The Alvis Leonides Major was a British air-cooled 14-cylinder
radial
Radial is a geometric term of location which may refer to:
Mathematics and Direction
* Vector (geometric)
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) ...
aero engine developed by
Alvis
Alvis may refer to:
*Alvis Car and Engineering Company, British luxury car and military vehicle manufacturer which later became Alvis plc
* Alvis plc (formerly United Scientific Holdings plc), a defence contractor which acquired Alvis Cars and bec ...
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 and the 751/1 for helicopters at . 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 Westland or Westlands may refer to:
Places
*Westlands, an affluent neighbourhood in the city of Nairobi, Kenya
* Westlands, Staffordshire, a suburban area and ward in Newcastle-under-Lyme
*Westland, a peninsula of the Shetland Mainland near Vaila, ...
Mks. 5, 6, 7 and 8.
[Lumsden 2003, pp.60-61.]
Variants
''Data from:British Piston Engines and their Aircraft.''
;Leonides Major 702/1
: for aeroplanes, also known as A.LE.M.1-1 in Air Ministry
;Leonides Major 751/1
: for helicopters, also known as A.LE.M.1-2
;Leonides Major 755/1
: 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
: 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
The Bristol Type 173 was a British twin-engine, tandem rotor transport helicopter built by the Bristol Aeroplane Company.Jackson 1973, pp. 260–263 It was designed by Raoul Hafner as a civil transport helicopter but evoked interest from the ...
Mk3 – 2x 755/1 (Mk.155) ; 2x 755/2 (Mk.160)
*
Handley Page HPR.5 Herald – four 702/1
*
Westland Whirlwind Westland or Westlands may refer to:
Places
*Westlands, an affluent neighbourhood in the city of Nairobi, Kenya
* Westlands, Staffordshire, a suburban area and ward in Newcastle-under-Lyme
*Westland, a peninsula of the Shetland Mainland near Vaila, ...
1x 755/1 (Mk.155) or 1x 755/2 (Mk.160)
Specifications (Leonides Major 702/1)
See also
References