The nacelle (// nə-SELL) is a housing, separate from the fuselage, that holds engines, fuel, or equipment on an aircraft. In some cases—for instance in the typical "Farman" type "pusher" aircraft, or the World War II-era P-38 Lightning—an aircraft's cockpit may also be housed in a nacelle, which essentially fills the function of a conventional fuselage. The covering is typically aerodynamically shaped.
- Edward Turner used the term to describe his styling device introduced in 1949 to tidy the area around the headlamp and instrument panel of his Triumph Speed Twin, Thunderbird and Tiger 100 motorcycles. This styling device was much copied within the British industry thereafter, although Czech motorcycle manufacturer Česká Zbrojovka Strakonice was using it beforehand. Indeed, the Royal Enfield Bullet still retains its version, the 'casquette', on its current 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.
- Name for the generator and gearbox "shell" on a horizontal axis wind turbine (HAWT).
- In the Star Trek franchise, it is used to describe the parts of a starship containing the propulsive components of a ship's warp drive.
- The Triumph Owners' Motor Cycle Club calls its monthly magazine Nacelle,  after the Triumph styling device designed by Edward Turner.
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- Ilan Kroo, Professor of Aeronautics and Astronautics (April 13, 1999). "Nacelle Design and Sizing". Aircraft Aerodynamics and Design Group at Stanford University. Retrieved April 22, 2011.
- p 107, Davies, Ivor It's A Triumph(Haynes Foulis 1980, 1990 edit.) ISBN 0 85429 182 2
- "Star Trek DB - Nacelle". CBS Entertainment.
- "TOMCC - Nacelle Magazine". Triumph Owners' Motor Cycle Club.
- "Online Etymology Dictionary". Retrieved 5 December 2013.
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