Westland Wapiti
Encyclopedia
The Westland Wapiti was a British
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 two-seat general purpose military single-engined biplane of the 1920s. It was designed and built by Westland Aircraft Works
Westland Aircraft
Westland Aircraft was a British aircraft manufacturer located in Yeovil in Somerset. Formed as a separate company by separation from Petters Ltd just before the start of the Second World War, Westland had been building aircraft since 1915...

 to replace the Airco DH.9A
Airco DH.9A
The Airco DH.9A was a British light bomber designed and first used shortly before the end of the First World War. Colloquially known as the "Ninak" , it served on in large numbers for the Royal Air Force following the end of the war, both at home and overseas, where it was used for colonial...

 in Royal Air Force
Royal Air Force
The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

 service.

First flying in 1927, the Wapiti entered service with the RAF in 1928, and remained in production until 1932, a total of 565 being built. It equipped twenty squadrons of the RAF, both overseas (particularly in India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 and Iraq
Iraq
Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

) and at home, remaining in RAF service until 1940, also being used by the Air Forces of Australia, Canada, South Africa and India.
It also formed the basis for the Westland Wallace
Westland Wallace
The Westland Wallace was a British two-seat, general-purpose biplane of the Royal Air Force, developed by Westland as a follow-on to their successful Wapiti. As the last of the inter-war general purpose biplanes, it was used by a number of frontline and Auxiliary Air Force Squadrons...

 which partly replaced the Wapiti in RAF use.

Design and development

In 1927, the British Air Ministry
Air Ministry
The Air Ministry was a department of the British Government with the responsibility of managing the affairs of the Royal Air Force, that existed from 1918 to 1964...

 issued Specification 26/27 for a replacement of the elderly Airco DH.9A
Airco DH.9A
The Airco DH.9A was a British light bomber designed and first used shortly before the end of the First World War. Colloquially known as the "Ninak" , it served on in large numbers for the Royal Air Force following the end of the war, both at home and overseas, where it was used for colonial...

, designed during the First World War
World War I
World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 which still equipped the Royal Air Force
Royal Air Force
The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

's General Purpose squadrons. To save time and money, the specification called for the use of a high proportion of DH.9A components, (as the RAF still held large stores of DH.9A spares), while it encouraged the use of an all-metal structure. A large number of types were tendered to meet this requirement from most of the major British aircraft manufacturers, including Westland, who submitted the design that later became known as the Wapiti. Westland had an advantage in that it had carried out the detailed design work for the DH.9A, and was already a major contractor for the DH.9A.

The Wapiti was a conventional single-engined equal span two-bay biplane with slight stagger. It had tandem open cockpits and a fixed main undercarriage plus tail-skid. The forward fuselage was of metal tube structure with aluminium and fabric covering, while the rear fuselage was of fabric covered wooden construction. The wings and tail were standard wooden DH.9A components, although later models replaced the wooden parts with an all-metal structure. The Wapiti was powered by a single Bristol Jupiter
Bristol Jupiter
The Bristol Jupiter was a British nine-cylinder single-row piston radial engine built by the Bristol Aeroplane Company. Originally designed late in World War I and known as the Cosmos Jupiter, a lengthy series of upgrades and developments turned it into one of the finest engines of its era.The...

 radial engine
Radial engine
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel...

, and its crew of two were armed with a forward firing Vickers machine gun
Vickers machine gun
Not to be confused with the Vickers light machine gunThe Vickers machine gun or Vickers gun is a name primarily used to refer to the water-cooled .303 inch machine gun produced by Vickers Limited, originally for the British Army...

 and a Lewis gun
Lewis Gun
The Lewis Gun is a World War I–era light machine gun of American design that was perfected and widely used by the British Empire. It was first used in combat in World War I, and continued in service with a number of armed forces through to the end of the Korean War...

 for the observer, while it could carry up to 580 lb (264 kg) of bombs under the wings and fuselage. It was also fitted with radio and photographic cameras, and like the DH.9A before it, could carry a spare wheel for operations in adverse terrain.

