Vought OS2U Kingfisher
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The Vought OS2U Kingfisher is an American catapult-launched observation
floatplane A floatplane is a type of seaplane with one or more slender floats mounted under the fuselage to provide buoyancy. By contrast, a flying boat uses its fuselage for buoyancy. Either type of seaplane may also have landing gear suitable for land, ...
. It was a compact mid-wing
monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing con ...
, with a large central float and small stabilizing floats. Performance was modest because of its low-powered
engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ge ...
. The OS2U could also operate on fixed, wheeled, taildragger landing gear. The OS2U was the main shipboard
observation seaplane Observation seaplanes are military aircraft with flotation devices allowing them to land on and take off from water. Their primary purpose was to observe and report enemy movements or to spot the fall of shot from naval artillery, but some were a ...
used by the
United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, and 1,519 of the aircraft were built. It served on
battleship A battleship is a large, heavily naval armour, armored warship with a main battery consisting of large naval gun, guns, designed to serve as a capital ship. From their advent in the late 1880s, battleships were among the largest and most form ...
s and
cruiser A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several operational roles from search-and-destroy to ocean escort to sea ...
s of the U.S. Navy, with the
United States Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines or simply the Marines, is the maritime land force service branch of the United States Department of Defense. It is responsible for conducting expeditionar ...
in Marine Scouting Squadron Three (VMS-3), with the
United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is one of the country's eight Uniformed services ...
at coastal air stations; at sea with the
Fleet Air Arm The Fleet Air Arm (FAA) is the naval aviation component of the United Kingdom's Royal Navy (RN). The FAA is one of five :Fighting Arms of the Royal Navy, RN fighting arms. it is a primarily helicopter force, though also operating the Lockhee ...
of the
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
; with the
Soviet Navy The Soviet Navy was the naval warfare Military, uniform service branch of the Soviet Armed Forces. Often referred to as the Red Fleet, the Soviet Navy made up a large part of the Soviet Union's strategic planning in the event of a conflict with t ...
; and with the
Royal Australian Air Force The Royal Australian Air Force (RAAF) is the principal Air force, aerial warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Australian Army. Constitutionally the Governor-Gener ...
. The
Naval Aircraft Factory The Naval Aircraft Factory (NAF) was established by the United States Navy in 1918 in Philadelphia, Pennsylvania. It was created to help solve aircraft supply issues which the United States Department of the Navy, Navy Department faced upon the ...
OS2N was the designation of the OS2U-3 aircraft built by the Naval Aircraft Factory in
Philadelphia, Pennsylvania Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...
. The OS2U first flew on 1 March 1938.


Design and development

In the late 1930s,
Vought Vought was the name of several related American aerospace firms. These have included, in the past, Lewis and Vought Corporation, Chance Vought, Vought-Sikorsky, LTV Aerospace (part of Ling-Temco-Vought), Vought Aircraft Companies, and Vought ...
engineer
Rex Beisel Rex Buren Beisel (October 24, 1893 – January 26, 1972) was an American aeronautical engineer and pioneer in the science and industry of aviation. He was the lead designer of several successful military and civilian aircraft, but is best known fo ...
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 with
spot welding Spot welding (or resistance spot welding) is a type of electric resistance welding used to weld various sheet metal products, through a process in which contacting metal surface points are joined by the heat obtained from resistance to electric ...
, a process Vought and the
Naval Aircraft Factory The Naval Aircraft Factory (NAF) was established by the United States Navy in 1918 in Philadelphia, Pennsylvania. It was created to help solve aircraft supply issues which the United States Department of the Navy, Navy Department faced upon the ...
jointly developed to create a smooth
fuselage The fuselage (; from the French language, French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds Aircrew, crew, passengers, or cargo. In single-engine aircraft, it will usually contain an Aircraft engine, engine as wel ...
that resisted buckling and generated less drag. Beisel also introduced high-lift devices and spoilers. In a unique arrangement, deflector plate flaps and drooping ailerons were located on the trailing edge of the wing to increase the camber of the wing and thus create additional lift. Beisel's first prototype flew in 1938, powered by an air-cooled, Pratt & Whitney R-985-4 Wasp Junior radial engine. For combat missions, the pilot had a 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 machine gun (or a pair) on a flexible
Scarff ring The Scarff ring was a type of machine gun mounting developed during the First World War by Warrant Officer (Gunner) F. W. Scarff of the Admiralty Air Department for use on two-seater aircraft. The mount incorporated bungee cord suspension in el ...
mount. The aircraft could also carry two bombs or two
depth charge A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited ...
s. Additionally, the "
Kingfisher Kingfishers are a family, the Alcedinidae, of small to medium-sized, brightly coloured birds in the order Coraciiformes. They have a cosmopolitan distribution, with most species living in the tropical regions of Africa, Asia, and Oceania, ...
", as it was designated, served as a trainer in both its floatplane and landplane configurations.


