Aviation Dictionary

On this page you will find a searchable and comprehensive alphabetical list of aviation terms. You can help us make it the most comprehensive list in the world. If we have missed anything, click on the ‘send us your word’ button to send us your word, acronym or definition and we will consider adding it to our dictionary.

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Constant Speed Propeller (CSU)

Also known as a variable pitch propeller. The pitch of the propeller blade is able to be changed according to the phase of flight, in order to achieve the most efficiency from the propeller. A fine pitch (high rpm) is used during a take-off while a coarse pitch (low rpm) is used during cruise.

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