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Armstrong Whitworth Whitley

The Armstrong Whitworth A.W.38 Whitley was a British medium bomber aircraft of the 1930s. It was one of three twin-engined, front line medium bomber types that were in service with the Royal Air Force (RAF) at the outbreak of the Second World War. Alongside the Vickers Wellington and the Handley Page Hampden, the Whitley was developed during the mid-1930s according to Air Ministry Specification B.3/34, which it was subsequently selected to meet. In 1937, the Whitley formally entered into RAF squadron service; it was the first of the three medium bombers to be introduced.

A.W.38 Whitley
Whitley Mk.V
Role Heavy bomber, night bomber
National origin United Kingdom
Manufacturer Armstrong Whitworth Aircraft
Designer John Lloyd
First flight 17 March 1936
Introduction 1937
Retired 1945
Status Retired
Primary user Royal Air Force
Number built 1,814[1]
Developed from Armstrong Whitworth AW.23

Following the outbreak of war in September 1939, the Whitley participated in the first RAF bombing raid upon German territory and remained an integral part of the early British bomber offensive. In 1942 it was superseded as a bomber by the larger four-engined "heavies" such as the Avro Lancaster.[2] Its front-line service included maritime reconnaissance with Coastal Command and the second line roles of glider-tug, trainer and transport aircraft. The type was also procured by British Overseas Airways Corporation as a civilian freighter aircraft. The aircraft was named after Whitley, a suburb of Coventry, home of Armstrong Whitworth's Whitley plant.

Development edit

Origins edit

 
Scale comparison diagram of the trio of British twin-engined medium bombers at the outbreak of the Second World War; the Whitley (pink), the Vickers Wellington (blue) and the Handley Page Hampden (yellow)

In July 1934, the Air Ministry issued Specification B.3/34, seeking a heavy night bomber/troop transport to replace the Handley Page Heyford biplane bomber.[3] This combination bomber/transport was part of the RAF's concept of fighting wars in distant British Empire locations, where the aircraft would fly into the theatre of action carrying troops and then provide air support.

John Lloyd, the Chief Designer of Armstrong Whitworth Aircraft, chose to respond to the specification with the AW.38 design, which later was given the name Whitley after the location of Armstrong Whitworth's main factory. The design of the AW.38 was a development of the Armstrong Whitworth AW.23 bomber-transport design that had lost to the Bristol Bombay for the earlier Specification C.26/31.[3]

Lloyd selected the Armstrong Siddeley Tiger IX radial engine to power the Whitley, which was capable of generating 795 hp (593 kW).[3] One of the novel features of the Whitley's design was the adoption of a three-bladed two-position variable-pitch propeller built by de Havilland; the Whitley was the first aircraft to fly with such an arrangement.[3]

As Lloyd was unfamiliar with the use of flaps on a large heavy monoplane, they were initially omitted from the design. To compensate, the mid-set wings were set at a high angle of incidence (8.5°) to confer good take-off and landing performance.[4] Flaps were included late in the design stage, the wing remained unaltered; as a result, the Whitley flew with a pronounced nose-down attitude when at cruising speed, resulting in considerable drag.[4][5]

The Whitley holds the distinction of having been the first RAF aircraft with a semi-monocoque fuselage, which was built using a slab-sided structure to ease production.[2] This replaced the tubular construction method traditionally employed by Armstrong Whitworth, who instead constructed the airframe from light-alloy rolled sections, pressings and corrugated sheets.[3] According to aviation author Philip Moyes, the decision to adopt the semi-monocoque fuselage was a significant advance in design; many Whitleys surviving severe damage on operations.[3]

In June 1935, owing to the urgent need to replace biplane heavy bombers then in service with the RAF, it was agreed to produce an initial 80 aircraft, 40 being of an early Whitley Mk I standard and the other 40 being more advanced Whitley Mk IIs.[4] Production was initially at three factories in Coventry; fuselages and detailed components were fabricated at Whitley Abbey, panel-beating and much of the detailed work at the former Coventry Ordnance Works factory, while wing fabrication and final assembly took placed at Baginton Aerodrome.[4] During 1935 and 1936, various contracts were placed for the type; the Whitley was ordered "off the drawing board" - prior to the first flights of any of the prototypes.[4]

On 17 March 1936, the first prototype Whitley Mk I, K4586, conducted its maiden flight from Baginton Aerodrome, piloted by Armstrong Whitworth Chief Test Pilot Alan Campbell-Orde.[6] K4586 was powered by a pair of 795 hp (593 kW) Armstrong Siddeley Tiger IX 14-cylinder air-cooled aircraft radial engines. The second prototype, K4587, was furnished with a pair of more powerful medium-supercharged Tiger XI engines.[7][6] The prototypes differed little from the initial production standard aircraft; a total of 34 production Whitley Mk I were completed.[6]

Further development edit

After the first 34 aircraft had been completed, the engines were replaced with the more reliable two-speed-supercharged Tiger VIIIs. K7243, the 27th production Whitley, is believed to have served as a prototype following modifications.[6] The resulting aircraft was designated as the Whitley Mk II. A total of 46 production aircraft were completed to the Whitley Mk II standard.[6] One Whitley Mk II, K7243, was used as a test bed for the 1,200 hp (890 kW) 21-cylinder radial Armstrong Siddeley Deerhound engine; on 6 January 1939, K7243 made its first flight with the Deerhound.[8][9] Another Whitley Mk I, K7208, was modified to operate with a higher (33,500 lb (15,200 kg)) gross weight.[10]

K7211, the 29th production Whitley, served as the prototype for a further advanced variant of the aircraft, the Whitley Mk III.[6] The Whitley Mk III featured numerous improvements, such as the replacement of the manually operated nose turret with a single powered Nash & Thompson turret and a powered retractable twin-gun ventral "dustbin" turret. The ventral turret was hydraulically-powered but proved to be hard to operate and added considerable drag, thus the Whitley Mk III was the only variant with it.[6] Other changes included increased dihedral of the outer wing panels, superior navigational provision and the installation of new bomb racks.[11] A total of 80 Whitley Mk III aircraft were manufactured.[6]

While the Tiger VIII engine used in the Whitley Mks II and III was more reliable than those used in early aircraft, the Whitley was re-engined with Rolls-Royce Merlin engines in 1938, giving rise to the Whitley Mk IV.[12] Three Whitley Mk I aircraft, K7208, K7209 and K7211, were initially re-engined to serve as prototypes. The new engines are credited with producing greatly improved performance.[2][12] Other changes made included the replacement of the manually operated tail and retractable ventral turrets with a Nash & Thompson powered tail turret equipped with four .303 in (7.7 mm) Browning machine guns, the increasing of fuel tankage capacity, including two additional fuel tanks in the wing.[12] A total of 40 Whitley Mk IV and Whitley Mk IVA, a sub-variant featuring more powerful models of the Merlin engine, were completed.[12]

The decision was made to introduce a series of other minor improvements to produce the Whitley Mk V. These included the modification of the tail fins and rudders, the fitting of leading edge de-icers, further fuel capacity increases, a smaller D/F loop in a streamlined fairing being adopted, and the extension of the rear fuselage by 15 in (381 mm) to improve the rear-gunner's field of fire.[13] The Whitley Mk V was by far the most numerous version of the aircraft, with 1,466 built until production ended in June 1943.[2][13]