The prototype first flew on 7 March 1927. Initial tests showed poor control, and the prototype was modified with a much larger tail and horn-balanced aileron
Aileron
Ailerons are hinged flight control surfaces attached to the trailing edge of the wing of a fixed-wing aircraft. The ailerons are used to control the aircraft in roll, which results in a change in heading due to the tilting of the lift vector...

s, solving these problems. (It was later discovered that a 2 foot (0.61 m) fuselage section had been omitted from the prototype - as handling was now acceptable, it was not re-instated.) The Wapiti performed well during RAF trials, while using significant amounts of DH.9A components, and was declared the winner of the competition, an initial contract for 25 aircraft being placed in October 1927.

After initial production, the wooden fuselage, tail and wings were replaced by metal structures in the Wapiti II and IIA, and the original long fuselage was eventually re-instated in the Wapiti V and later versions. In 1930, Westland produced an updated version of the Wapiti, the Wapiti VII, which differed so much that it was re-named the Westland Wallace
Westland Wallace
The Westland Wallace was a British two-seat, general-purpose biplane of the Royal Air Force, developed by Westland as a follow-on to their successful Wapiti. As the last of the inter-war general purpose biplanes, it was used by a number of frontline and Auxiliary Air Force Squadrons...

.

Operational history

The type entered service with No. 84 Squadron RAF
No. 84 Squadron RAF
No. 84 Squadron of the Royal Air Force is at present a Search and Rescue Squadron based at RAF Akrotiri, it uses the Bell Griffin HAR.2 helicopter. It is currently part of the RAF's Search and Rescue Force-History:...

 in Iraq
Iraq
Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

 in June 1928
1928 in aviation
This is a list of aviation-related events from 1928:- Events :* The Soviet Unions First Five-Year Plan begins, placing a high priority on the construction of new aircraft factories...

. It was heavily used in Iraq and India in the Army Co-operation role, acting also sometimes as a bomber or reconnaissance aircraft. Wapitis of No. 20 squadron escorted Victoria
Vickers Victoria
-See also:...

 troop carriers in the evacuation of Kabul (the Kabul Airlift
Timeline of the Royal Air Force
-1900-1918: The origins of the Royal Air Force:*1901**29 October - The Aero Club of Great Britain is established. In the following years many early military pilots were trained by members of the Club.*1905...

) in December 1928. It was still in service in India until 1939. In Britain, Wapitis served with the Auxiliary Air Force from 1929 to 1937. It was also flown by Australia and Canada, where it saw service at the start of the Second World War.

The prototype Wapiti V, registered G-AAWA, was used for demonstration flights in Argentina and Uruguay on floats, powered by a 550 hp Armstrong Siddeley Panther
Armstrong Siddeley Panther
|-See also:-Bibliography:* Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6....

 IIA engine. It was later modified as the Bristol Pegasus powered Westland PV-6 or Wapiti VII, re-registered G-ACBR (also known as the Houston-Wallace after the patron Lucy, Lady Houston
Lucy, Lady Houston
Lucy, Lady Houston, DBE , born Fanny Lucy Radmall, was an English benefactor, philanthropist, adventuress and patriot.-Early life:...

), for an attempt to fly over Mount Everest
Mount Everest
Mount Everest is the world's highest mountain, with a peak at above sea level. It is located in the Mahalangur section of the Himalayas. The international boundary runs across the precise summit point...

. Flown by Flt Lt David F. McIntyre and accompanied by a Westland PV-3
Westland PV-3
-External links:**...

 the two aircraft became the first to fly over Mount Everest on 3 April 1933. The PV-6 was later designated the Wallace Mk I, bearing serial K3488 which introduced a number of improvements. A total of 68 Wapitis were converted to Wallace Mk I
Westland Wallace
The Westland Wallace was a British two-seat, general-purpose biplane of the Royal Air Force, developed by Westland as a follow-on to their successful Wapiti. As the last of the inter-war general purpose biplanes, it was used by a number of frontline and Auxiliary Air Force Squadrons...

 standard.

