The Airco DH.1 was an early military biplane of typical "Farman" pattern flown by Britain's Royal Flying Corps during World War I. By the time the powerplant for which it was designed was sufficiently plentiful it was obsolete as an operational aircraft, and apart from a few examples sent to the Middle East it served as a trainer and Home Defence fighter.
Geoffrey de Havilland was one of the pioneering designers at the Royal Aircraft Factory and was partially or wholly responsible for most prewar "Factory" designs. When he left to become chief designer at The Aircraft Manufacturing Company (Airco) in 1914, his first design was strongly reminiscent of the F.E.2, one of the last designs on which he had worked at the Royal Aircraft Factory.
Like the F.E.2, the DH.1 was of pusher configuration, accommodating its pilot and observer in two open tandem cockpits in the nose. The observer's cockpit was stepped down below the pilot's and equipped with a machine gun. The wings were of typical fabric-covered, two-bay, unstaggered, unswept, equal span design, while the stabiliser and rudder were carried on the end of two long, open-framework booms.[1] The type, like the F.E.2b, was designed for the water-cooled Beardmore 120 hp (89 kW) inline engine.[2][N 1] However, all available Beardmore engines were required for F.E.2b and R.E.5 production, so the air-cooled Renault 70 hp (52 kW) V8 engine was installed instead.[2][3]
The prototype was fitted with aerofoils attached to the side of the nacelle which could be rotated through 90 degrees to act as air brakes, an unusual feature for the time, although they were soon removed. It had a fixed conventional landing gear with the mainwheels carried on V-struts, using coil springs and oleos for the suspension.[2][3]
In January 1915 Geoffrey de Havilland piloted the D.H.1 prototype on its first flight at Hendon.[2] Although the Renault engine left it underpowered, performance was still reasonable[4] and the type was ordered into production, with an initial order of 49 being placed.[3] Airco was already occupied with building and designing other aircraft, so DH.1 production was undertaken by Savages Limited of King's Lynn, which had previously manufactured fairground equipment.[N 2][6] These aircraft used a simpler rubber cord suspension, and had a revised cockpit coaming to give a better field of fire for the observer's gun. Production was initially very slow, and only five examples of the type had reached the RFC by the end of 1915.[2]
Later production machines were fitted with the Beardmore engine, as originally intended, as these had become more plentiful. This version was redesignated the DH.1A. Although testing of the DH.1A showed it to be at least as good as the F.E.2b, this was hardly a recommendation, as the F.E. was itself already slated for replacement with more modern tractor types. Nonetheless, a further order for 50 DH.1As was placed with Savages.[7][N 3] By the time of the DH.1's first flight, a single-seat "follow-up" was already being considered; and by June 1915 the first D.H.2 had already made its maiden flight.[8] Designed essentially as a smaller version of the D.H.1, the D.H. 2 was to become of one of the most important British fighters of the period.[6]
Operational history
The DH.1 saw operational service only in the Middle East theatre, where six Beardmore-powered DH.1As arrived in July 1916. These were used by No. 14 Squadron RFC as escorts for their B.E.2reconnaissance aircraft.[6] An Aviatik two-seater was claimed by a 14 Squadron D.H.1A on 2 August 1916 for the only known victory of the type. The last known action by a DH.1 was on 5 March 1917, when one was shot down during a bombing raid on Tel el Sheria.[7] No. 14 Squadron became an R.E.8 unit in November 1917; it seems probable that the last operational DH.1 had gone before that date.
The other DH.1s served in training, with 43 aircraft allotted and Home Defence units in the United Kingdom receiving an additional 24 aircraft,[6] finally being withdrawn from service in 1918.[9]
Variants
DH.1
Prototype and early-production aircraft powered by 70hp Renault engine.
DH.1A
Some 70 production examples powered by a 120hp Beardmore engine
Total production was one prototype and 99 DH.1 and DH.1As, all production examples built by Savages.
^Other sources state that the intended engine was the 100 hp (75 kW) Green.[3]
^It was not uncommon in the First World War for factories that had little background in the aviation industry, but were able to utilize experience in related manufacture, including cabinet making, to undertake aircraft production.[5]
^Although all of the second batch were completed, only 73 DH.1s were issued to RFC units.[7]
^Rumerman, Judy. "The U.S. Aircraft Industry During World War I." 4 June 2007 at the Wayback Machine ''U.S. Centennial of Flight Commission, 2003. Retrieved: 17 October 2011.