The Whitley Mk VII was the final variant to be built. Unlike the other variants, it was developed for service with RAF Coastal Command and was thus furnished for maritime reconnaissance rather than as a general purpose bomber.[13] A Whitley Mk V, P3949 acted as a prototype for this variant. A total of 146 Whitley Mk VIIs were produced, additional Whitley Mk V aircraft being converted to the standard.[13] It had a sixth crew member to operate the new ASV Mk II radar system along with an increased fuel capacity for long endurance anti-shipping missions.[14] Some Whitley Mk VII were later converted as trainer aircraft, featuring additional seating and instrumentation for flight engineers.[10]

Early marks of the Whitley featured bomb bay doors, fitted on the fuselage and wing bays, that were held shut by bungee cords; during bombing operations, these were opened by the weight of the bombs as they fell on them and closed again by the bungee cord.[4][5] The short and unpredictable delay for the doors to open led to highly inaccurate bombing. The Mk.III introduced hydraulic doors which greatly improved bombing accuracy. To aim bombs, the bomb aimer opened a hatch in the nose of the aircraft, which extended the bomb sight out of the fuselage but the Mk IV replaced this hatch with a slightly extended transparent plexiglas panel, improving crew comfort.[12][15]

Design edit

 
A Browning machine gun being installed in a Whitley's turret, 1940

The Armstrong Whitworth Whitley was a twin-engined heavy bomber, initially being powered by a pair of 795 hp (593 kW). Armstrong Siddeley Tiger IX radial engines.[16] More advanced models of the Tiger engine equipped some of the later variants of the Whitley; starting with the Whitley Mk IV variant, the Tigers were replaced by a pair of 1,030 hp (770 kW) Rolls-Royce Merlin IV V12 engines.[11] According to Moyes, the adoption of the Merlin engine gave the Whitley a considerable boost in performance.[12]

The Whitley had a crew of five: a pilot, co-pilot/navigator, a bomb aimer, a wireless operator and a rear gunner. The pilot and second pilot/navigator sat side by side in the cockpit, with the wireless operator further back. The navigator, his seat mounted on rails and able to pivot, slid backwards and rotated to the left to use the chart table behind him after take-off.[15] The bomb aimer position was in the nose with a gun turret located directly above. The fuselage aft of the wireless operator was divided horizontally by the bomb bay; behind the bomb bay was the main entrance and aft of that the rear turret.[15] The bombs were stowed in two bomb bays housed within the fuselage, along with a further 14 smaller cells in the wing.[4] Other sources state there were 16 "cells", two groups of two in the fuselage and four groups of three in the wings, plus two smaller cells for parachute flares in the rear fuselage.[15] Bomb racks capable of holding larger bombs were installed on the Whitley Mk III variant.[6]

The early examples had a nose turret and rear turret, both being manually operated with one Vickers 0.303 machine gun apiece. On the Whitley Mk III this arrangement was substantially revised: a new retractable ventral 'dustbin' position was installed mounting twin .303 in (7.7 mm) Browning machine-guns and the nose turret was also upgraded to a Nash & Thompson power-operated turret.[6] On the Whitley Mk IV, the tail and ventral turrets were replaced with a Nash & Thompson power-operated tail turret mounting four Browning .303 machine guns; upon the adoption of this turret arrangement, the Whitley became the most powerfully armed bomber in the world against attacks from the rear.[12]

 
Paratroopers inside the fuselage of a Whitley, August 1942

The fuselage comprised three sections, with the main frames being riveted with the skin and the intermediate sections being riveted to the inside flanges of the longitudinal stringers.[3] Extensive use of Alclad sheeting was made. Fuel was carried in three tanks, a pair of 182 imp gal (830 L) tanks in the leading edge of each outer wing and one 155 imp gal (700 L) tank in the roof of the fuselage, over the spar center section; two auxiliary fuel tanks could be installed in the front fuselage bomb bay compartment. The inner leading edges contained the oil tanks, which doubled as radiant oil coolers.[4][15] To ease production, a deliberate effort was made to reduce component count and standardise parts.[3] The fuselage proved to be robust enough to withstand severe damage.[4]

The Whitley featured a large rectangular-shaped wing; its appearance led to the aircraft receiving the nickname "the flying barn door".[4] Like the fuselage, the wings were formed from three sections, being built up around a large box spar with the leading and trailing edges being fixed onto the spar at each rib point.[17] The forward surfaces of the wings were composed of flush-riveted, smooth and unstressed metal sheeting; the rear 2/3rds aft of the box spar to the trailing edge, as well as the ailerons and split flaps was fabric covered.[15][17] The inner structure of the split flaps was composed of duralumin and ran between the ailerons and the fuselage, being set at a 15–20 degree position for taking off and at a 60 degree position during landing.[4] The tailplanes employed a similar construction to that of the wings, the fins being braced to the fuselage using metal struts; the elevators and rudders incorporated servo-balancing trim tabs.[4]

Operational history edit

Military service edit

 
Whitley Mk.V production, 1941

On 9 March 1937, the Whitley Mk I began entering squadron service with No. 10 Squadron of the RAF, replacing their Handley Page Heyford biplanes.[18][19] In January 1938, the Whitley Mk II first entered squadron service with No. 58 Squadron and in August 1938, the Whitley Mk III first entered service with No. 51 Squadron.[19] In May 1939, the Whitley Mk IV first entered service with No. 10 Squadron and in August 1939, the Whitley Mk IVA first entered service with No. 78 Squadron.[19] By the outbreak of the Second World War, seven squadrons were operational, the majority of these flying Whitley III or IV aircraft, while the Whitley V had only just been introduced to service; 196 Whitleys were on charge with the RAF.[18][19][20]

At the start of the war, 4 Group, equipped with the Whitley, was the only trained night bomber force in the world.[19] Alongside the Handley Page Hampden and the Vickers Wellington, the Whitley bore the brunt of the early fighting and saw action during the first night of the war, when they dropped propaganda leaflets over Germany.[21] The propaganda flight made the Whitley the first aircraft of RAF Bomber Command to penetrate into Germany.[19] Further propaganda flights would travel as far as Berlin, Prague, and Warsaw.[22] On the night of 19/20 March 1940, in conjunction with Hampdens, the Whitley conducted the first bombing raid on German soil, attacking the Hörnum seaplane base on the Island of Sylt.[2][23] Following the Hörnum raid, Whitleys routinely patrolled the Frisian Islands, targeting shipping and seaplane activity.[19]

 
Merlin-powered prototype K7208 (converted Whitley Mk I), circa 1938

Unlike the Hampden and Wellington, which had met Specification B.9/32 for a day bomber, the Whitley was always intended for night operations and escaped the early heavy losses received during daylight raids carried out upon German shipping.[3] As the oldest of the three bombers, the Whitley was obsolete by the start of the war, yet over 1,000 more aircraft were produced before a suitable replacement was found. A particular problem with the radar-equipped Mk VII, with the addition of the drag-producing aerials, was that it could not maintain altitude on one engine. Whitleys flew a total of 8,996 operations with Bomber Command, dropped 9,845 tons (8,931 tonnes) of bombs and 269 aircraft were lost in action.[24]

On the night of 11/12 June 1940, the Whitley carried out Operation Haddock, the first RAF bombing raid on Italy, only a few hours after Italy's declaration of war; the Whitleys bombed Turin and Genoa, reaching northern Italy via a refuelling stop in the Channel Islands.[21][23] Many leading World War II bomber pilots of the RAF flew Whitleys at some point in their career, including Don Bennett, James Tait, and Leonard Cheshire.[25]

On the night of 10/11 February 1941, six Whitley Vs of 51 Squadron led by Tait took part in Operation Colossus, the first airborne operation undertaken by the British military, delivering paratroops to attack the Tragino Aqueduct in southern Italy. The Whitley was not always popular with paratroopers as they exited via a bin like chute in the floor. If this was not timed correctly the airflow would drag the paratrooper out resulting in nasty injuries to the face against the lip of the chute known as a Whitley kiss.[citation needed]

On the night of 29/30 April 1942 No. 58 Squadron, flying Whitleys, bombed the Port of Ostend in Belgium. This was the last operational mission by a Whitley-equipped bomber squadron.[26] In late 1942, the Whitley was retired from service as a frontline aircraft for bomber squadrons and was shifted to other roles. The type continued to operate delivering supplies and agents in the Special Duties squadrons (138 and 161) until December 1942, as well as serving as a transport for troops and freight, a carrier for paratroopers and a tow aircraft for gliders.[27] In 1940, the Whitley had been selected as the standard paratroop transport; in this role, the ventral turret aperture was commonly modified to be used for the egress of paratroopers.[26] No. 100 Group RAF used Whitleys to carry radar and electronic counter-measures. In February 1942, Whitleys were used to carry the paratroopers who participated in the Bruneval raid, code named Operation Biting, in which German radar components were captured from a German base on the coast of France.[27]

Long-range Coastal Command Mk VII variants were among the last Whitleys remaining in front-line service, remaining in service until early 1943.[26] The first U-boat kill attributed to the Whitley Mk VII was the sinking of the German submarine U-751 on 17 July 1942, which was achieved in combination with a Lancaster heavy bomber.[28][29] Having evaluated the Whitley in 1942, the Fleet Air Arm operated a number of modified ex-RAF Mk VIIs from 1944 to 1946, to train aircrew in Merlin engine management and fuel transfer procedures.[2]

Civilian service edit

In April/May 1942, the British Overseas Airways Corporation (BOAC) operated 15 Whitley Mk V aircraft which had been converted into freighters. The conversion process involved the removal of all armaments, the turret recesses were faired over, additional fuel tanks were installed in the bomb bay, the interior of the fuselage was adapted for freight stowage, and at least one aircraft was fitted with an enlarged cargo door.[19] The type was typically used for night supply flights from Gibraltar to Malta; the route took seven hours, and would often require landing during Axis air attacks on their arrival at Malta.[30] Whitley freighters also flew the dangerous route between RAF Leuchars, Scotland and Stockholm, Sweden.[19] The Whitley consumed a disproportionally large quantity of fuel to carry a relatively small payload and there were other reasons making the type less than ideal, so, in August 1942, the type was replaced by the Lockheed Hudson and the 14 survivors were returned to the RAF.[19][30]

Variants edit

 
A Whitley prototype, circa 1936
 
Personnel loading 250lb bombs into a Whitley Mk V of No. 502 Squadron, 1940

Following the two prototypes (K4586 and K4587), at the outbreak of the war the RAF had 207 Whitleys in service ranging from Mk I to Mk IV types, with improved versions following:

Mk I
A.W. Type 188. Powered by 795 hp (593 kW) Armstrong Siddeley Tiger IX air-cooled radial engines, 4 degrees of dihedral incorporated into each outer wing panel, with earlier aircraft being retrospectively modified: 34 built.[6]
Mk II
A.W. Type 197 (some Type 220). Powered by 920 hp (690 kW) two-speed supercharged Tiger VIII engines: 46 built.[6]
Mk III
A.W. Type 205. Powered by Tiger VIII engines, retractable "dustbin" ventral turret fitted aft of the wing root armed with two .303 in (7.7 mm) machine guns, hydraulically operated bomb bay doors and ability to carry larger bombs: 80 built.[6]
Mk IV
A.W. Type 209. Powered by 1,030 hp (770 kW) Rolls-Royce Merlin IV inline liquid-cooled engines, increased fuel capacity, extended bomb-aimer's transparency, manually operated tail and retractable ventral turrets replaced with a single Nash & Thompson powered tail turret equipped with four .303 in (7.7 mm) Browning machine guns, produced from 1938: 33 built.[12]
Mk IVA
A.W. Type 210. Mk IV variant powered by 1,145 hp (854 kW) Merlin X engines made by fitting Merlin X engines on last Mk IV's on production line: seven built.[12]
Mk V
A.W. Type 207. The main wartime production version based on the Mk IV, modified straight-edged fins, leading edge de-icing, tail fuselage aft or empennage extended by 15 in (381 mm) to improve the tail gunner's field of fire.[2] First flew in December 1938, production ceased in June 1943: 1,466 built.[13]
Mk VI
Proposed Pratt & Whitney G.R.1830 Twin Wasp-powered version of Mk V in case of Merlin production shortfall: none built.[13]
Mk VII
A.W. Type 217. Designed for service with Coastal Command and carried a sixth crew member, capable of longer-range flights (2,300 mi/3,700 km compared to the early version's 1,250 mi/2,011 km)[2] having additional fuel tanks fitted in the bomb bay and fuselage, equipped with Air to Surface Vessel (ASV) radar for anti-shipping patrols with an additional four 'stickleback' dorsal radar masts and other antennae: 146 built.[14] Being heavier, this mark could not maintain altitude on one engine.

Operators edit

 
The damaged port-side fuselage of Whitley Mk V P5005 'DY-N', of No. 102 Squadron, after returning from a bombing raid to the Ruhr on the night of 12/13 November 1940. It was hit by German anti-aircraft fire
 
Propaganda leaflets being loaded onto a Whitley, circa 1940
 
Women's Auxiliary Air Force (WAAF) personnel cleaning and painting a Whitley Mk V of No. 51 Squadron, circa 1942

Military operators edit

  United Kingdom

Civil operators edit

  United Kingdom

Surviving aircraft edit

 
Whitley Squadron War Memorial, Coventry, 2010

No complete aircraft of the 1,814 Whitleys produced remains. The Whitley Project is rebuilding an example from salvaged remains, and a fuselage section is displayed at the Midland Air Museum (MAM), whose site is adjacent to the airfield from where the Whitley's maiden flight took place.[32]

Specifications (Whitley Mk V) edit

 
Merlin-powered Whitley Mk.V drawing with inset profile of the Tiger-powered Mk III with retractable "dustbin" turret.
 
