Handley Page Heyford
Encyclopedia
The Handley Page Heyford was a twin-engine 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...
biplane
Biplane
A biplane is a fixed-wing aircraft with two superimposed main wings. The Wright brothers' Wright Flyer used a biplane design, as did most aircraft in the early years of aviation. While a biplane wing structure has a structural advantage, it produces more drag than a similar monoplane wing...
bomber
Bomber
A bomber is a military aircraft designed to attack ground and sea targets, by dropping bombs on them, or – in recent years – by launching cruise missiles at them.-Classifications of bombers:...
of the 1930s. Although it had a short service life, it equipped several squadrons of the RAF
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...
as one of the most important British bombers of the mid-1930s, and was the last biplane
Biplane
A biplane is a fixed-wing aircraft with two superimposed main wings. The Wright brothers' Wright Flyer used a biplane design, as did most aircraft in the early years of aviation. While a biplane wing structure has a structural advantage, it produces more drag than a similar monoplane wing...
heavy bomber
Heavy bomber
A heavy bomber is a bomber aircraft of the largest size and load carrying capacity, and usually the longest range.In New START, the term "heavy bomber" is used for two types of bombers:*one with a range greater than 8,000 kilometers...
to serve with the RAF.
Design and development
The Heyford was built to meet Air Ministry specification B.19/27 for a heavy night bomber to replace the Vickers VirginiaVickers Virginia
|-See also:-References:NotesBibliography* Andrews, C.F. and E.B. Morgan. Vickers Aircraft since 1908. London: Putnam, 1989. ISBN 0-85177-851-1....
, which required a twin-engined aircraft capable of carrying 1,546 lb (700 kg) of bombs and flying 920 miles at 115 mph (185 km/h). The specification resulted in a large number of proposals being submitted by the British aircraft industry, with designs by Fairey (the Fairey Hendon
Fairey Hendon
|-See also:-References:NotesBibliography* Crosby, Francis. The World Encyclopedia of Fighters and Bombers. London: Lorenz Books ISBN 0-75481-616-8* Gallop, Alan. Time Flies: Heathrow At 60. Stroud: Sutton Publishing, 2005. ISBN 0-7509-3840-4...
) and Vickers
Vickers
Vickers was a famous name in British engineering that existed through many companies from 1828 until 1999.-Early history:Vickers was formed in Sheffield as a steel foundry by the miller Edward Vickers and his father-in-law George Naylor in 1828. Naylor was a partner in the foundry Naylor &...
(the Type 150
Vickers Vanox
-See also:-References:* Andrews, E.N.; Morgan, E.B. Vickers Aircraft Since 1908, London: Putnam, Second Edition, 1988. ISBN 0-85177-815-1.* Mason, Francis K. The British Bomber since 1914. London: Putnam Aeronautical Books, 1994. ISBN 0-85177-861-5....
and Type 163
Vickers Type 163
-References:* Mason, Francis K. The British Bomber since 1914. London: Putnam Aeronautical Books, 1994. ISBN 0-85177-861-5.* http://www.britishaircraft.co.uk/aircraftpage.php?ID=634...
) being built as well as Handley Page's design. The prototype, the Handley Page HP.38, was designed by Handley Page's lead designer G. R. Volkert and first flew on 12 June 1930 at Handley Page's factory at Radlett
Radlett
Radlett is a small town in the county of Hertfordshire between St Albans and Borehamwood on Watling Street with a population of approximately 8,000. It is located in the council district of Hertsmere and is covered by two wards, Aldenham East and Aldenham West...
, powered by two 525 hp (390 kW) Rolls-Royce Kestrel
Rolls-Royce Kestrel
|-See also:-Bibliography:* Erfurth, Helmut. Junkers Ju 87 . Bonn, Germany: Bernard & Graefe Verlag, 2004. ISBN 1-85780-186-5....
II engines driving two-blade propellers.