Military operators

  • Royal Australian Air Force
    Royal Australian Air Force
    The Royal Australian Air Force is the air force branch of the Australian Defence Force. The RAAF was formed in March 1921. It continues the traditions of the Australian Flying Corps , which was formed on 22 October 1912. The RAAF has taken part in many of the 20th century's major conflicts...

     - 44 Wapitis were in service from 1929 to 1944.
    • No. 1 Squadron RAAF
      No. 1 Squadron RAAF
      No. 1 Squadron is a Royal Australian Air Force squadron based at RAAF Amberley. The squadron is currently being re-equipped with F/A-18F Super Hornet multi-role fighters.-World War I:...

    • No. 3 Squadron RAAF
      No. 3 Squadron RAAF
      No. 3 Squadron is a Royal Australian Air Force fighter squadron. It was first formed in 1916 and currently operates F/A-18 Hornet aircraft from RAAF Base Williamtown, near Newcastle, New South Wales.-World War I:...

    • No. 1 Flying Training School RAAF
      No. 1 Flying Training School RAAF
      No. 1 Flying Training School was a flying training school of the Royal Australian Air Force . It was one of the Air Force's original units, dating back to the service's formation in 1921, when it was based at RAAF Point Cook, Victoria. The school underwent a number of reorganisations during its...

    • Central Flying School RAAF
      Central Flying School RAAF
      The Central Flying School RAAF is a Royal Australian Air Force training establishment, based at RAAF Base East Sale. It was formed in March 1913, and during the First World War it trained over 150 pilots, who fought in Europe and the Middle East....



 Canada
  • Royal Canadian Air Force
    Royal Canadian Air Force
    The history of the Royal Canadian Air Force begins in 1920, when the air force was created as the Canadian Air Force . In 1924 the CAF was renamed the Royal Canadian Air Force and granted royal sanction by King George V. The RCAF existed as an independent service until 1968...

    • No. 3 Squadron RCAF
    • No. 10 Squadron RCAF
      No. 10 Squadron RCAF
      No. 10 Squadron RCAF was a Royal Canadian Air Force squadron that was active during the Second World War. It was primarily used in an anti-submarine role and was based on the east coast of Canada and Newfoundland. It established the RCAF record for attacks on U-boats with 22 and was successful in...

    • No. 100 Squadron RCAF


  • Chinese Nationalist Air Force


 India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

  • Royal Indian Air Force
    • No. 1 Squadron, Indian Air Force
      No. 1 Squadron, Indian Air Force
      No. 1 Squadron is the oldest squadron of the Indian Air Force. It operates as an multirole unit. Based at Gwalior AFB, No. 1 Squadron falls under the Central Air Command, and along with No. 7 Squadron , No...

    • No. 2 Squadron, Indian Air Force
      No. 2 Squadron, Indian Air Force
      No.2 Squadron , Indian Air Force is a unit dedicated to CAS. Based at Kalaikunda AFS, it forms, along with No. 18 Squadron IAF, No. 5 Wing IAF.No. 2 Sqn falls under the Eastern Air Command....

    • No. 7 Squadron, Indian Air Force
      No. 7 Squadron, Indian Air Force
      No. 7 Squadron, Indian Air Force operates as a CAS and air superiority unit. Based at Gwalior AFB, No.7 Squadron along with No. 1 Squadron IAF , and No. 9 Squadron IAF , forms a part of No. 40 Wing IAF, Central Air Command.-Crest:No...

    • No. 1 Air Gunnery School (India)
    • No. 1 AACU
    • No. 2 AACU
    • No. 3 AACU
    • No.1 Coastal Defence Flight, IAFVR
    • No.2 Coastal Defence Flight, IAFVR
    • No.4 Coastal Defence Flight, IAFVR (Later No. 104 (GR) Squadron, Indian Air Force )
    • No.5 Coastal Defence Flight, IAFVR
    • No.6 Coastal Defence Flight, IAFVR


 South Africa
  • South African Air Force
    South African Air Force
    The South African Air Force is the air force of South Africa, with headquarters in Pretoria. It is the world's second oldest independent air force, and its motto is Per Aspera Ad Astra...



  • Royal Air Force
    Royal Air Force
    The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...


(in India)
    • No. 5 Squadron RAF
      No. 5 Squadron RAF
      No. 5 Squadron of the Royal Air Force is the operator of the new Sentinel R1 Airborne STand-Off Radar aircraft and is based at RAF Waddington.-History:As No...

       from 1931 to 1940
    • No. 11 Squadron RAF from 1928 to 1932
    • No. 20 Squadron RAF
      No. 20 Squadron RAF
      No. 20 Squadron of the Royal Air Force was until March 2010, the OCU for the BAE Harrier GR9, and T12, operating from RAF Wittering...

       from 1932 to 1935
    • No. 27 Squadron RAF
      No. 27 Squadron RAF
      No. 27 Squadron of the Royal Air Force operates the Boeing Chinook HC2 from RAF Odiham.-The Great War:27 Squadron formed at Hounslow Heath Aerodrome on 5 November 1915, soon being equipped with Martinsyde Elephant fighter aircraft, hence the use of an elephant for the squadron badge...

       from 1930 to 1940
    • No. 28 Squadron RAF
      No. 28 Squadron RAF
      No. 28 Squadron of the Royal Air Force operates the Merlin HC3/HC3A from RAF Benson.-World War I:No. 28 Squadron of the Royal Flying Corps was formed on 7 November 1915. Initially a training squadron it became a fighter squadron equipped with the Sopwith Camel.After the end of World War I No. 28...

       from 1931 to 1936
    • No. 31 Squadron RAF
      No. 31 Squadron RAF
      No. 31 Squadron of the Royal Air Force, known as the 'Goldstars', currently operates the Tornado GR4 from RAF Marham, Norfolk.-History:The squadron was formed at Farnborough on October 11, 1915. Its first deployment was to Risulpur, India with its BE2Cs and Farmans, and during this time it took...

       from 1931 to 1939
    • No. 60 Squadron RAF
      No. 60 Squadron RAF
      No. 60 Squadron of the Royal Air Force was formed in 1916 at Gosport. It is currently part of the Defence Helicopter Flying School based at RAF Shawbury in Shropshire....

       from 1930 to 1939

(in Iraq)
    • No. 30 Squadron RAF
      No. 30 Squadron RAF
      No. 30 Squadron of the Royal Air Force operates the second generation C-130J Hercules from RAF Brize Norton, Oxfordshire. The squadron operates alongside No. 24 Squadron and No. 47 Squadron all flying the Hercules.-History:...

       from 1929 to 1935
    • No. 39 Squadron RAF
      No. 39 Squadron RAF
      No. 39 Squadron of the Royal Air Force operates the MQ-9 Reaper since 2007, operating from Creech AFB, Nevada, USA.-World War I:39 Squadron was founded at Hounslow Heath Aerodrome in April 1916 with B.E.2s and Royal Aircraft Factory B.E.12s in an attempt to defend against German Zeppelin raids on...

       from 1921 to 1931
    • No. 55 Squadron RAF
      No. 55 Squadron RAF
      No. 55 Squadron is a squadron of the Royal Air Force. It was formed in 1916 at Castle Bromwich as a unit of the Royal Flying Corps. No. 55 Squadron was the last RAF Squadron to operationally fly the Handley Page Victor, in its Victor K.2 in-flight refuelling tanker role. It was subsequently a...