A preserved rear fuselage section at the Midland Air Museum, 2006

Data from The Whitley File[33]

General characteristics

  • Crew: 5
  • Length: 70 ft 6 in (21.49 m)
  • Wingspan: 84 ft 0 in (25.60 m)
  • Height: 15 ft 0 in (4.57 m)
  • Wing area: 1,137 sq ft (105.6 m2)
  • Empty weight: 19,300 lb (8,754 kg)
  • Max takeoff weight: 33,500 lb (15,195 kg)
  • Powerplant: 2 × Rolls-Royce Merlin X liquid-cooled V12 engines, 1,145 hp (854 kW) each

Performance

  • Maximum speed: 230 mph (370 km/h, 200 kn) at 16,400 ft (5,000 m)
  • Range: 1,650 mi (2,660 km, 1,430 nmi)
  • Ferry range: 2,400 mi (3,900 km, 2,100 nmi)
  • Service ceiling: 26,000 ft (7,900 m)
  • Rate of climb: 800 ft/min (4.1 m/s)

Armament

  • Guns: ** 1 × .303 in (7.7 mm) Vickers K machine gun in nose turret
  • Bombs: Up to 7,000 lb (3,175 kg) of bombs in the fuselage and 14 cells in the wings, typically including
    • 12 × 250 lb (113 kg) and
    • 2 × 500 lb (227 kg) bombs
    • Bombs as heavy as 2,000 lb (907 kg) could be carried

See also edit

External videos
  Video of Whitley Operations
  Period footage of Whitley Construction and Operations, Featuring Narration
  Compilation of several Whitley Paratroop Drops

Aircraft of comparable role, configuration, and era

Related lists

References edit

Notes edit

  1. ^ Moyes 1967, p. 16.
  2. ^ a b c d e f g h Crosby 2007, pp. 48–49.
  3. ^ a b c d e f g h i Moyes 1967, p. 3.
  4. ^ a b c d e f g h i j k l Moyes 1967, p. 4.
  5. ^ a b Gunston 1995
  6. ^ a b c d e f g h i j k l m Moyes 1967, p. 5.
  7. ^ Swanborough 1997, p. 8..
  8. ^ Roberts 1986, p. 8.
  9. ^ Moyes 1967, pp. 10-11.
  10. ^ a b Moyes 1967, p. 10.
  11. ^ a b Moyes 1967, pp. 5-6.
  12. ^ a b c d e f g h i Moyes 1967, p. 6.
  13. ^ a b c d e f Moyes 1967, p. 7.
  14. ^ a b Moyes 1967, pp. 7, 10.
  15. ^ a b c d e f Flight 21 October 1937, p. 402.
  16. ^ Moyes 1967, pp. 4-5.
  17. ^ a b Moyes 1967, pp. 3-4.
  18. ^ a b Mondey 1994, p. 18.
  19. ^ a b c d e f g h i j Moyes 1967, p. 11.
  20. ^ Thetford 1957, p. 27.
  21. ^ a b Green and Swanborough Air Enthusiast 1979, p. 22.
  22. ^ Moyes 1967, pp. 11-12.
  23. ^ a b Moyes 1967, p. 12.
  24. ^ Moyes 1976, p. 327.
  25. ^ Moyes 1967, pp. 12-13.
  26. ^ a b c Moyes 1967, p. 13.
  27. ^ a b Moyes 1967, pp. 13-14.
  28. ^ U-boat.net/ "U-206." uboat.net. Retrieved: 8 August 2010.
  29. ^ Uboat.net/ "U-751." uboat.net. Retrieved: 8 August 2010.
  30. ^ a b Jackson 1973, p. 325.
  31. ^ Roberts 1978, p. 62.
  32. ^ Roberts 1978, pp. 58–59.
  33. ^ Roberts 1986, p. 68

Bibliography edit

  • "A Modern Heavy Bomber." Flight, 21 October 1937, pp. 396–402.
  • Cheshire, Leonard. Leonard Cheshire V.C. Bomber Pilot. St. Albans, Herts, UK: Mayflower, 1975 (reprint of 1943 edition). ISBN 0-583-12541-7.
  • Crosby, F. (2007). The World Encyclopedia of Bombers. London: Anness. ISBN 978-1-84477-511-8.
  • Donald, David and Jon Lake. Encyclopedia of World Military Aircraft. London: AIRtime Publishing, 1996. ISBN 1-880588-24-2.
  • Green, William. Famous Bombers of the Second World War. London: Macdonald and Jane's, 1959, (third revised edition 1975). ISBN 0-356-08333-0.
  • Green, William and Gordon Swanborough. "Armstrong Whitworth's Willing Whitley" Air Enthusiast. No. 9, February–May 1979. Bromley, Kent, UK., pp. 10–25.
  • Green, William and Gordon Swanborough. WW2 Aircraft Fact Files: RAF Bombers, Part 1. London: Macdonald and Jane's, 1979. ISBN 0-354-01230-4.
  • Gunston, Bill (1995). Classic World War II Aircraft Cutaways. Botley: Osprey. ISBN 1-85532-526-8.
  • Jackson, A. J. British Civil Aircraft since 1919 (Volume 1). London: Putnam & Company Ltd., 1973. ISBN 0-370-10006-9.
  • Lawrence, Joseph (1945). The Observer's Book Of Airplanes. London and New York: Frederick Warne & Co.
  • Mason, Francis K. The British Bomber since 1914. London: Putnam Aeronautical Books, 1994. ISBN 0-85177-861-5.
  • Mondey, David (1994). The Hamlyn Concise Guide to British Aircraft of World War II. London: Chancellor Press. ISBN 1-85152-668-4.
  • Moyes, Philip J. R. The Armstrong Whitworth Whitley. Leatherhead, Surrey, UK: Profile Publications, 1967.
  • Moyes, Philip J. R. (1964). Bomber Squadrons of the RAF and Their Aircraft (1976 rev. ed.). London: Macdonald and Jane's. ISBN 0-354-01027-1.
  • Roberts, N. (1978). Armstrong Whitworth Whitley. Aircraft Crash Log. no isbn. Leeds: N. Roberts.
  • Roberts, R. N. (1986). The Whitley File. Tonbridge, Kent, UK: Air-Britain (Historians). ISBN 0-85130-127-4.
  • Swanborough, Gordon (1997). British Aircraft at War, 1939–1945. East Sussex: HPC. ISBN 0-9531421-0-8.
  • Thetford, Owen. Aircraft of the Royal Aircraft, 1918–57. London: Putnam & Company Ltd., 1957.
  • Turner-Hughes, Charles. "Armstrong Whitworth's Willing Whitley". Air Enthusiast, No. 9, February–May 1979, pp. 10–25. ISSN 0143-5450.
  • Wixey, Ken. Armstrong Whitworth Whitley (Warpaint Series No. 21). Denbigh East, Bletchley, UK: Hall Park Books, 1999. OCLC 65202527

