• Shopping Cart
    There are no items in your cart

SAE AIR1989

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

HELICOPTER EXTERNAL NOISE ESTIMATION

Available format(s)

Hardcopy , PDF

Superseded date

18-12-1992

Superseded by

SAE AIR1989A

Language(s)

English

Published date

01-05-1989

€105.53
Excluding VAT

DocumentType
Standard
Pages
13
PublisherName
SAE International
Status
Superseded
SupersededBy

This method estimates noise for both single and tandem main rotor helicopters except for approach where it applies to single rotor designs only. It does not apply to coaxial rotor designs. Application is limited to helicopters powered by turbo-shaft engines and does not apply to helicopters powered by reciprocating engine, tip jets or other types of power plants. It provides noise information using basic operating and geometric information available in the open literature. To keep the method simple, it generates A-weighted sound levels, precluding the necessity for spectral details. The method prescribes estimates for typical helicopter operations; certain maneuvers may produce noise levels different from those estimated. Estimates are given for the maximum sound levels at 4 ft (1.2 m) height above the ground. For aircraft in forward flight, the estimate is given for an aircraft at an altitude of 500 ft (152 m) on a path directly over the observer. For an aircraft in hover the estimate is given for an aircraft hovering 10 ft above ground level at a distance of 500 ft (152 m) to the side of the observer.

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.