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)
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) ...
aero engine
An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years many ...
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 Ed ...
. 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
In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement.
The current categorisation is that a supercharger is a form of forced induct ...
fitted.
;Scorpio I
:250 horsepower (186 kW), (230 bhp at 2,250 rpm), increased
bore
Bore or Bores often refer to:
*Boredom
* Drill
Relating to holes
* Boring (manufacturing), a machining process that enlarges a hole
** Bore (engine), the diameter of a cylinder in a piston engine or a steam locomotive
** Bore (wind instruments), ...
(111mm x 120 mm) to give a displacement of 9,477 cc, increased
compression ratio
The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.
A fundamental specification for such engines, it is measured two ways: the stati ...
. Reduction gearing.
;Scorpio II and III
:250 horsepower (186 kW), designed to run on 87
octane
Octane is a hydrocarbon and an alkane with the chemical formula , and the condensed structural formula . Octane has many structural isomers that differ by the amount and location of branching in the carbon chain. One of these isomers, 2,2,4-Tri ...
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
The Airspeed AS.6 Envoy was a twin-engined light transport aircraft designed and produced by the British aircraft manufacturer Airspeed Ltd.
The Envoy originated as a heavier twin-engine derivative of Airspeed's Courier light transport aircra ...
*
Hawker Tomtit
The Hawker Tomtit is a British training biplane from the late 1920s.
Design and development
The Royal Air Force in 1927 required a replacement for their current elementary trainers, the elderly Avro 504Ns. They specified that the power plant sh ...
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
Aries may refer to:
*Aries (astrology), an astrological sign
*Aries (constellation), a constellation of stars in the zodiac
Arts, entertainment and media
* ''Aries'' (album), by Luis Miguel, 1993
* ''Aries'' (EP), by Alice Chater, 2020
* "Aries" ...