External links edit

armstrong, whitworth, whitley, armstrong, whitworth, whitley, british, medium, bomber, aircraft, 1930s, three, twin, engined, front, line, medium, bomber, types, that, were, service, with, royal, force, outbreak, second, world, alongside, vickers, wellington, . The Armstrong Whitworth A W 38 Whitley was a British medium bomber aircraft of the 1930s It was one of three twin engined front line medium bomber types that were in service with the Royal Air Force RAF at the outbreak of the Second World War Alongside the Vickers Wellington and the Handley Page Hampden the Whitley was developed during the mid 1930s according to Air Ministry Specification B 3 34 which it was subsequently selected to meet In 1937 the Whitley formally entered into RAF squadron service it was the first of the three medium bombers to be introduced A W 38 WhitleyWhitley Mk VRole Heavy bomber night bomberNational origin United KingdomManufacturer Armstrong Whitworth AircraftDesigner John LloydFirst flight 17 March 1936Introduction 1937Retired 1945Status RetiredPrimary user Royal Air ForceNumber built 1 814 1 Developed from Armstrong Whitworth AW 23Following the outbreak of war in September 1939 the Whitley participated in the first RAF bombing raid upon German territory and remained an integral part of the early British bomber offensive In 1942 it was superseded as a bomber by the larger four engined heavies such as the Avro Lancaster 2 Its front line service included maritime reconnaissance with Coastal Command and the second line roles of glider tug trainer and transport aircraft The type was also procured by British Overseas Airways Corporation as a civilian freighter aircraft The aircraft was named after Whitley a suburb of Coventry home of Armstrong Whitworth s Whitley plant Contents 1 Development 1 1 Origins 1 2 Further development 2 Design 3 Operational history 3 1 Military service 3 2 Civilian service 4 Variants 5 Operators 5 1 Military operators 5 2 Civil operators 6 Surviving aircraft 7 Specifications Whitley Mk V 8 See also 9 References 9 1 Notes 9 2 Bibliography 10 External linksDevelopment editOrigins edit nbsp Scale comparison diagram of the trio of British twin engined medium bombers at the outbreak of the Second World War the Whitley pink the Vickers Wellington blue and the Handley Page Hampden yellow In July 1934 the Air Ministry issued Specification B 3 34 seeking a heavy night bomber troop transport to replace the Handley Page Heyford biplane bomber 3 This combination bomber transport was part of the RAF s concept of fighting wars in distant British Empire locations where the aircraft would fly into the theatre of action carrying troops and then provide air support John Lloyd the Chief Designer of Armstrong Whitworth Aircraft chose to respond to the specification with the AW 38 design which later was given the name Whitley after the location of Armstrong Whitworth s main factory The design of the AW 38 was a development of the Armstrong Whitworth AW 23 bomber transport design that had lost to the Bristol Bombay for the earlier Specification C 26 31 3 Lloyd selected the Armstrong Siddeley Tiger IX radial engine to power the Whitley which was capable of generating 795 hp 593 kW 3 One of the novel features of the Whitley s design was the adoption of a three bladed two position variable pitch propeller built by de Havilland the Whitley was the first aircraft to fly with such an arrangement 3 As Lloyd was unfamiliar with the use of flaps on a large heavy monoplane they were initially omitted from the design To compensate the mid set wings were set at a high angle of incidence 8 5 to confer good take off and landing performance 4 Flaps were included late in the design stage the wing remained unaltered as a result the Whitley flew with a pronounced nose down attitude when at cruising speed resulting in considerable drag 4 5 The Whitley holds the distinction of having been the first RAF aircraft with a semi monocoque fuselage which was built using a slab sided structure to ease production 2 This replaced the tubular construction method traditionally employed by Armstrong Whitworth who instead constructed the airframe from light alloy rolled sections pressings and corrugated sheets 3 According to aviation author Philip Moyes the decision to adopt the semi monocoque fuselage was a significant advance in design many Whitleys surviving severe damage on operations 3 In June 1935 owing to the urgent need to replace biplane heavy bombers then in service with the RAF it was agreed to produce an initial 80 aircraft 40 being of an early Whitley Mk I standard and the other 40 being more advanced Whitley Mk IIs 4 Production was initially at three factories in Coventry fuselages and detailed components were fabricated at Whitley Abbey panel beating and much of the detailed work at the former Coventry Ordnance Works factory while wing fabrication and final assembly took placed at Baginton Aerodrome 4 During 1935 and 1936 various contracts were placed for the type the Whitley was ordered off the drawing board prior to the first flights of any of the prototypes 4 On 17 March 1936 the first prototype Whitley Mk I K4586 conducted its maiden flight from Baginton Aerodrome piloted by Armstrong Whitworth Chief Test Pilot Alan Campbell Orde 6 K4586 was powered by a pair of 795 hp 593 kW Armstrong Siddeley Tiger IX 14 cylinder air cooled aircraft radial engines The second prototype K4587 was furnished with a pair of more powerful medium supercharged Tiger XI engines 7 6 The prototypes differed little from the initial production standard aircraft a total of 34 production Whitley Mk I were completed 6 Further development edit After the first 34 aircraft had been completed the engines were replaced with the more reliable two speed supercharged Tiger VIIIs K7243 the 27th production Whitley is believed to have served as a prototype following modifications 6 The resulting aircraft was designated as the Whitley Mk II A total of 46 production aircraft were completed to the Whitley Mk II standard 6 One Whitley Mk II K7243 was used as a test bed for the 1 200 hp 890 kW 21 cylinder radial Armstrong Siddeley Deerhound engine on 6 January 1939 K7243 made its first flight with the Deerhound 8 9 Another Whitley Mk I K7208 was modified to operate with a higher 33 500 lb 15 200 kg gross weight 10 K7211 the 29th production Whitley served as the prototype for a further advanced variant of the aircraft the Whitley Mk III 6 The Whitley Mk III featured numerous improvements such as the replacement of the manually operated nose turret with a single powered Nash amp Thompson turret and a powered retractable twin gun ventral dustbin turret The ventral turret was hydraulically powered but proved to be hard to operate and added considerable drag thus the Whitley Mk III was the only variant with it 6 Other changes included increased dihedral of the outer wing panels superior navigational provision and the installation of new bomb racks 11 A total of 80 Whitley Mk III aircraft were manufactured 6 While the Tiger VIII engine used in the Whitley Mks II and III was more reliable than those used in early aircraft the Whitley was re engined with Rolls Royce Merlin engines in 1938 giving rise to the Whitley Mk IV 12 Three Whitley Mk I aircraft K7208 K7209 and K7211 were initially re engined to serve as prototypes The new engines are credited with producing greatly