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Engines in nacelles on a Boeing 707.
Components of a horizontal axis wind turbine (gearbox, rotor shaft and brake assembly) being lifted into the nacelle.

The nacelle (pronounced /nəˈsɛl/) is a cover housing (separate from the fuselage) that holds engines, fuel, or equipment on an aircraft or wind turbine. In some cases—most notably the World War II-era P-38 Lightning airplane—an aircraft's cockpit may also be housed in a nacelle. The covering is typically aerodynamically shaped.

In a jet engine the nacelle is composed of the podded engine inlet, fan cowl, thrust reverser, and the exhaust nozzle.

Other uses

  • In a wind turbine, the nacelle refers to the structure that houses all of the generating components, gearbox, drive train, etc.[1]
  • In the Star Trek series it is used to describe the parts of a starship containing the propulsive components of a ship's warp drive.
  • Edward Turner used the term to describe his post-war styling device to tidy the area around the headlamp and instrument panel of his Triumph Speed Twin and Triumph Tiger 100 motorcycles. This styling device was much copied within the British industry thereafter although Czech motorcycle manufacturer CZ were using it beforehand. Indeed, the Royal Enfield Bullet still retains their version, the 'casquette', on their 2009 models. The last Triumphs to sport nacelles were the 1966 models of the 6T Triumph Thunderbird 650, 5TA Triumph Speed Twin 500 and 3TA Triumph Twenty-One 350.

References

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