The Wolseley Aries III or A.R.9 was a British nine-cylinder, air-cooled
radial
Radial is a geometric term of location which may refer to:
Mathematics and Direction
* Vector (geometric), a line
* Radius, adjective form of
* Radial distance, a directional coordinate in a polar coordinate system
* Radial set
* A bearing f ...
aero engine that first ran in 1933, it was designed and built by
Wolseley Motors
Wolseley Motors Limited was a British motor vehicle manufacturer founded in early 1901 by the Vickers Armaments in conjunction with Herbert Austin. It initially made a full range, topped by large luxury cars, and dominated the market in the E ...
. Intended for the military
trainer aircraft
A trainer is a class of aircraft designed specifically to facilitate flight training of pilots and aircrews. The use of a dedicated trainer aircraft with additional safety features—such as tandem flight controls, forgiving flight characteristi ...
market few were produced as Wolseley
withdrew from the aero engine market in 1936.
A larger
capacity version was known as the Wolseley Scorpio. Further-enlarged versions, the Leo and Libra, were test run but did not fly.
Variants
;A.R.9 Mk I
:203 horsepower (151 kW).
;A.R.9 Mk II
:205 horsepower (153 kW). Higher permissible rpm version of Mk I.
;A.R.9 Aries Mk III
:225 horsepower (168 kW), low boost
supercharger fitted.
;Scorpio I
:250 horsepower (186 kW), (230 bhp at 2,250 rpm), increased
bore (111mm x 120 mm) to give a displacement of 9,477 cc, increased
compression ratio. Reduction gearing.
;Scorpio II and III
:250 horsepower (186 kW), designed to run on 87
octane fuel with 6.5:1 ratio.
;Leo
:280 horsepower (209 kW), few details, not flown or produced.
;Libra
:390 hp at 6,000 ft.
[''Flight'' 23 April 1936. p441] 725 lbs (329 kg). Tested but not flown or produced.
Applications
*
Airspeed Envoy
*
Hawker Tomtit
Specifications (A.R.9 Aries Mk III)
See also
References
Notes
Bibliography
* Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. .
External links
''Flight'', June 1936 - Wolseley Aries sectioned image
{{Wolseley aeroengines
1930s aircraft piston engines
Aircraft air-cooled radial piston engines
Aries