In-Flight Rotorcraft Acoustics Program (IRAP) - NASA's aeronautics research will reduce noise to make helicopters and tiltrotors more acceptable to the public.

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In-Flight Rotorcraft Acoustics Program (IRAP)

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	NASA's aeronautics research will reduce noise to make helicopters and tiltrotors more acceptable to the public. The objective of IRAP is to acquire rotorcraft noise data in flight for comparison to wind tunnel data. Sponsored Links:
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Title:	IRAP Introduction
Description:	A key part of NASA's aeronautics research is reducing noise to make helicopters and tiltrotors more acceptable to the public. The objective of the In-Flight Rotorcraft Acoustics Program (IRAP) is to acquire rotorcraft noise data in flight for comparison to wind tunnel data. The type of noise of concern is blade-vortex-interaction, or BVI, noise.
Category:	Wind - Tunnel - Flight - Test - Acoustics - Rotorcraft

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