YHC-1A FLIGHT EVALUATION

Abstract

This report presents the results of the AFFTC flight evaluation of the YHC-1A helicopter. The YHC-1A is a twin turbine, tandem rotor, tactical transport helicopter powered by two General Electric T58-GE-6 free turbine engines. It represents an advance in the art of helicopter design due to its excellent handling characteristics, positive dynamic stability, and low vibration levels at high speed. The major undesirable system (SAS) for adequate stability and control, inability to utilize full engine power due to transmission torque limits, excessive rpm droop during power application which can lead to the loss of generator output and a dual SAS failure, and slow beep trim rate. It should be pointed out that many of the problem areas existing in the YHC-1A may be eliminated by already programmed design changes for the Vertol 107 Model II which is now in production.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1961
Accession Number
AD0256791

Entities

People

  • Charles C. Crawford
  • Walter J. Hodgson

Organizations

  • Air Force Test Center

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Actuators
  • Air Force
  • Aircrafts
  • Airframes
  • Control Panels
  • Control Systems
  • Electronic Equipment
  • Flight Instruments
  • Fuselages
  • Helicopters
  • Instrument Panels
  • Landing Gear
  • Nose Wheels
  • Sea Level
  • Spars
  • Transducers
  • Turbines

Readers

  • Aerospace Engineering
  • Systems Analysis and Design