Operational history

The first 54 Kingfishers were delivered to the U.S. Navy beginning in August 1940, and 6 had been assigned to the
Pearl Harbor Pearl Harbor is an American lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. It was often visited by the naval fleet of the United States, before it was acquired from the Hawaiian Kingdom by the U.S. with the signing of the Reci ...
–based Battle Force before the end of the same year. Many of the following 158 OS2U-2s were attached to flight training at
Naval Air Station Pensacola Naval Air Station Pensacola or NAS Pensacola (formerly NAS/KNAS until changed circa 1970 to allow Nassau International Airport, now Lynden Pindling International Airport, to have IATA code NAS), "The Cradle of Naval Aviation", is a United Sta ...
, Florida, but 53 were assigned to equip the newly established Inshore Patrol Squadrons, based at Naval Air Station Jacksonville, Florida. In 1942, nine more Inshore Patrol Squadrons were established, all exclusively equipped with OS2N-1s built by the
Naval Aircraft Factory The Naval Aircraft Factory (NAF) was established by the United States Navy in 1918 in Philadelphia, Pennsylvania. It was created to help solve aircraft supply issues which the United States Department of the Navy, Navy Department faced upon the ...
. The Kingfisher was widely used as a shipboard, catapult-launched scout plane on U.S. Navy
battleships A battleship is a large, heavily naval armour, armored warship with a main battery consisting of large naval gun, guns, designed to serve as a capital ship. From their advent in the late 1880s, battleships were among the largest and most form ...
,
heavy cruiser A heavy cruiser was a type of cruiser, a naval warship designed for long range and high speed, armed generally with naval guns of roughly 203 mm (8 inches) in calibre, whose design parameters were dictated by the Washington Naval Treat ...
s, and
light cruiser A light cruiser is a type of small or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck. Prior to thi ...
s during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
and played a major role in support of shore
bombardment A bombardment is an attack by artillery fire or by dropping bombs from aircraft on fortifications, combatants, or cities and buildings. Prior to World War I, the term was only applied to the bombardment of defenseless or undefended obje ...
s and air-sea rescue. Two examples showing the plane's rescue capabilities include the recovery of
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
ace
Eddie Rickenbacker Edward Vernon Rickenbacker (born Edward Rickenbacher, October 8, 1890 – July 23, 1973) was an American fighter pilot in World War I and a Medal of Honor recipient.Truk Lagoon to the submarine , which was serving rescue duty near the atoll. In all, Burns rescued ten survivors on two trips and was awarded the
Navy Cross The Navy Cross is the United States Naval Service's second-highest military decoration awarded for sailors and marines who distinguish themselves for extraordinary heroism in combat with an armed enemy force. The medal is equivalent to the Army ...
for his efforts. The
United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is one of the country's eight Uniformed services ...
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. Australia received 18 Kingfishers from a batch of aircraft ordered by the
Dutch East Indies The Dutch East Indies, also known as the Netherlands East Indies (; ), was a Dutch Empire, Dutch colony with territory mostly comprising the modern state of Indonesia, which Proclamation of Indonesian Independence, declared independence on 17 Au ...
that was diverted to Australia in 1942. They were initially used as training aircraft for pilots destined for
flying boat A flying boat is a type of seaplane with a hull, allowing it to land on water. It differs from a floatplane in having a fuselage that is purpose-designed for flotation, while floatplanes rely on fuselage-mounted floats for buoyancy. Though ...
s, but in 1943 they were used to equip No. 107 Squadron RAAF, which carried out convoy escort duties until disbanded in October 1945.Vincent 1998, pp. 54–59. One Kingfisher was used in support of the Australian National Antarctic Research Expedition in 1947–48.Vincent 1998, pp. 61–62. Throughout its U.S. Navy service, the OS2U and even its predecessor, the
Curtiss SOC Seagull The Curtiss SOC Seagull was an American single-engined scout observation seaplane, designed by Alexander Solla of the Curtiss-Wright Corporation for the United States Navy. The aircraft served on battleships and cruisers in a seaplane configurat ...
, served much longer than planned, as the planned successor, the Curtiss SO3C Seamew, suffered from an insufficiently powerful engine which was a complete failure. The OS2U was only slowly replaced in the latter stages of World War II with the introduction of the Curtiss SC Seahawk, the first examples reaching the U.S. Navy in October 1944.