improved performance 2 12 Other changes made included the replacement of the manually operated tail and retractable ventral turrets with a Nash amp Thompson powered tail turret equipped with four 303 in 7 7 mm Browning machine guns the increasing of fuel tankage capacity including two additional fuel tanks in the wing 12 A total of 40 Whitley Mk IV and Whitley Mk IVA a sub variant featuring more powerful models of the Merlin engine were completed 12 The decision was made to introduce a series of other minor improvements to produce the Whitley Mk V These included the modification of the tail fins and rudders the fitting of leading edge de icers further fuel capacity increases a smaller D F loop in a streamlined fairing being adopted and the extension of the rear fuselage by 15 in 381 mm to improve the rear gunner s field of fire 13 The Whitley Mk V was by far the most numerous version of the aircraft with 1 466 built until production ended in June 1943 2 13 The Whitley Mk VII was the final variant to be built Unlike the other variants it was developed for service with RAF Coastal Command and was thus furnished for maritime reconnaissance rather than as a general purpose bomber 13 A Whitley Mk V P3949 acted as a prototype for this variant A total of 146 Whitley Mk VIIs were produced additional Whitley Mk V aircraft being converted to the standard 13 It had a sixth crew member to operate the new ASV Mk II radar system along with an increased fuel capacity for long endurance anti shipping missions 14 Some Whitley Mk VII were later converted as trainer aircraft featuring additional seating and instrumentation for flight engineers 10 Early marks of the Whitley featured bomb bay doors fitted on the fuselage and wing bays that were held shut by bungee cords during bombing operations these were opened by the weight of the bombs as they fell on them and closed again by the bungee cord 4 5 The short and unpredictable delay for the doors to open led to highly inaccurate bombing The Mk III introduced hydraulic doors which greatly improved bombing accuracy To aim bombs the bomb aimer opened a hatch in the nose of the aircraft which extended the bomb sight out of the fuselage but the Mk IV replaced this hatch with a slightly extended transparent plexiglas panel improving crew comfort 12 15 Design edit nbsp A Browning machine gun being installed in a Whitley s turret 1940The Armstrong Whitworth Whitley was a twin engined heavy bomber initially being powered by a pair of 795 hp 593 kW Armstrong Siddeley Tiger IX radial engines 16 More advanced models of the Tiger engine equipped some of the later variants of the Whitley starting with the Whitley Mk IV variant the Tigers were replaced by a pair of 1 030 hp 770 kW Rolls Royce Merlin IV V12 engines 11 According to Moyes the adoption of the Merlin engine gave the Whitley a considerable boost in performance 12 The Whitley had a crew of five a pilot co pilot navigator a bomb aimer a wireless operator and a rear gunner The pilot and second pilot navigator sat side by side in the cockpit with the wireless operator further back The navigator his seat mounted on rails and able to pivot slid backwards and rotated to the left to use the chart table behind him after take off 15 The bomb aimer position was in the nose with a gun turret located directly above The fuselage aft of the wireless operator was divided horizontally by the bomb bay behind the bomb bay was the main entrance and aft of that the rear turret 15 The bombs were stowed in two bomb bays housed within the fuselage along with a further 14 smaller cells in the wing 4 Other sources state there were 16 cells two groups of two in the fuselage and four groups of three in the wings plus two smaller cells for parachute flares in the rear fuselage 15 Bomb racks capable of holding larger bombs were installed on the Whitley Mk III variant 6 The early examples had a nose turret and rear turret both being manually operated with one Vickers 0 303 machine gun apiece On the Whitley Mk III this arrangement was substantially revised a new retractable ventral dustbin position was installed mounting twin 303 in 7 7 mm Browning machine guns and the nose turret was also upgraded to a Nash amp Thompson power operated turret 6 On the Whitley Mk IV the tail and ventral turrets were replaced with a Nash amp Thompson power operated tail turret mounting four Browning 303 machine guns upon the adoption of this turret arrangement the Whitley became the most powerfully armed bomber in the world against attacks from the rear 12 nbsp Paratroopers inside the fuselage of a Whitley August 1942The fuselage comprised three sections with the main frames being riveted with the skin and the intermediate sections being riveted to the inside flanges of the longitudinal stringers 3 Extensive use of Alclad sheeting was made Fuel was carried in three tanks a pair of 182 imp gal 830 L tanks in the leading edge of each outer wing and one 155 imp gal 700 L tank in the roof of the fuselage over the spar center section two auxiliary fuel tanks could be installed in the front fuselage bomb bay compartment The inner leading edges contained the oil tanks which doubled as radiant oil coolers 4 15 To ease production a deliberate effort was made to reduce component count and standardise parts 3 The fuselage proved to be robust enough to withstand severe damage 4 The Whitley featured a large rectangular shaped wing its appearance led to the aircraft receiving the nickname the flying barn door 4 Like the fuselage the wings were formed from three sections being built up around a large box spar with the leading and trailing edges being fixed onto the spar at each rib point 17 The forward surfaces of the wings were composed of flush riveted smooth and unstressed metal sheeting the rear 2 3rds aft of the box spar to the trailing edge as well as the ailerons and split flaps was fabric covered 15 17 The inner structure of the split flaps was composed of duralumin and ran between the ailerons and the fuselage being set at a 15 20 degree position for taking off and at a 60 degree position during landing 4 The tailplanes employed a similar construction to that of the wings the fins being braced to the fuselage using metal struts the elevators and rudders incorporated servo balancing trim tabs 4 Operational history editMilitary service edit nbsp Whitley Mk V production 1941On 9 March 1937 the Whitley Mk I began entering squadron service with No 10 Squadron of the RAF replacing their Handley Page Heyford biplanes 18 19 In January 1938 the Whitley Mk II first entered squadron service with No 58 Squadron and in August 1938 the Whitley Mk III first entered service with No 51 Squadron 19 In May 1939 the Whitley Mk IV first entered service with No 10 Squadron and in August 1939 the Whitley Mk IVA first entered service with No 78 Squadron 19 By the outbreak of the Second World War seven squadrons were operational the majority of these flying Whitley III or IV aircraft while the Whitley V had only just been introduced to service 196 Whitleys were on charge with the RAF 18 19 20 At the start of the war 4 Group equipped with the Whitley was the only trained night bomber force in the world 19 Alongside the Handley Page Hampden and the Vickers Wellington the Whitley bore the brunt of the early fighting and saw action during the first night of the war when they dropped propaganda leaflets over Germany 21 