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Lioré et Olivier LeO 12

The Lioré et Olivier LeO 12 was a night bomber built in France in 1924.[1]

LeO 12
Role Night bomber
National origin France
Manufacturer Lioré et Olivier
First flight June 1924
Number built 4

Design and development edit

The Lioré et Olivier LeO 12 was a large biplane of conventional design, with three-bay equal-span wings and twin engines mounted in nacelles on struts in the interplane gap. The independent main undercarriage units were faired in long, trouser-style spats. Construction throughout was mainly duralumin, skinned in fabric. The pilot's cockpit was open, and there was a second cockpit amidships for a gunner.[1]

Operational history edit

When the French Air Force was not interested in the type, three of the four examples built were modified for other roles. One became a 12-seat passenger transport that Lioré et Olivier operated on an airline subsidiary, another had its cockpit and gunner's hatch enclosed and was used by the French air ministry as an experimental testbed, and the third received new engines and better defensive armament and was again demonstrated to the army.[2] The reception to this type, the LeO 122, was barely more enthusiastic, but Lioré et Olivier used it as the basis for further development work that would result in the successful LeO 20.[1]

Variants edit

  • LeO 12 - prototype night bomber version with Lorraine-Dietrich 12Db engines (4 built)
    • LeO 12 BN.2
    • LeO 12 BN.3
  • LeO 121 - 12-seat airliner (1 converted from LeO 12)
  • LeO 122 - improved night bomber prototype with Gnome-Rhône 9Ab engines and extended "balcony" on nose for second gunner (1 converted from LeO 12)
  • LeO 123 - testbed with enclosed cockpits (1 converted from LeO 12)


Specifications (LeO 12) edit

 
Liore et Olivier LeO 12 3-view drawing from Les Ailes January 21, 1926

Data from https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930084588.pdf

General characteristics

  • Crew: Two, pilot and gunner
  • Length: 12.6 m (41 ft 4 in)
  • Wingspan: 22.2 m (72 ft 10 in)
  • Height: 4.26 m (14 ft 0 in)
  • Wing area: 105 m2 (1,130.21 sq ft)
  • Empty weight: 2,650 kg (5,842 lb)
  • Gross weight: 4,600 kg (10,141 lb)
  • Powerplant: 2 × Lorraine-Dietrich 12Db , 300 kW (400 hp) each

Performance

  • Maximum speed: 204 km/h (126.75 mph, 110.14 kn)
  • Range: 598.6 km (372 mi, 323 nmi)
  • Service ceiling: 6,004 m (19,700 ft)

References edit

Notes edit

  1. ^ a b c Taylor 1989, p. 578.
  2. ^ Taylor and Alexander 1969, pp. 98-99.

Bibliography edit

  • Hartmann, Gérard. Les Avions Lioré Et Olivier. Boulogne-Billancourt, France: ETAI. 2002. ISBN 2-7268-8607-8 (in French)
  • Taylor, John W. R. and Jean Alexander. Combat Aircraft of the World. New York: G.P. Putnam's Sons, 1969. ISBN 0-71810-564-8.
  • Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions, 1989. ISBN 0-517-69186-8.

External links edit

  • aviafrance.com
  • Уголок неба

lioré, olivier, night, bomber, built, france, 1924, 12role, night, bombernational, origin, francemanufacturer, lioré, olivierfirst, flight, june, 1924number, built, contents, design, development, operational, history, variants, specifications, references, note. The Liore et Olivier LeO 12 was a night bomber built in France in 1924 1 LeO 12Role Night bomberNational origin FranceManufacturer Liore et OlivierFirst flight June 1924Number built 4 Contents 1 Design and development 2 Operational history 3 Variants 4 Specifications LeO 12 5 References 5 1 Notes 5 2 Bibliography 6 External linksDesign and development editThe Liore et Olivier LeO 12 was a large biplane of conventional design with three bay equal span wings and twin engines mounted in nacelles on struts in the interplane gap The independent main undercarriage units were faired in long trouser style spats Construction throughout was mainly duralumin skinned in fabric The pilot s cockpit was open and there was a second cockpit amidships for a gunner 1 Operational history editWhen the French Air Force was not interested in the type three of the four examples built were modified for other roles One became a 12 seat passenger transport that Liore et Olivier operated on an airline subsidiary another had its cockpit and gunner s hatch enclosed and was used by the French air ministry as an experimental testbed and the third received new engines and better defensive armament and was again demonstrated to the army 2 The reception to this type the LeO 122 was barely more enthusiastic but Liore et Olivier used it as the basis for further development work that would result in the successful LeO 20 1 Variants editLeO 12 prototype night bomber version with Lorraine Dietrich 12Db engines 4 built LeO 12 BN 2 LeO 12 BN 3 LeO 121 12 seat airliner 1 converted from LeO 12 LeO 122 improved night bomber prototype with Gnome Rhone 9Ab engines and extended balcony on nose for second gunner 1 converted from LeO 12 LeO 123 testbed with enclosed cockpits 1 converted from LeO 12 Specifications LeO 12 edit nbsp Liore et Olivier LeO 12 3 view drawing from Les Ailes January 21 1926Data from https ntrs nasa gov archive nasa casi ntrs nasa gov 19930084588 pdfGeneral characteristicsCrew Two pilot and gunner Length 12 6 m 41 ft 4 in Wingspan 22 2 m 72 ft 10 in Height 4 26 m 14 ft 0 in Wing area 105 m2 1 130 21 sq ft Empty weight 2 650 kg 5 842 lb Gross weight 4 600 kg 10 141 lb Powerplant 2 Lorraine Dietrich 12Db 300 kW 400 hp eachPerformance Maximum speed 204 km h 126 75 mph 110 14 kn Range 598 6 km 372 mi 323 nmi Service ceiling 6 004 m 19 700 ft References editNotes edit a b c Taylor 1989 p 578 Taylor and Alexander 1969 pp 98 99 Bibliography edit Hartmann Gerard Les Avions Liore Et Olivier Boulogne Billancourt France ETAI 2002 ISBN 2 7268 8607 8 in French Taylor John W R and Jean Alexander Combat Aircraft of the World New York G P Putnam s Sons 1969 ISBN 0 71810 564 8 Taylor Michael J H Jane s Encyclopedia of Aviation London Studio Editions 1989 ISBN 0 517 69186 8 External links edit nbsp Wikimedia Commons has media related to Liore et Olivier LeO 12 aviafrance com Ugolok neba Retrieved from https en wikipedia org w index php title Liore et Olivier LeO 12 amp oldid 1184437879, wikipedia, wiki, book, books, library,

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