^ abcdRickard, J. "Airco D.H.1." History of War, 31 March 2009. Retrieved: 17 October 2011.
Bruce, J.M. The Aeroplanes of the Royal Flying Corps (Military Wing). London: Putnam, 1982. ISBN0-370-30084-X.
Grey, C. G. Jane's All the World's Aircraft 1919 (reprint). New York: Arco Publishing Company, 1969. ISBN0-715-34647-4.
Jackson, A. J. De Havilland Aircraft since 1909. London: Putnam, Third edition, 1987. ISBN0-85177-802-X.
Lamberton, W. M. Reconnaissance & Bomber Aircraft of the 1914–1918 War. Letchworth, UK: Harleyford, 1962.
Mason, Francis K. The British Fighter since 1912. Annapolis, Maryland, USA: Naval Institute Press, 1992. ISBN1-55750-082-7.
Taylor, Michael J. H. Jane's Encyclopedia of Aviation, 1989 edition. London: Studio Editions, 1989, p. 45. ISBN0-517-10316-8.
External links
Wikimedia Commons has media related to Airco DH.1.
February 26, 2023
airco, early, military, biplane, typical, farman, pattern, flown, britain, royal, flying, corps, during, world, time, powerplant, which, designed, sufficiently, plentiful, obsolete, operational, aircraft, apart, from, examples, sent, middle, east, served, trai. The Airco DH 1 was an early military biplane of typical Farman pattern flown by Britain s Royal Flying Corps during World War I By the time the powerplant for which it was designed was sufficiently plentiful it was obsolete as an operational aircraft and apart from a few examples sent to the Middle East it served as a trainer and Home Defence fighter DH 1Prototype DH 1ARole Two seat fighter General purpose aircraftNational origin United KingdomManufacturer AircoDesigner Geoffrey de HavillandFirst flight January 1915Introduction 1915Retired 1918Primary user Royal Flying CorpsNumber built 100 Contents 1 Design and development 2 Operational history 3 Variants 4 Operators 5 Specifications DH 1 6 See also 7 References 8 External linksDesign and development EditGeoffrey de Havilland was one of the pioneering designers at the Royal Aircraft Factory and was partially or wholly responsible for most prewar Factory designs When he left to become chief designer at The Aircraft Manufacturing Company Airco in 1914 his first design was strongly reminiscent of the F E 2 one of the last designs on which he had worked at the Royal Aircraft Factory Like the F E 2 the DH 1 was of pusher configuration accommodating its pilot and observer in two open tandem cockpits in the nose The observer s cockpit was stepped down below the pilot s and equipped with a machine gun The wings were of typical fabric covered two bay unstaggered unswept equal span design while the stabiliser and rudder were carried on the end of two long open framework booms 1 The type like the F E 2b was designed for the water cooled Beardmore 120 hp 89 kW inline engine 2 N 1 However all available Beardmore engines were required for F E 2b and R E 5 production so the air cooled Renault 70 hp 52 kW V8 engine was installed instead 2 3 The prototype was fitted with aerofoils attached to the side of the nacelle which could be rotated through 90 degrees to act as air brakes an unusual feature for the time although they were soon removed It had a fixed conventional landing gear with the mainwheels carried on V struts using coil springs and oleos for the suspension 2 3 In January 1915 Geoffrey de Havilland piloted the D H 1 prototype on its first flight at Hendon 2 Although the Renault engine left it underpowered performance was still reasonable 4 and the type was ordered into production with an initial order of 49 being placed 3 Airco was already occupied with building and designing other aircraft so DH 1 production was undertaken by Savages Limited of King s Lynn which had previously manufactured fairground equipment N 2 6 These aircraft used a simpler rubber cord suspension and had a revised cockpit coaming to give a better field of fire for the observer s gun Production was initially very slow and only five examples of the type had reached the RFC by the end of 1915 2 Later production machines were fitted with the Beardmore engine as originally intended as these had become more plentiful This version was redesignated the DH 1A Although testing of the DH 1A showed it to be at least as good as the F E 2b