The propaganda flight made the Whitley the first aircraft of RAF Bomber Command to penetrate into Germany 19 Further propaganda flights would travel as far as Berlin Prague and Warsaw 22 On the night of 19 20 March 1940 in conjunction with Hampdens the Whitley conducted the first bombing raid on German soil attacking the Hornum seaplane base on the Island of Sylt 2 23 Following the Hornum raid Whitleys routinely patrolled the Frisian Islands targeting shipping and seaplane activity 19 nbsp Merlin powered prototype K7208 converted Whitley Mk I circa 1938Unlike the Hampden and Wellington which had met Specification B 9 32 for a day bomber the Whitley was always intended for night operations and escaped the early heavy losses received during daylight raids carried out upon German shipping 3 As the oldest of the three bombers the Whitley was obsolete by the start of the war yet over 1 000 more aircraft were produced before a suitable replacement was found A particular problem with the radar equipped Mk VII with the addition of the drag producing aerials was that it could not maintain altitude on one engine Whitleys flew a total of 8 996 operations with Bomber Command dropped 9 845 tons 8 931 tonnes of bombs and 269 aircraft were lost in action 24 On the night of 11 12 June 1940 the Whitley carried out Operation Haddock the first RAF bombing raid on Italy only a few hours after Italy s declaration of war the Whitleys bombed Turin and Genoa reaching northern Italy via a refuelling stop in the Channel Islands 21 23 Many leading World War II bomber pilots of the RAF flew Whitleys at some point in their career including Don Bennett James Tait and Leonard Cheshire 25 On the night of 10 11 February 1941 six Whitley Vs of 51 Squadron led by Tait took part in Operation Colossus the first airborne operation undertaken by the British military delivering paratroops to attack the Tragino Aqueduct in southern Italy The Whitley was not always popular with paratroopers as they exited via a bin like chute in the floor If this was not timed correctly the airflow would drag the paratrooper out resulting in nasty injuries to the face against the lip of the chute known as a Whitley kiss citation needed On the night of 29 30 April 1942 No 58 Squadron flying Whitleys bombed the Port of Ostend in Belgium This was the last operational mission by a Whitley equipped bomber squadron 26 In late 1942 the Whitley was retired from service as a frontline aircraft for bomber squadrons and was shifted to other roles The type continued to operate delivering supplies and agents in the Special Duties squadrons 138 and 161 until December 1942 as well as serving as a transport for troops and freight a carrier for paratroopers and a tow aircraft for gliders 27 In 1940 the Whitley had been selected as the standard paratroop transport in this role the ventral turret aperture was commonly modified to be used for the egress of paratroopers 26 No 100 Group RAF used Whitleys to carry radar and electronic counter measures In February 1942 Whitleys were used to carry the paratroopers who participated in the Bruneval raid code named Operation Biting in which German radar components were captured from a German base on the coast of France 27 Long range Coastal Command Mk VII variants were among the last Whitleys remaining in front line service remaining in service until early 1943 26 The first U boat kill attributed to the Whitley Mk VII was the sinking of the German submarine U 751 on 17 July 1942 which was achieved in combination with a Lancaster heavy bomber 28 29 Having evaluated the Whitley in 1942 the Fleet Air Arm operated a number of modified ex RAF Mk VIIs from 1944 to 1946 to train aircrew in Merlin engine management and fuel transfer procedures 2 Civilian service edit In April May 1942 the British Overseas Airways Corporation BOAC operated 15 Whitley Mk V aircraft which had been converted into freighters The conversion process involved the removal of all armaments the turret recesses were faired over additional fuel tanks were installed in the bomb bay the interior of the fuselage was adapted for freight stowage and at least one aircraft was fitted with an enlarged cargo door 19 The type was typically used for night supply flights from Gibraltar to Malta the route took seven hours and would often require landing during Axis air attacks on their arrival at Malta 30 Whitley freighters also flew the dangerous route between RAF Leuchars Scotland and Stockholm Sweden 19 The Whitley consumed a disproportionally large quantity of fuel to carry a relatively small payload and there were other reasons making the type less than ideal so in August 1942 the type was replaced by the Lockheed Hudson and the 14 survivors were returned to the RAF 19 30 Variants edit nbsp A Whitley prototype circa 1936 nbsp Personnel loading 250lb bombs into a Whitley Mk V of No 502 Squadron 1940Following the two prototypes K4586 and K4587 at the outbreak of the war the RAF had 207 Whitleys in service ranging from Mk I to Mk IV types with improved versions following Mk I A W Type 188 Powered by 795 hp 593 kW Armstrong Siddeley Tiger IX air cooled radial engines 4 degrees of dihedral incorporated into each outer wing panel with earlier aircraft being retrospectively modified 34 built 6 Mk II A W Type 197 some Type 220 Powered by 920 hp 690 kW two speed supercharged Tiger VIII engines 46 built 6 Mk III A W Type 205 Powered by Tiger VIII engines retractable dustbin ventral turret fitted aft of the wing root armed with two 303 in 7 7 mm machine guns hydraulically operated bomb bay doors and ability to carry larger bombs 80 built 6 Mk IV A W Type 209 Powered by 1 030 hp 770 kW Rolls Royce Merlin IV inline liquid cooled engines increased fuel capacity extended bomb aimer s transparency manually operated tail and retractable ventral turrets replaced with a single Nash amp Thompson powered tail turret equipped with four 303 in 7 7 mm Browning machine guns produced from 1938 33 built 12 Mk IVA A W Type 210 Mk IV variant powered by 1 145 hp 854 kW Merlin X engines made by fitting Merlin X engines on last Mk IV s on production line seven built 12 Mk V A W Type 207 The main wartime production version based on the Mk IV modified straight edged fins leading edge de icing tail fuselage aft or empennage extended by 15 in 381 mm to improve the tail gunner s field of fire 2 First flew in December 1938 production ceased in June 1943 1 466 built 13 Mk VI Proposed Pratt amp Whitney G R 1830 Twin Wasp powered version of Mk V in case of Merlin production shortfall none built 13 Mk VII A W Type 217 Designed for service with Coastal Command and carried a sixth crew member capable of longer range flights 2 300 mi 3 700 km compared to the early version s 1 250 mi 2 011 km 2 having additional fuel tanks fitted in the bomb bay and fuselage equipped with Air to Surface Vessel ASV radar for anti shipping patrols with an additional four stickleback dorsal radar masts and other antennae 146 built 14 Being heavier this mark could not maintain altitude on one engine Operators edit nbsp The damaged port side fuselage of Whitley Mk V P5005 DY N of No 102 Squadron after returning from a bombing raid to the Ruhr on the night of 12 13 November 1940 It was hit by German anti aircraft fire nbsp Propaganda leaflets being loaded onto a Whitley circa 1940 nbsp Women s Auxiliary Air Force WAAF personnel cleaning and painting a Whitley