The aircraft was of mixed construction having fabric-covered, two-bay
Interplane strut
An interplane strut is an aircraft airframe component designed to transmit lift and landing loads between wing panels on biplanes and other aircraft with multi-wing designs. They also maintain the correct angle of incidence for the connected wing panels and are often braced with wires...
metal-frame wings, while the fuselage
Fuselage
The fuselage is an aircraft's main body section that holds crew and passengers or cargo. In single-engine aircraft it will usually contain an engine, although in some amphibious aircraft the single engine is mounted on a pylon attached to the fuselage which in turn is used as a floating hull...
had an aluminium
Aluminium
Aluminium or aluminum is a silvery white member of the boron group of chemical elements. It has the symbol Al, and its atomic number is 13. It is not soluble in water under normal circumstances....
monocoque
Monocoque
Monocoque is a construction technique that supports structural load by using an object's external skin, as opposed to using an internal frame or truss that is then covered with a non-load-bearing skin or coachwork...
forward section with a fabric-covered frame to the rear, It had a crew of four, consisting of a pilot, a bomb aimer
Bombardier (air force)
A bombardier , in the United States Army Air Forces and United States Air Force, or a bomb aimer, in the Royal Air Force and other Commonwealth air forces, was the crewman of a bomber responsible for assisting the navigator in guiding the plane to a bombing target and releasing the aircraft's bomb...
/navigator/gunner a radio operator and a dorsal/ventral gunner. Open positions were provided for the pilot and both the nose and dorsal gunners. The Heyford had a novel configuration, with the fuselage attached to the upper wing and the bomb bay in the thickened centre lower wing. This provided a good defensive field of fire for the nose and dorsal guns as well as the ventral retractable "dustbin" turret
Turret
In architecture, a turret is a small tower that projects vertically from the wall of a building such as a medieval castle. Turrets were used to provide a projecting defensive position allowing covering fire to the adjacent wall in the days of military fortification...
, each equipped with a single .303 in (7.7 mm) 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...
. The fixed undercarriage
Undercarriage
The undercarriage or landing gear in aviation, is the structure that supports an aircraft on the ground and allows it to taxi, takeoff and land...
consisted of large, spat-covered wheels. The design allowed ground crews to safely attach bombs while the engines were running, but the result was that the pilot was some 17 ft (5 m) off the ground.
The HP.38 proved successful during service trials at Martlesham Heath
RAF Martlesham Heath
RAF Martlesham Heath is a former Royal Air Force airfield in England. The field is located 1½ miles SW of Woodbridge, Suffolk.- RFC/RAF prewar use:Martlesham Heath was first used as a Royal Flying Corps airfield during World War I...
and with No. 10 Squadron RAF
No. 10 Squadron RAF
No. 10 Squadron was a Royal Air Force squadron. The squadron served in a variety of roles over its 90 year history...
and was chosen as the winner of the B19/27 competition, being ordered as the HP.50 Heyford. Production Heyford Is were fitted with 575 hp (429 kW) Kestrel III engines and retained the two-blade propellers, while the IAs had four-blade propellers. Engine variations marked the main Mk II and III differences; the former being equipped with 640 hp (480 kW) Kestrel IVs, supercharged
Supercharger
A supercharger is an air compressor used for forced induction of an internal combustion engine.The greater mass flow-rate provides more oxygen to support combustion than would be available in a naturally aspirated engine, which allows more fuel to be burned and more work to be done per cycle,...
to 695 hp (518 kW) in the Heyford III.
Operational history
The Heyford I entered service with No. 99 Squadron RAF
No. 99 Squadron RAF
No. 99 Squadron of the Royal Air Force was a bomber squadron in both first and second world war. At present it operates the Boeing C-17 Globemaster III from RAF Brize Norton, the RAF's air transport hub. The squadron was the first RAF unit to receive the Avro Aldershot, Handley Page Hyderabad,...