this was hardly a recommendation as the F E was itself already slated for replacement with more modern tractor types Nonetheless a further order for 50 DH 1As was placed with Savages 7 N 3 By the time of the DH 1 s first flight a single seat follow up was already being considered and by June 1915 the first D H 2 had already made its maiden flight 8 Designed essentially as a smaller version of the D H 1 the D H 2 was to become of one of the most important British fighters of the period 6 Operational history EditThe DH 1 saw operational service only in the Middle East theatre where six Beardmore powered DH 1As arrived in July 1916 These were used by No 14 Squadron RFC as escorts for their B E 2 reconnaissance aircraft 6 An Aviatik two seater was claimed by a 14 Squadron D H 1A on 2 August 1916 for the only known victory of the type The last known action by a DH 1 was on 5 March 1917 when one was shot down during a bombing raid on Tel el Sheria 7 No 14 Squadron became an R E 8 unit in November 1917 it seems probable that the last operational DH 1 had gone before that date The other DH 1s served in training with 43 aircraft allotted and Home Defence units in the United Kingdom receiving an additional 24 aircraft 6 finally being withdrawn from service in 1918 9 Variants EditDH 1 Prototype and early production aircraft powered by 70hp Renault engine DH 1A Some 70 production examples powered by a 120hp Beardmore engineTotal production was one prototype and 99 DH 1 and DH 1As all production examples built by Savages Operators Edit AustraliaAustralian Flying Corps No 1 Squadron AFC operated a single aircraft no 4620 from June to July 1916 10 United KingdomRoyal Flying Corps No 14 Squadron RFCSpecifications DH 1 Edit 3 view Data from De Havilland Aircraft since 1909 11 General characteristicsCrew two pilot and observer Length 28 ft 11 5 8 in 8 830 m Wingspan 41 ft 0 in 12 50 m Height 11 ft 4 in 3 45 m Wing area 426 1 4 sq ft 39 60 m2 Empty weight 1 356 lb 615 kg Gross weight 2 044 lb 927 kg Powerplant 1 Renault Type W air cooled V 8 70 hp 52 kW Propellers wood fixed pitch propellerPerformance Maximum speed 80 mph 130 km h 70 kn Rate of climb 350 ft min 1 8 m s Wing loading 4 7 lb sq ft 23 kg m2 Armament Guns 1 0 303 in 7 7 mm Lewis machine gun for observerSee also EditAircraft of comparable role configuration and era Royal Aircraft Factory F E 2Related lists List of aircraft of the Royal Air ForceReferences EditNotes Other sources state that the intended engine was the 100 hp 75 kW Green 3 It was not uncommon in the First World War for factories that had little background in the aviation industry but were able to utilize experience in related manufacture including cabinet making to undertake aircraft production 5 Although all of the second batch were completed only 73 DH 1s were issued to RFC units 7 Citations Mason 1992 p 39 a b c d e Jackson 1987 p 44 a b c d Bruce 1982 p 39 Mason 1992 p 40 Rumerman Judy The U S Aircraft Industry During World War I Archived 4 June 2007 at the Wayback Machine U S Centennial of Flight Commission 2003 Retrieved 17 October 2011 a b c d Rickard J Airco D H 1 History of War 31 March 2009 Retrieved 17 October 2011 a b c Bruce 1982 p 40 Jackson 1978 p47 Jackson 1987 p 45 Cowan Brendan Lax Mark 29 September 2014 AMC Airco D H 1 adf serials com au Retrieved 22 December 2016 Jackson 1987 p 46 BibliographyBruce J M The Aeroplanes of the Royal Flying Corps Military Wing London Putnam 1982 ISBN 0 370 30084 X Grey C G Jane s All the World s Aircraft 1919 reprint New York Arco Publishing Company 1969 ISBN 0 715 34647 4 Jackson A J De Havilland Aircraft since 1909 London Putnam Third edition 1987 ISBN 0 85177 802 X Lamberton W M Reconnaissance amp Bomber Aircraft of the 1914 1918 War Letchworth UK Harleyford 1962 Mason Francis K The British Fighter since 1912 Annapolis Maryland USA Naval Institute Press 1992 ISBN 1 55750 082 7 Taylor Michael J H Jane s Encyclopedia of Aviation 1989 edition London Studio Editions 1989 p 45 ISBN 0 517 10316 8 External links Edit Wikimedia Commons has media related to Airco DH 1 Airco DH 1 Retrieved from https en wikipedia org w index php title Airco DH 1 amp oldid 1111255195, wikipedia, wiki, book, books, library,
