Fuel Conservation Evaluation of US Army Helicopters. Part 6. Performance Calculator Evaluation
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 operator's manual data. The calculator was much easier to use in-flight than the operator's 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1986
- Accession Number
- ADA181645
Entities
People
- Floyd Dominick
- Roy A. Lockwood