Calvert Island, British Columbia, February, 1965
3073 (marked #8 based on assigned air group) – On board the battleshipNorth Carolina inWilmington, North Carolina. With the assistance of a Royal Canadian Air ForcePiasecki helicopter,Lynn Garrison salvaged this Kingfisher fromCalvert Island (British Columbia), during the winter of 1963. It crashed there on a ferry flight to Alaska during World War II. It was initially restored for display by volunteers at Vought Aeronautics inGrand Prairie, Texas[20] and sent to the battleship in 1971. The 2018 restoration of the Kingfisher was managed by a Wilmington resident and the Carolina Chapter of the Flight Deck Veterans Group.[citation needed]
^abcNoles Jr., James (February–March 2005)."Old, slow and ugly"(PDF).Air and Space. p. 66. Archived fromthe original(PDF) on 7 September 2008.
^abcd"Vought OS2U-2 / 3 "Kingfisher"".Coast Guard Aviation Association. United States Coast Guard Aviation History.Archived from the original on 14 August 2024. Retrieved7 January 2023.
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