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Alvis Leonides Major

1930s British piston aircraft engine

1930s British piston aircraft engine

FieldValue
nameLeonides Major
imageAlvis Leonides Major.JPG
engine_typeRadial engine
manufacturerAlvis
national_originUnited Kingdom
major_applicationsWestland Whirlwind
developed_fromAlvis Leonides

The Alvis Leonides Major is a British air-cooled 14-cylinder radial aero engine developed by Alvis from the earlier nine-cylinder Leonides.

Design and development

In 1951 Alvis started development of a 14-cylinder, two row radial of 1,118 cu in (18.3 L) displacement, based on the Leonides. Certification covered the Mk. 702/1 for aeroplanes at 875 hp and the 751/1 for helicopters at 850 hp. The only numerous model of the Major was the Mk. 755/1, a medium supercharged, de-rated, obliquely mounted direct-drive and fan cooled engine fitted to the Westland Whirlwind Mks. 5, 6, 7 and 8.

Variants

Data from:British Piston Engines and their Aircraft. ;Leonides Major 702/1 :850 - for aeroplanes, also known as A.LE.M.1-1 in Air Ministry ;Leonides Major 751/1 :850 hp for helicopters, also known as A.LE.M.1-2 ;Leonides Major 755/1 :780 hp for helicopters in a 35° canted mounting, also known as A.LE.M.1-6 and as Mk.155 in civil aircraft ;Leonides Major 755/2 :780 hp for helicopters in a vertical mounting, also known as A.LE.M.1-6 and as Mk.160 in civil aircraft

Applications

  • Bristol Type 173 Mk3 – 2x 755/1 (Mk.155) 780 hp; 2x 755/2 (Mk.160) 780 hp
  • Handley Page HPR.5 Herald – four 850 hp 702/1
  • Westland Whirlwind 1x 755/1 (Mk.155) or 1x 755/2 (Mk.160) 780 hp

Specifications (Leonides Major 702/1)

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References

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References

  1. (1989). "World encyclopaedia of aero engines". P. Stephens.
  2. Lumsden 2003, pp.60-61.
  3. Lumsden, Alec. (2003). "British Piston Engines and their Aircraft". Airlife Publishing.
  4. (1956). "Jane's all the World's Aircraft 1956–57". Jane's all the World's Aircraft Publishing Co. Ltd..
Info: Wikipedia Source

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aircraft-air-cooled-radial-piston-engines alvis-aircraft-engines 1930s-aircraft-piston-engines
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