“Napier Javelin”的意思、由来-开放百科全书

词条

Napier Javelin

释义

Design
Variants
Javelin I Javelin III Javelin IIIA
Applications
Specifications (Javelin I)
See also
References
Notes Bibliography

name=Javelin

image= NapierJavelin.JPG

caption=

}}{{Infobox Aircraft Engine

type=Piston aero-engine

manufacturer=D. Napier & Son

1932}}

major applications=Martin-Baker M.B.1 (one aircraft only)
Percival Mew Gull
}}

The Napier Javelin was a British six-cylinder inline air-cooled engine designed by Frank Halford and built by D. Napier & Son.^[1] First flown in March 1934 in the prototype of the Percival Mew Gull racing aircraft, the engine was also used in the Spartan Arrow biplane and the Percival Gull.^[2]

Design

The six cylinders were arranged inverted and inline. Unlike the similar de Havilland Gipsy Six the poppet valves were operated by a single gear driven overhead camshaft.

Variants

Javelin I

Initial version producing 150 hp.

Javelin III

A longer stroke and increased capacity version of 160 hp.

Javelin IIIA

A Mark III with a starter motor, generator and other improvements for the Martin Baker MB.1.

Applications

Martin-Baker M.B.1
Percival Gull Four Mk.IIA
Percival Mew Gull Mk.I
Spartan Arrow
CoDock LJW-6

Specifications (Javelin I)

{{pistonspecs|
|ref=^[3]
|type=6-cylinder inverted inline air-cooled engine.
|bore=4.5 in (114.3 mm)
|stroke=5.25 in (133.35 mm)
|displacement=501 cu in (8.21 L)
|length=58.5 in (1486 mm)
|diameter=
|width=26 in (660.4 mm)
|height=31.5 in (800 mm)
|weight=410 lb (186 kg)
|valvetrain=Overhead cam poppet-valves
|supercharger=
|turbocharger=
|fuelsystem=Twin updraught carburettors
|fueltype=Petrol
|oilsystem=
|coolingsystem=Air-cooled
|power=150 hp (112 kW) at 2,000 rpm
|specpower=
|compression=5.3:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=0.365 hp/lb
|designer=
|reduction_gear=Direct drive, left hand tractor
|general_other=
|components_other=
|performance_other=
}}

References

Notes

1. ^Lumsden 2003, p.173.
2. ^Lumsden 2003, p.174.
3. ^Lumsden 2003, p.173.

Bibliography

Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. {{ISBN|1-85310-294-6}}.

4 : Aircraft air-cooled inline piston engines|Aircraft piston engines 1930–1939|Inverted aircraft piston engines|Napier aircraft engines

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