1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and enginee ring sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invit es your written comments and suggestions.Copyright 1998 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.
3、S.A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8510 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROS PACE STANDARDSubmitted for recognition as an American National StandardAS1516I
4、ssued 1978-02Reaffirmed 1998-02H elicopter FUEL E conomy E valuationFOREWORDChanges in this reaffirm are format/editorial only.1. SCOPE:1.1 Purpose:The purpose of this standard is to provide a method of evaluating helicopter fuel economy which accounts for the significant technical variables in heli
5、copter and powerplant design.1.2 Helicopter Operational Modes:This method evaluates helicopter fuel economy for two modes of operation: best range and maximum endurance. The best range mode is important for patrol, inspection, search or cargo delivery missions. The maximum endurance mode is importan
6、t for traffic control, antisubmarine warfare or other loiter-type missions.1.3 Data:The helicopter Pilots Handbook is the only data source required. The Best Range Chart, Maximum Endurance Chart and the specified helicopter weight empty are used.SAE AS1516- 2 -2. FUEL ECONOMY EVALUATION:2.1 Best Ran
7、ge Evaluation:To evaluate Best Range Fuel Economy (BRFE), find the maximum gross weight (GW) at sea level standard day on the Best Range Chart. Calculate useful load by subtracting helicopter weight empty (EW). Multiply the useful load by the maximum range air speed (VBR) as given in the Best Range
8、Chart for the maximum gross weight, sea level standard day. Divide by the fuel flow (FFBR) given for that airspeed. In equation form:BRFE = (GW-EW)VBR/FFBR, useful pound miles per pound of fuel (useful newton meters per kilogram of fuel)2.2 Maximum Endurance Evaluation:To evaluate Maximum Endurance
9、Fuel Economy (MEFE), find the maximum gross weight (GW) at sea level standard day on the Maximum Endurance Chart. Calculate the useful load by subtracting helicopter weight empty (EW). Divide by the fuel flow (FFME) given on the Maximum Endurance Chart for the maximum gross weight, sea level standar
10、d day, at the velocity for maximum endurance. In equation form:MEFE = (GW-EW)/FFME, useful pound hours per pound of fuel (useful newton hours per kilogram offuel)3. METHOD OBJECTIVES:3.1 Availability of Data:All required data are given in every helicopter Pilots Handbook. No mission assumption is re
11、quired.3.2 Quality Assessment:The quality of structural design is accounted for in the useful load term. Engine quality appears in the fuel flow term. Aerodynamic quality controls speed for maximum range and power for maximum endurance. Helicopter size is eliminated as a variable by using the ratio
12、of useful load to fuel flow. The use of two operational modes recognizes two general areas of potential helicopter use.NOTE: In evaluating a helicopter for a given application, use the operational gross weight, altitude and temperature of the specific mission for which the helicopter is being evaluated.PREPARED BY SAE COMMITTEE S-12, HELICOPTER POWERPLANT