, at RAF Upper Heyford
RAF Upper Heyford
RAF Upper Heyford was a Royal Air Force station located north-west of Bicester near the village of Upper Heyford, Oxfordshire, England. The base was brought into use for flying in July 1918 by the Royal Flying Corps. During World War II it was used by many units of the RAF, mainly as a training...
in November 1933, and later with No. 10 Squadron and 7 Squadron
No. 7 Squadron RAF
No. 7 Squadron of the Royal Air Force operates the Boeing Chinook HC.2 from RAF Odiham, Hampshire.-Formation and early years:No. 7 Squadron was formed at Farnborough Airfield on 1 May 1914 as the last squadron of the RFC to be formed before the First World War, but has been disbanded and reformed...
, re-equipping with the Heyford IA and II in August 1934 and April 1935 respectively. As part of the RAF's Expansion scheme, orders were placed for 70 Heyford IIIs in 1936, with steam condenser-cooled Rolls-Royce Kestrel
Rolls-Royce Kestrel
|-See also:-Bibliography:* Erfurth, Helmut. Junkers Ju 87 . Bonn, Germany: Bernard & Graefe Verlag, 2004. ISBN 1-85780-186-5....
VI engines. The delivery of these aircraft allowed the RAF to have nine operational Heyford Squadrons by the end of 1936.
These squadrons of Heyfords formed the major part of Bomber Command
RAF Bomber Command
RAF Bomber Command controlled the RAF's bomber forces from 1936 to 1968. During World War II the command destroyed a significant proportion of Nazi Germany's industries and many German cities, and in the 1960s stood at the peak of its postwar military power with the V bombers and a supplemental...
's night bomber strength in the late 1930s. Heyfords flew many long night exercises, sometimes flying mock attacks against targets in France. Disaster struck on one of these long-range exercises on 12 December 1936, when a flight of seven Heyfords of No. 102 Squadron RAF
No. 102 Squadron RAF
No. 102 Squadron was a Royal Air Force night bomber squadron in World War I and a heavy bomber squadron in World War II. After the war it flew briefly as a transport squadron before being reformed a light bomber unit with the Second Tactical Air Force within RAF Germany. Its last existence was as a...
flying from Northern Ireland, encountered fog and icy weather conditions as they approached their base at RAF Finningley
RAF Finningley
RAF Finningley is a former Royal Air Force station at Finningley, South Yorkshire, partly within the traditional county boundaries of Nottinghamshire and partly in the West Riding of Yorkshire, now wholly within the Metropolitan Borough of Doncaster....
, Yorkshire. Four crashed and two had to make forced landings resulting in three crewmen killed and three injured.
The Heyford started to be replaced in 1937, with the arrival in service of Armstrong Whitworth Whitley
Armstrong Whitworth Whitley
The Armstrong Whitworth A.W.38 Whitley was one of three British twin-engine, front line medium bomber types in service with the Royal Air Force at the outbreak of the Second World War...
s and Vickers Wellesley
Vickers Wellesley
The Vickers Wellesley was a British 1930s light bomber built by Vickers-Armstrongs at Brooklands near Weybridge, Surrey, for the Royal Air Force...
s, finally being retired from frontline service in 1939. Some remained flying until 1940 as bombing and gunnery trainers, being declared obsolete in July 1939, with two used as glider tugs until April 1941. At least two examples found experimental use; one for airborne radar
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...
and the other for inflight refuelling, and it is reported that one was still stored as late as 1944.
Variants
Heyford I- Powered by 575 hp (429 kW) Rolls-Royce KestrelRolls-Royce Kestrel|-See also:-Bibliography:* Erfurth, Helmut. Junkers Ju 87 . Bonn, Germany: Bernard & Graefe Verlag, 2004. ISBN 1-85780-186-5....
III engines: 15 built, serial numbers K3489-K3902 (last aircraft built as Mk.II prototype).
