Nacelle (wind turbine)

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Interior view of a wind turbine nacelle

A nacelle /nəˈsɛl/ is a cover housing that houses all of the generating components in a wind turbine, including the generator, gearbox, drive train, and brake assembly.^[1]

A notable feature now found on some offshore wind turbines is a large sturdy helicopter-hoisting platform, or helideck, built on top of the nacelle, capable of supporting service personnel and their tools, winched down to the platform from a helicopter hovering above it.^[2]^[3] Wind turbine rotors are stopped, feathered and locked before personnel are dropped down to or picked up from the platforms.^{[citation needed]}

References

↑ "How Wind Turbines Work". US Department of Energy. 30 November 2006.
↑ Eize de Vries. Close up: Alstom Haliade 6MW Prototype, Windpower Monthly, 11 July 2012.
↑ "The Growing Importance of Sustainable Offshore Wind Farms and the Role of Helidecks". HCA. Helideck Certification Agency Ltd. 24 July 2024. Retrieved 4 February 2026.

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[1] "How Wind Turbines Work". US Department of Energy. 30 November 2006.

[2] Eize de Vries. Close up: Alstom Haliade 6MW Prototype, Windpower Monthly, 11 July 2012.

[3] "The Growing Importance of Sustainable Offshore Wind Farms and the Role of Helidecks". HCA. Helideck Certification Agency Ltd. 24 July 2024. Retrieved 4 February 2026.

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