       from 1930 to 1937
    • No. 84 Squadron RAF
      No. 84 Squadron RAF
      No. 84 Squadron of the Royal Air Force is at present a Search and Rescue Squadron based at RAF Akrotiri, it uses the Bell Griffin HAR.2 helicopter. It is currently part of the RAF's Search and Rescue Force-History:...

       from 1928 to 1935

(in the United Kingdom)
    • No. 24 Squadron RAF from 1924 to 1930 at RAF Northolt
      RAF Northolt
      RAF Northolt is a Royal Air Force station situated in South Ruislip, east by northeast of Uxbridge in the London Borough of Hillingdon, West London. Approximately north of London Heathrow Airport, the station also handles a large number of private civil flights...

    • No. 501 Squadron RAF
      No. 501 Squadron RAF
      No 501 Squadron was the fourteenth of the twenty-one flying units in the Royal Auxiliary Air Force, the volunteer reserve part of the British Royal Air Force. The squadron won seven battle honours, flying Hurricane, Spitfire and Tempest fighter aircraft during World War II, and was one of the most...

       from 1930 to 1933 at RAF Filton
      RAF Filton
      RAF Filton was a World War II, Royal Air Force Sector Airfield situated at Filton Aerodrome about 5 miles north of the city centre of Bristol, England....

    • No. 600 Squadron RAF
      No. 600 Squadron RAF
      No. 600 Squadron RAuxAF is a squadron of the RAF Reserves. It was formed in 1925 and operated as a night fighter squadron during the Second World War with great distinction. After the war, 600 Squadron went on to operate jet fighters until 1957. Reactivated in 1999, 600 Squadron is the only RAF...

       from 1929 to 1935 at RAF Hendon
    • No. 601 Squadron RAF
      No. 601 Squadron RAF
      No. 601 Squadron was a squadron of the Royal Auxiliary Air Force, based in London. The squadron battle honours most notably include the Battle of Britain and the first Americans to fly in World War II were members of this squadron.-History:...

       from 1929 to 1933 at RAF Hendon
    • No. 602 Squadron RAF
      No. 602 Squadron RAF
      No 602 Squadron is a Royal Auxiliary Air Force squadron. Originally formed in 1925 as a light bomber squadron, its role changed in 1938 to army co-operation and in 1939 to that of a fighter squadron....

       from 1929 to 1934 at RAF Renfrew then RAF Abbotsinch
    • No. 603 Squadron RAF
      No. 603 Squadron RAF
      No. 603 Squadron is a squadron of the Royal Auxiliary Air Force, based in Edinburgh, Scotland. The primary role of 603 Squadron, since reforming on 1 October 1999, has been as a Survive to Operate squadron, as well as providing Force Protection.-Formation and early years:No...

       from 1930 to 1934 at RAF Turnhouse
    • No. 604 Squadron RAF
      No. 604 Squadron RAF
      No. 604 Squadron RAF was a squadron of the Royal Air Force notable for its pioneering role the development of radar-controlled night-fighter operations. The squadron was established in March 1930 at RAF Hendon as a day-bombing squadron of the Royal Auxiliary Air Force. In July 1934, the squadron...

       from 1930 to 1934 at RAF Hendon
    • No. 605 Squadron RAF
      No. 605 Squadron RAF
      No 605 Squadron was formed as an Auxiliary Air Force Squadron. Initially formed as a bomber unit, it was one of the most successful participants of the Battle of Britain. It also had the distinction of being active during World War II at two fronts at a time, when the squadron was split up between...

       from 1930 to 1934 at RAF Castle Bromwich
    • No. 607 Squadron RAF
      No. 607 Squadron RAF
      No. 607 Squadron was a squadron of the Royal Air Force. It was formed in 1930 as a bomber unit in the Auxiliary Air Force and changed in 1936 to the fighter role. It fought in that role during World War II on the European front and in Asia...

       from 1932 to 1937 at RAF Usworth
      RAF Usworth
      RAF Usworth was a Royal Air Force station near Sunderland. In 1958 the station was closed and the airfield became Sunderland Airport. Following the closure of the airport in 1984, the site has since been redeveloped as a manufacturing facility for Nissan cars.- Early history :In October 1916, the...

