Army Preliminary Evaluation. YAH-1S Helicopter with Modified Flat Plate Canopy Installed.

Abstract

The United States Army Aviation Engineering Flight Activity conducted an Army Preliminary Evaluation of the YAH-1S helicopter to determine the effect of the modified flat plate canopy installation on performance and combined effects of the canopy and the Kaman K-747 rotor on handling qualities. The helicopter was tested from 18 March through 15 June 1977 at Edwards Air Force Base, California. During the test, 28 flights totaling 23.8 productive flight hours were flown. The increase in equivalent flat plate area due to the modified flat plate canopy installation was approximately 3 square feet. Two deficiencies noted during this evaluation were the high intensity of mirror images of both internal and external light sources on the modified flat plate canopy during night flight and the design/location of the night vision goggle switch, which is conductive to inadvertent deactivation of the visual fault warning system. A total of nine shortcomings were noted. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1977
Accession Number
ADA066573

Entities

People

  • Gary L. Skinner
  • James R. Arnold
  • Jerry R. Guin
  • John A. Bishop

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Blades
  • Control Panels
  • Control Systems
  • Control Systems Engineering
  • Data Analysis
  • Engineering
  • Helicopters
  • Hydraulic Accumulators
  • Instrument Panels
  • Light Sources
  • Performance Tests
  • Test And Evaluation
  • Test Methods
  • Warning Systems

Readers

  • Aerospace Engineering
  • Circadian Sleep-Wake Regulation and Chronobiology
  • Electrical Engineering