Category II Systems Follow-On Tests of the HH-53C Helicopter

Abstract

The HH-53C follow-on tests were conducted to identify the effects of salt water ingestion in regard to engine deterioration, to identify system deficiencies, and the effects of high altitude operation particularly as it affects the auxiliary power plant (APP). The more important findings were as follows: (1) salt water exposure can cause significant engine power deterioration; therefore, engine air particle separators should be used for protection; (2) the second stage hydraulic system can overheat with ambient temperature conditions as low as 50 degrees F; (3) the APP operation was adequate for high altitude conditions; (4) downwind hover caused ingestion of exhaust gases into the oil coolers resulting in oil overtemperature; (5) the aircraft brakes were inadequate at high altitude, high gross weight combinations which required running landings and takeoffs.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1972
Accession Number
AD0900221

Entities

People

  • Clark E. Lovrien Jr.
  • Edwin A. Kowal
  • John L. Barbagallo
  • Sydney E. Gurley

Organizations

  • Air Force Test Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Altitude
  • Auxiliary Power Plants
  • Desert Tests
  • Exhaust Gases
  • Gases
  • Helicopters
  • Landing Gear
  • Oil Coolers
  • Particles
  • Propulsion Systems
  • Salt Water
  • Systems Engineering
  • Tail Rotors
  • Test And Evaluation
  • Test Methods

Readers

  • Aviation Science / Aeronautics.
  • Fire Suppression Systems Design.
  • Petroleum Engineering