Weslake A80

Last updated
Weslake
Type Opposed-piston two-stroke diesel aero engine
National origin UK
ManufacturerWeslake

The Weslake A80 is a liquid cooled, two-stroke, opposed piston, 1332cc diesel aircraft engine, produced by Weslake. [1] [2]

Radiator (engine cooling) heat-exchanging component of liquid cooled engines

Radiators are heat exchangers used for cooling internal combustion engines, mainly in automobiles but also in piston-engined aircraft, railway locomotives, motorcycles, stationary generating plant or any similar use of such an engine.

Opposed-piston engine reciprocating internal combustion engine configuration

An opposed-piston engine is a reciprocating internal combustion engine in which each cylinder has a piston at both ends, and no cylinder head.

Diesel engine Internal combustion engine with quality rotational frequency governing, internal mixture formation, lean air-fuel-ratio, diffusion flame and compression ignition

The Diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel, which is injected into the combustion chamber, is caused by the elevated temperature of the air in the cylinder due to the mechanical compression. Diesel engines work by compressing only the air. This increases the air temperature inside the cylinder to such a high degree that atomised Diesel fuel injected into the combustion chamber ignites spontaneously. With the fuel being injected into the air just before combustion, the dispersion of the fuel is uneven; this is called a heterogenous air-fuel mixture. The process of mixing air and fuel happens almost entirely during combustion, the oxygen diffuses into the flame, which means that the Diesel engine operates with a diffusion flame. The torque a Diesel engine produces is controlled by manipulating the air ratio; this means, that instead of throttling the intake air, the Diesel engine relies on altering the amount of fuel that is injected, and the air ratio is usually high.

Contents

Design and development

This opposed piston aero-engine appears superficially similar to a true flat-four "boxer" engine, but is actually significantly different. It has two ported cylinders with a crankshaft at each end and four pistons in total. This engine is similar to the prototype Diesel Air engine, which was built for Diesel Air [3] by Weslake, but which has to date failed to reach volume production.

Each crankshaft is linked by an idler gear to a centre shaft. [4]

Applications

Specifications

Reference: Coulson [5]

General characteristics

  • Type: opposed piston
  • Bore: 72mm
  • Stroke: 77 mm
  • Displacement: 1332 cm3
  • Length: 505mm
  • Width: 614mm
  • Height: 485mm
  • Dry weight: 71.5 kg (dry)

Components

Valvetrain mechanical system that controls operation of the valves in an internal combustion engine

A valvetrain or valve train is a mechanical system that controls operation of the valves in an internal combustion engine, whereby a sequence of components transmits motion throughout the assembly.

Fuel injection

Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector.

Performance

Revolutions per minute is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.

Power-to-weight ratio is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of actual performance of any engine or power source. It is also used as a measurement of performance of a vehicle as a whole, with the engine's power output being divided by the weight of the vehicle, to give a metric that is independent of the vehicle's size. Power-to-weight is often quoted by manufacturers at the peak value, but the actual value may vary in use and variations will affect performance.

See also

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References

  1. ↑ Weslake factsheet August 2104
  2. ↑ Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, pages 262-263. Flying Pages Europe SARL, 2015. ISSN   1368-485X
  3. ↑ "Diesel Air Limited". dair.co.uk. Retrieved 3 September 2014.
  4. ↑ "Weslake - Pully/Ring Gear Carrier". weslake.eu. Retrieved 3 September 2014.
  5. ↑ Thomas Coulson. "Weslake.eu". weslake.eu. Retrieved 1 September 2014.
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