Napier Javelin

Javelin
Type Piston aero-engine
Manufacturer Napier & Son
First run 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 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

Specifications (Javelin I)

Data from [1]

General characteristics

Components

Performance

See also


Comparable engines
Related lists

References

Notes

  1. 1.0 1.1 Lumsden 2003, p.173.
  2. Lumsden 2003, p.174.

Bibliography

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