Variants

;XOS2U-1 :Prototype Vought Model VS.310 powered by a
Pratt & Whitney R-985 The Pratt & Whitney R-985 Wasp Junior is a series of nine-cylinder, air-cooled, radial engine, radial aircraft engines built by the Pratt & Whitney Aircraft Company from the 1930s to the 1950s. These engines have a Engine displacement, displace ...
-4 engine, one built. ;OS2U-1 :Initial production variant as the prototype but powered by a Pratt & Whitney R-985-48, 54 built. ;OS2U-2 :Production variant with minor equipment changes and powered by a Pratt & Whitney R-985-50, 158 built. ;OS2U-3 :Based on the OS2U-2 with self-sealing fuel tanks, armour protection, two guns (dorsal and nose mounted), and able to carry of depth charges or bombs, powered by a 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 Pratt & Whitney R-985-AN-2 or -AN-8 engine, 300 built. ;Kingfisher I :
British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies. * British national identity, the characteristics of British people and culture ...
designation for the OS2U-3, 100 delivered to the
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
.


Operators

; *
Royal Australian Air Force The Royal Australian Air Force (RAAF) is the principal Air force, aerial warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Australian Army. Constitutionally the Governor-Gener ...
** No. 107 Squadron RAAF ; : 15 aircraft, operated 1942–1957. ; * Cuban Naval Aviation : Operated four aircraft between 1942 and 1959. ; :(Three aircraft) ; *
Mexican Navy The Mexican Navy () is one of the components of the Mexican Armed Forces. The Secretariat of the Navy is in charge of administration of the navy. The commander of the navy is the Secretary of the Navy, who is both a cabinet minister and a career ...
: Six aircraft, 201 Squadron. ; : 24 aircraft, not delivered in time for hostilities. ; *
Soviet Naval Aviation Soviet Naval Aviation (AV-MF, ) was the naval aviation arm of the Soviet Navy. Origins The first naval aviation units in Russia were formed in 1912–1914 as a part of the Baltic Fleet and the Black Sea Fleet. During World War I, the hydro ...
: 2 aircraft on the ship USS ''Milwaukee'' (Murmansk) ; *
Fleet Air Arm The Fleet Air Arm (FAA) is the naval aviation component of the United Kingdom's Royal Navy (RN). The FAA is one of five :Fighting Arms of the Royal Navy, RN fighting arms. it is a primarily helicopter force, though also operating the Lockhee ...
: Received 100 aircraft. ; *
United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
*
United States Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines or simply the Marines, is the maritime land force service branch of the United States Department of Defense. It is responsible for conducting expeditionar ...
*
United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is one of the country's eight Uniformed services ...
—76 aircraft. ; * Uruguayan Navy : Received six OS2U-3s in 1942 to 1959 under
Lend Lease Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (),
.


Aircraft on display

At least eight Kingfishers survive in collections of historic aircraft around the world.


Australia

; OS2U-3 *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. Now with Pioneer Aero Ardmore New Zealand for restoration, see below.