    • No. 608 Squadron RAF
      No. 608 Squadron RAF
      No. 608 Squadron was an Auxiliary Air Force squadron of the Royal Air Force during World War II. It flew during its existence as a bomber, fighter and reconnaissance unit and was the only RAF squadron to be equipped with the unsuccessful Blackburn Botha torpedo bomber.-Formation and early years:...

       from 1930 to 1937 at RAF Thornaby
      RAF Thornaby
      RAF Thornaby was a former RAF Station located at the Teesside town of Thornaby-on-Tees, North Yorkshire. The station was created in the mid 1920s and came under the control of No. 18 Group, RAF Coastal Command in 1939. Being used mostly for reconnaissance work, anti shipping strikes, and attacks on...


Variants

All built by Westland at Yeovil


  • Wapiti I - Initial production version for the RAF. Wooden structure. Powered by a 420 hp (313 kW) Bristol Jupiter VI
    Bristol Jupiter
    The Bristol Jupiter was a British nine-cylinder single-row piston radial engine built by the Bristol Aeroplane Company. Originally designed late in World War I and known as the Cosmos Jupiter, a lengthy series of upgrades and developments turned it into one of the finest engines of its era.The...

     radial piston engine. 25 built for RAF.
  • Wapiti IA - Improved version for the RAAF. Powered by a 480 hp (358 kW) geared Bristol Jupiter VIIIF radial piston engine and divided-axle main undercarriage. 28 built.
  • Wapiti IB - Similar to the Wapiti IA. Four exported to South Africa
    South Africa
    The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

    . Later re-engined with the 525 hp (392 kW) Armstrong Siddeley Panther
    Armstrong Siddeley Panther
    |-See also:-Bibliography:* Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6....

    . Increased fuel.
  • Wapiti II - Pre-production version with all-metal rear fuselage and wing structure replacing wooden structures of Wapiti I. Powered by Jupiter VIII engine. 10 built.
  • Wapiti IIA - Major production version with tropical equipment and partial dual controls, and able to use wheel or float landing gear. Initially powered by Jupiter VIII. 430 built.
  • Wapiti III - Two-seat general-purpose biplane for the SAAF based on Wapiti IIA. Powered by 480 hp (358 kW) Armstrong Siddeley Jaguar VI or 550 hp (410 kW) Panther VI engines. Four built by Westland followed by 27 under licence in SAAF Workshops.
  • Wapiti IV - Project for Hispano-Suiza 12N powered aircraft with long fuselage for Spain. One long fuselage aircraft designated Wapiti IV may have been delivered to Chinese Warlord Zhang Xueliang
    Zhang Xueliang
    Zhang Xueliang or Chang Hsüeh-liang , occasionally called Peter Hsueh Liang Chang in English, nicknamed the Young Marshal , was the effective ruler of Manchuria and much of North China after the assassination of his father, Zhang Zuolin, by the Japanese on 4 June 1928...

     in 1931.
  • Wapiti V - Long-fuselage army co-operation version for RAF, fitted with message pick-up hook, stronger undercarriage and powered by a 600 hp (448 kW) Jupiter VIIIF. 35 built.
  • Wapiti VI - Unarmed dual control training version for the RAF. 16 built.
  • Wapiti VII - Converted Wapiti V prototype, original designated the Houston-Wallace P.V.6 before reconversion to Wapiti VII experimental aircraft.
  • Wapiti VIII - Long fuselage version for Central Chinese
    China
    Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

     government. Powered by a Panther IIA, four built.

Specifications (Wapiti IIA)

See also

External links

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