Heyford IA
- Engine support changes, power-driven generator, four-blade propellers: 23 built, serial numbers K4021-K4043.
Heyford II
- Powered by 640 hp (480 kW) Kestrel IV engines: 16 built, serial numbers K4863-K4878.
Heyford III
- Supercharged 695 hp (518 kW) Kestrel VI engines: 70 built in two batches, serial numbers K5180-K5199 and K6857-K6906.
For a total of 125 (including the prototype, J9130)
Operators
- Royal Air ForceRoyal Air ForceThe 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...
- No. 7 Squadron RAFNo. 7 Squadron RAFNo. 7 Squadron of the Royal Air Force operates the Boeing Chinook HC.2 from RAF Odiham, Hampshire.-Formation and early years:No. 7 Squadron was formed at Farnborough Airfield on 1 May 1914 as the last squadron of the RFC to be formed before the First World War, but has been disbanded and reformed...
- No. 9 Squadron RAF
- No. 10 Squadron RAFNo. 10 Squadron RAFNo. 10 Squadron was a Royal Air Force squadron. The squadron served in a variety of roles over its 90 year history...
- No. 38 Squadron RAFNo. 38 Squadron RAFNo. 38 Squadron of the Royal Air Force was a bomber squadron formed in 1916 and was disbanded for the last time in 1967.-World War I :...
- No. 58 Squadron RAFNo. 58 Squadron RAFNo. 58 Squadron was a squadron of the Royal Air Force.- History :No. 58 Squadron was first formed at Cramlington, Northumberland, on 8 June 1916 as a squadron of the Royal Flying Corps....
- No. 78 Squadron RAFNo. 78 Squadron RAFNo. 78 Squadron of the Royal Air Force operates the Merlin HC3/3A transport helicopter from RAF Benson.Until December 2007 it was the operator of two Westland Sea King HAR3s from RAF Mount Pleasant, Falkland Islands.-History:No...
- No. 97 Squadron RAFNo. 97 Squadron RAFNo. 97 Squadron, was a Royal Air Force squadron formed on December 1, 1917 at Waddington, Lincolnshire, first as a training unit, until moving to Netheravon in March 1918, and re-equipping with the Handley Page O/400 heavy bomber. The squadron served in France for the remainder of the war...
- No. 99 Squadron RAFNo. 99 Squadron RAFNo. 99 Squadron of the Royal Air Force was a bomber squadron in both first and second world war. At present it operates the Boeing C-17 Globemaster III from RAF Brize Norton, the RAF's air transport hub. The squadron was the first RAF unit to receive the Avro Aldershot, Handley Page Hyderabad,...
- No. 102 Squadron RAFNo. 102 Squadron RAFNo. 102 Squadron was a Royal Air Force night bomber squadron in World War I and a heavy bomber squadron in World War II. After the war it flew briefly as a transport squadron before being reformed a light bomber unit with the Second Tactical Air Force within RAF Germany. Its last existence was as a...
- No. 148 Squadron RAFNo. 148 Squadron RAFNo. 148 Squadron of the Royal Air Force has been part of the RAF since World War I.-History:As No. 148 Squadron it was reformed as a special duties squadron and part of the Balkan Air Force in World War II. It dropped men and materiel behind enemy lines in the occupied countries such as...
- No. 149 Squadron RAFNo. 149 Squadron RAFNo. 149 Squadron RAF was a Royal Air Force Squadron between 1918 and 1956. Formed 1918 in the Royal Flying Corps as a night-bomber unit, it remained in that role for the rest of its existence which spanned three periods between 1918 and 1956.-World War I:...
- No. 166 Squadron RAFNo. 166 Squadron RAFNo. 166 Squadron RAF was a Royal Air Force squadron that formed just after the end of World War I. It was the first and one of only three to be equipped with the Handley Page V/1500 heavy bomber.-History:...
- No. 7 Squadron RAF