Astronomy and Space

Flight spare

A flight spare is a copy of a spacecraft or spacecraft part which is held in reserve in case it is needed for the mission. Flight spares are built to the same specifications as the original equipment (the "flight model"), and can be substituted in the case of damage or other problems with the flight model, reducing launch delays. The extra cost of building a flight spare can be justified by the enormous cost of delaying a launch by even a short amount of time.

Also on this shelf

See also

• ▸Globular cluster
• ▸Holmes Miller
• ▸HD 179949

Uncatalogued shelf

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