The AD Navyplane was designed by the

British Admiralty The Admiralty was a department of the Government of the United Kingdom responsible for the command of the Royal Navy until 1964, historically under its titular head, the Lord High Admiral – one of the Great Officers of State. For much of it ...

Air Department The Air Department of the British Admiralty later succeeded briefly by the Air Section followed by the Air Division was established prior to World War I by Winston Churchill to administer the Royal Naval Air Service. History In 1908, the Briti ...

as a

reconnaissance aircraft A reconnaissance aircraft (colloquially, a spy plane) is a military aircraft designed or adapted to perform aerial reconnaissance with roles including collection of imagery intelligence (including using photography), signals intelligence, as ...

for use during

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

. Performance of the

prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototyp ...

was so disappointing that plans to produce it were cancelled almost immediately. The Navyplane was designed by the Admiralty's

Harold Bolas Harold may refer to: People * Harold (given name), including a list of persons and fictional characters with the name * Harold (surname), surname in the English language * András Arató, known in meme culture as "Hide the Pain Harold" Arts a ...

with the assistance of

R.J. Mitchell Reginald Joseph Mitchell (20 May 189511 June 1937) was a British aeronautical engineering, aircraft designer who worked for the Southampton aviation company Supermarine from 1916 until 1936. He is best remembered for designing racing seaplan ...

Supermarine Supermarine was a British aircraft manufacturer that is most famous for producing the Supermarine Spitfire, Spitfire fighter plane during World War II as well as a range of seaplanes and flying boats, and a series of Jet engine, jet-powered figh ...

. It was a pusher

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, ...

biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...

with the pilot and observer being seated ahead of the wings in a streamlined lightweight

nacelle A nacelle ( ) is a "streamlined body, sized according to what it contains", such as an engine, fuel, or equipment on an aircraft. When attached by a pylon entirely outside the airframe, it is sometimes called a pod, in which case it is attached ...

mounted in the gap between the upper and lower sets of wings. A Smith Static

radial engine The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ca ...

and a

pusher propeller In an aircraft with a pusher configuration (as opposed to a tractor configuration), the propeller(s) are mounted behind their respective engine(s). Since a pusher propeller is mounted behind the engine, the drive shaft is in compression in nor ...

were installed behind them.Andrews and Morgan 1987, p.25. Two examples were ordered in 1916 for the

Royal Naval Air Service The Royal Naval Air Service (RNAS) was the air arm of the Royal Navy, under the direction of the Admiralty's Air Department, and existed formally from 1 July 1914 to 1 April 1918, when it was merged with the British Army's Royal Flying Corps t ...

(RNAS).Andrews and Morgan 1987, p.26. Serial numbers were allocated for seven Navyplanes (9095-'96, N.1070-'74) but just one prototype (9095) was completed.Bruce 1957, p.9. Tests of this Supermarine-built prototype commenced in August

1916 Events Below, the events of the First World War have the "WWI" prefix. January * January 1 – The British Royal Army Medical Corps carries out the first successful blood transfusion, using blood that had been stored and cooled. * ...

(flown by Lieutenant-Commander

John Seddon John Seddon is a British occupational psychologist and author, specialising in change in the service industry. He is the managing director of Vanguard, a consultancy company he formed in 1985 and the inventor of ' The Vanguard Method'. Vangua ...

) but proved seriously underpowered and unsatisfactory. The engine was replaced with an AR.1

rotary engine The rotary engine is an early type of internal combustion engine, usually designed with an odd number of cylinders per row in a radial configuration. The engine's crankshaft remained stationary in operation, while the entire crankcase and i ...

(which was later redesignated the BR.1 for Bentley Rotary 1) and retested in May 1917. However, even without a military load and observer, the Navyplane's performance still proved to be poor,Mason 1994, p.65. and the design was abandoned on 27 August 1917, with no second prototype being produced. Supermarine attempted to design an improved version to replace the

Short 184 The Short Admiralty Type 184, often called the Short 225 after the power rating of the engine first fitted, was a British two-seat reconnaissance, bombing and torpedo carrying folding-wing seaplane designed by Horace Short of Short Brothers. It ...

, the design, the Supermarine Patrol Seaplane, being powered by a 200 hp (149 kW) Sunbeam engine. While contracts for six aircraft were placed, work was abandoned before a prototype was built, the Short 184 proving adequate in the patrol role.

Specifications (AD Navyplane)

References

;Notes ;Bibliography *Andrews, C. F., and Morgan, E. B. ''Supermarine Aircraft since 1914''. London:Putnam, 1987, . *Bruce, J.M . ''British Aeroplanes 1914-18''. London:Putnam, 1957. *Mason, Francis K. ''The British Bomber since 1914''. London:Putnam, 1994. . {{DEFAULTSORT:Ad Navyplane Navyplane 1910s British military reconnaissance aircraft Single-engined pusher aircraft Flying boats Supermarine aircraft Biplanes Aircraft first flown in 1916 Rotary-engined aircraft

Specifications (AD Navyplane)

See also

References