Airworthiness Qualification Criteria for Rotorcraft with External Sling Loads

Abstract

This report presents the results of a study to develop airworthiness requirements for rotorcraft with external sling loads. The report starts with a review of the various phenomena that limit external sling load operations. Specifically discussed are the rotorcraft-load aeroservoelastic stability, load-on handling qualities, effects of automatic flight control system failure, load suspension system failure, and load stability at speed. Based on past experience and treatment of these phenomena, criteria are proposed to form a package for airworthiness qualification. The desired end objective is a set of operational flight envelopes for the rotorcraft with intended loads that can be provided to the user to guide operations in the field. The specific criteria proposed are parts of ADS-33E-PRF; MIL-F-9490D, and MIL-STD-913A all applied in the context of external sling loads. The study was performed for the Directorate of Engineering, U.S. Army Aviation and Missile Command (AMCOM), as part of the contract monitored by the Aerothermodynamics Directorate, U.S. Army AMCOM.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2002
Accession Number
ADA408333

Entities

People

  • David L. Key

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Aerodynamic Characteristics
  • Aircrafts
  • Airframes
  • Army Aviation
  • Closed Loop Systems
  • Contracts
  • Control Systems
  • Flight Control Systems
  • Flight Crews
  • Flight Testing
  • Ratings
  • Reliability
  • Rotary Wing Aircraft
  • Safety
  • Standards
  • Test And Evaluation

Fields of Study

  • Engineering

Readers

  • Aerospace Engineering
  • Systems Analysis and Design