Chile

;OS2U-3 *5925 – Museo Nacional Aeronáutico y del Espacio,
Santiago Santiago (, ; ), also known as Santiago de Chile (), is the capital and largest city of Chile and one of the largest cities in the Americas. It is located in the country's central valley and is the center of the Santiago Metropolitan Regi ...
.


Cuba

;OS2U-3 *09650 (marked #50) – Museum of the Revolution (Museo de la Revolución),
Havana, Cuba Havana (; ) is the capital and largest city of Cuba. The heart of La Habana Province, Havana is the country's main port and commercial center. ; On display ; OS2U-3 *1368 (marked #60, painted as 0951) – Obtained from Mexico, the aircraft was previously displayed aboard the battleship and is now displayed inside the aircraft pavilion adjacent to the battleship in
Mobile, Alabama Mobile ( , ) is a city and the county seat of Mobile County, Alabama, United States. The population was 187,041 at the 2020 United States census, 2020 census. After a successful vote to annex areas west of the city limits in July 2023, Mobil ...
. The building and the aircraft sustained some damage from
Hurricane Katrina Hurricane Katrina was a powerful, devastating and historic tropical cyclone that caused 1,392 fatalities and damages estimated at $125 billion in late August 2005, particularly in the city of New Orleans and its surrounding area. ...
in 2005. *5909 – Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center,
National Air and Space Museum The National Air and Space Museum (NASM) of the Smithsonian Institution is a museum in Washington, D.C., in the United States, dedicated to history of aviation, human flight and space exploration. Established in 1946 as the National Air Museum, ...
at
Dulles International Airport Washington Dulles International Airport ( ) – commonly known by its former name of Dulles International Airport, by its airport code of IAD, or simply as Dulles Airport – is an international airport in the Eastern United States, located w ...
outside of Washington, DC. *5926 – National Naval Aviation Museum at NAS Pensacola, Florida. It was one of six OS2U-3 Kingfishers that were transferred by Lend-Lease to the National Navy of Uruguay during World War II. This aircraft operated as a seaplane until 1958 and was obtained in 1971. *3073 (marked #8 based on assigned air group) – On board the battleship in
Wilmington, North Carolina Wilmington is a port city in New Hanover County, North Carolina, United States. With a population of 115,451 as of the 2020 United States census, 2020 census, it is the List of municipalities in North Carolina, eighth-most populous city in the st ...
. With the assistance of a Royal Canadian Air Force Piasecki helicopter,
Lynn Garrison Lynn Garrison (born April 1, 1937) is a Canadian pilot and political adviser. He was a Royal Canadian Air Force fighter pilot in the 403 Helicopter Operational Training Squadron, 403 City of Calgary Squadron, before holding jobs as a Commercial ...
salvaged this Kingfisher from Calvert 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 in
Grand Prairie, Texas Grand Prairie is a city in the U.S. state of Texas, located in Dallas County, Texas, Dallas, Tarrant County, Texas, Tarrant, and Ellis County, Texas, Ellis counties with a small part extending into Johnson County, Texas , Johnson county. It ...
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. ; In storage ; OS2U-3 *09643 – In storage at the
Yanks Air Museum The Yanks Air Museum is an aviation museum dedicated to exhibiting, preserving and restoring American aircraft and artifacts in order to show the evolution of American aviation, located at Chino Airport in Chino, California. History A pair of F ...
,
Chino, California Chino ( ; Spanish for "Curly") is a city in the western end of San Bernardino County, California, United States, with Los Angeles County to its west and Orange County to its south in the Southern California region. Chino's surroundings ha ...
.


Specifications (OS2U-3)


See also


Notes


References

* * * * * * * * * *


External links


Wainwright, Marshall. "Kingfisher goes to war" Air Classics, June 2004.

"Slingshot Planes" Popular Science, May 1943
als
page 62
of the same article

{{Authority control OS02U Floatplanes 1930s United States military reconnaissance aircraft Single-engined tractor aircraft Carrier-based aircraft Low-wing aircraft Aircraft first flown in 1938 Aircraft with fixed conventional landing gear Single-engined piston aircraft