Mk V of No 51 Squadron circa 1942Military operators edit nbsp United Kingdom Royal Air Force No 7 Squadron RAF between March 1938 and May 1939 No 10 Squadron RAF between March 1937 and December 1941 No 51 Squadron RAF between February 1938 and October 1942 No 53 Squadron RAF between February 1943 and May 1943 No 58 Squadron RAF between October 1937 and January 1943 No 76 Squadron RAF between September 1939 and April 1940 No 77 Squadron RAF between November 1938 and October 1942 No 78 Squadron RAF between July 1937 and March 1942 No 97 Squadron RAF between February 1939 and May 1940 No 102 Squadron RAF between October 1938 and February 1942 No 103 Squadron RAF between October 1940 and June 1942 No 109 Squadron RAF operated only one aircraft P5047 No 115 Squadron RAF during 1938 31 No 138 Squadron RAF between August 1941 and October 1942 No 161 Squadron RAF between February 1942 and December 1942 No 166 Squadron RAF between July 1938 and April 1940 No 295 Squadron RAF between August 1942 and November 1943 No 296 Squadron RAF between June 1943 and March 1943 No 297 Squadron RAF between February 1942 and February 1944 No 298 Squadron RAF between August 1942 and October 1942 No 299 Squadron RAF between November 1943 and January 1944 No 502 Squadron RAF between October 1940 and February 1943 No 612 Squadron RAF between November 1940 and June 1943 No 619 Squadron RAF between April 1943 and January 1944 No 1419 Flight RAF No 1473 Flight RAF No 1478 Flight RAF No 1481 Flight RAF No 1484 Flight RAF No 1485 Flight RAF No 1486 Flight RAF No 1 Coastal Operational Training Unit RAF No 10 Operational Training Unit RAF No 81 Operational Training Unit RAF No 19 Operational Training Unit RAF No 24 Operational Training Unit RAF No 29 Operational Training Unit RAF No 58 Operational Training Unit RAF No 81 Operational Training Unit RAF No 83 Operational Training Unit RAF Parachute Training School Parachute Section 13 Maintenance Unit Fleet Air Arm 734 Naval Air Squadron operated Whitleys between February 1944 and February 1946 Civil operators edit nbsp United KingdomBritish Overseas Airways CorporationSurviving aircraft edit nbsp Whitley Squadron War Memorial Coventry 2010No complete aircraft of the 1 814 Whitleys produced remains The Whitley Project is rebuilding an example from salvaged remains and a fuselage section is displayed at the Midland Air Museum MAM whose site is adjacent to the airfield from where the Whitley s maiden flight took place 32 Specifications Whitley Mk V edit nbsp Merlin powered Whitley Mk V drawing with inset profile of the Tiger powered Mk III with retractable dustbin turret nbsp A preserved rear fuselage section at the Midland Air Museum 2006Data from The Whitley File 33 General characteristicsCrew 5 Length 70 ft 6 in 21 49 m Wingspan 84 ft 0 in 25 60 m Height 15 ft 0 in 4 57 m Wing area 1 137 sq ft 105 6 m2 Empty weight 19 300 lb 8 754 kg Max takeoff weight 33 500 lb 15 195 kg Powerplant 2 Rolls Royce Merlin X liquid cooled V12 engines 1 145 hp 854 kW eachPerformance Maximum speed 230 mph 370 km h 200 kn at 16 400 ft 5 000 m Range 1 650 mi 2 660 km 1 430 nmi Ferry range 2 400 mi 3 900 km 2 100 nmi Service ceiling 26 000 ft 7 900 m Rate of climb 800 ft min 4 1 m s Armament Guns 1 303 in 7 7 mm Vickers K machine gun in nose turret 4 303 in Browning machine guns in tail turret Bombs Up to 7 000 lb 3 175 kg of bombs in the fuselage and 14 cells in the wings typically including 12 250 lb 113 kg and 2 500 lb 227 kg bombs Bombs as heavy as 2 000 lb 907 kg could be carriedSee also editExternal videos nbsp Video of Whitley Operations nbsp Period footage of Whitley Construction and Operations Featuring Narration nbsp Compilation of several Whitley Paratroop DropsAircraft of comparable role configuration and era Handley Page Hampden Handley Page H P 54 Harrow Vickers Wellington Mitsubishi G3MRelated lists List of aircraft of World War II List of aircraft of the RAF List of bomber aircraftReferences editNotes edit Moyes 1967 p 16 a b c d e f g h Crosby 2007 pp 48 49 a b c d e f g h i Moyes 1967 p 3 a b c d e f g h i j k l Moyes 1967 p 4 a b Gunston 1995 a b c d e f g h i j k l m Moyes 1967 p 5 Swanborough 1997 p 8 Roberts 1986 p 8 Moyes 1967 pp 10 11 a b Moyes 1967 p 10 a b Moyes 1967 pp 5 6 a b c d e f g h i Moyes 1967 p 6 a b c d e f Moyes 1967 p 7 a b Moyes 1967 pp 7 10 a b c d e f Flight 21 October 1937 p 402 Moyes 1967 pp 4 5 a b Moyes 1967 pp 3 4 a b Mondey 1994 p 18 a b c d e f g h i j Moyes 1967 p 11 Thetford 1957 p 27 a b Green and Swanborough Air Enthusiast 1979 p 22 Moyes 1967 pp 11 12 a b Moyes 1967 p 12 Moyes 1976 p 327 Moyes 1967 pp 12 13 a b c Moyes 1967 p 13 a b Moyes 1967 pp 13 14 U boat net U 206 uboat net Retrieved 8 August 2010 Uboat net U 751 uboat net Retrieved 8 August 2010 a b Jackson 1973 p 325 Roberts 1978 p 62 Roberts 1978 pp 58 59 Roberts 1986 p 68 Bibliography edit A Modern Heavy Bomber Flight 21 October 1937 pp 396 402 Cheshire Leonard Leonard Cheshire V C Bomber Pilot St Albans Herts UK Mayflower 1975 reprint of 1943 edition ISBN 0 583 12541 7 Crosby F 2007 The World Encyclopedia of Bombers London Anness ISBN 978 1 84477 511 8 Donald David and Jon Lake Encyclopedia of World Military Aircraft London AIRtime Publishing 1996 ISBN 1 880588 24 2 Green William Famous Bombers of the Second World War London Macdonald and Jane s 1959 third revised edition 1975 ISBN 0 356 08333 0 Green William and Gordon Swanborough Armstrong Whitworth s Willing Whitley Air Enthusiast No 9 February May 1979 Bromley Kent UK pp 10 25 Green William and Gordon Swanborough WW2 Aircraft Fact Files RAF Bombers Part 1 London Macdonald and Jane s 1979 ISBN 0 354 01230 4 Gunston Bill 1995 Classic World War II Aircraft Cutaways Botley Osprey ISBN 1 85532 526 8 Jackson A J British Civil Aircraft since 1919 Volume 1 London Putnam amp Company Ltd 1973 ISBN 0 370 10006 9 Lawrence Joseph 1945 The Observer s Book Of Airplanes London and New York Frederick Warne amp Co Mason Francis K The British Bomber since 1914 London Putnam Aeronautical Books 1994 ISBN 0 85177 861 5 Mondey David 1994 The Hamlyn Concise Guide to British Aircraft of World War II London Chancellor Press ISBN 1 85152 668 4 Moyes Philip J R The Armstrong Whitworth Whitley Leatherhead Surrey UK Profile Publications 1967 Moyes Philip J R 1964 Bomber Squadrons of the RAF and Their Aircraft 1976 rev ed London Macdonald and Jane s ISBN 0 354 01027 1 Roberts N 1978 Armstrong Whitworth Whitley Aircraft Crash Log no isbn Leeds N Roberts Roberts R N 1986 The Whitley File Tonbridge Kent UK Air Britain Historians ISBN 0 85130 127 4 Swanborough Gordon 1997 British Aircraft at War 1939 1945 East Sussex HPC ISBN 0 9531421 0 8 Thetford Owen Aircraft of the Royal Aircraft 1918 57 London Putnam amp Company Ltd 1957 Turner Hughes Charles Armstrong Whitworth s Willing Whitley Air Enthusiast No 9 February May 1979 pp 10 25 ISSN 0143 5450 Wixey Ken Armstrong Whitworth Whitley Warpaint Series No 21 Denbigh East Bletchley UK Hall Park Books 1999 OCLC 65202527External links edit nbsp Wikimedia Commons has media related to Armstrong Whitworth Whitley The Whitley Project Flight cutaway of Whitley Machine Gun Skeet Archived 6 October 2012 at the Wayback Machine August 1940 Popular Mechanics Retrieved from https en wikipedia org w index php title Armstrong Whitworth Whitley amp oldid 1209936637, wikipedia, wiki, book, books, library,

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