Accession Number:

ADA181645

Title:

Fuel Conservation Evaluation of US Army Helicopters. Part 6. Performance Calculator Evaluation

Descriptive Note:

Final rept. for period ending Jan 1981

Corporate Author:

ARMY AVIATION ENGINEERING FLIGHT ACTIVITY EDWARDS AFB CA

Personal Author(s):

Report Date:

1986-07-01

Pagination or Media Count:

205.0

Abstract:

The US Army Aviation Engineering Flight Activity conducted an evaluation of Flight Management Calculator for the UH-1H. The calculator was a Hewlett-Packard HP-41CV. The performance calculator was evaluated for flight planning and in-flight use during 14 mission flights simulating operational conditions. The calculator was much easier to use in-flight that the operators manual data. The calculator was much easier to use in-flight than the operators manual data. The calculator program needs improvement in the areas of pre-flight planning and execution speed. The mission flights demonstrated a 19 percent fuel saving using optimum over normal flight profiles in warm temperatures 15 degrees C above standard. Savings would be greater at colder temperatures because of increasing compressibility effects. Acceptable accuracy for individual aircraft under operational conditions may require a regressive analog model in which individual aircraft data are used to update the program. The performance data base for the UH-1H was expanded with level flight and hover data to thrust coefficients and Mach numbers to the practical limits of aircraft operation. Keywords Compressibility effects, Flight management calculator, Flight planning, Fuel saving, Level flight and Hover data, Regressive analog model, UH-1H.

Subject Categories:

  • Military Aircraft Operations
  • Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE