1!v - Defense Technical Information Center

1 -~~ UNCLASS iIJI'DSE&AUITY CLASSIFICATION OF THIS PAGE (W~en Date Rnt or 1!v41 ~ READ INSTRUCTIONSREOTDCMNAINAE FORE COMPLETING FORM12. G~v= 0. ENT'S CATALOG NUMBER4. TITLE (and Subtitle) S. TYPE OF REPORi r PERIOD OVRDU. S. ARMY TEST AND EVALUATION COMMAND Fnl ,1k VEHICLE _FUEL CONSJMPTION, U iW17"stPRFORMING ORGANIZATION NAME AND ADDRESS i0. PROGRAM ELEMENT, PROJECT, TASKUS AlUTLY ABERDEIEN PROVING GROUND (STEAP-MT-1I' AREA & WORK UNIT NUMBERSABERDEEN PROVING GROUND, MARYLAND 21005 DARQ!C0194 310-61, CONTROLLING OFFICE NAME AND ADDRESSA. ARMY TEST kND EVALUATION COMMAND ( 12. FUMERwm o AGE4'ABERDEEN PROVING GROUND, MARYLAND 21005 16 UME F AE'J 14. MONITORING. AGENCY NAME & ADDRESS(It different Irogn Controlling Office) IS. SECURITY CLASS. (of this report)16I.)))

2 DISTRIBUTION STATEMENT (of this Report)4:c Approved for public release; distribution unlimited. DI17. DISTRi11 UTION STATEMENT (of the abstract entered in Block 20, II dilferent frol, Report) oIt. SUPPLEMENTARY NOTESIt. KEY WORDS (Continu* an rovere* side if neceoseay and Iidentify by block numaber)Fuel ConsumptionF Vehicle, AmphibiousVehicle, Special PurposeVehicle, TrackedVehicle, WheeledE 0. A04rRAcr (cauth. as revse. aide it n~o~oesm mE identity by block "-oi')]'Describes the tests to measure and evaluate wheeled and tracked vehicleC) fuel consumption under both controlled and typical service operatingU coniditions. Applies to land and amphibious vehicles with internalcombustion roo 1473 EOTION Of INOV 4$SSO&SOL9 TE UNCLASSIFIED/ -SECURITY CLASSIFICATION OF TWIkS PAQE (111bn Dots Entered)~sonUS ARMY TEST AND EVALUATION COMMANDTEST OPERATIONS PROCEDUREDRSTE-RP-702-101*Test Operations Procedure 2-2-603 12 February 1980AD FUEL CONSUMPTIONPageParagraph 1.

3 SCOPE .. 12. FACILITIES AND INSTRUMENTATION.. 23. PREPARATION FOR TEST .. 24. TEST CONTROLS .. 35. PERFORMANCE TESTS .. Controlled Tests -TransportationVehicles .. Road-Load Test.. Full-Load Test .. No-Load Test .. Standard Course Test .. Controlled Tests -Engineer TypeVehicles .. Road-Load Test .. Full-Load Test .. No-Load Test .. Work-Function Tests .. Tests Simulating Service Operations .. Usable Fuel Capacity ..86. DATA REDUCTION AND PRESENTATION .. Controlled Tests .. Tests Simulating Service Operations Fuel Consumption Computations ..9 APPENDIX A. RECOMMENDED OPERATING SCHIEDULES ..A-1B. GUIDE FOR PREPARATION OF FIELD CHECKLISTS(FUEL CONS LIPTION TEST -VJIIICLES)..B-11. SCOPE. This TOP describes the tests used to measure and evaluatewheeled and tracked vehicle fuel consumption under both controlled andtypical service operating conditions.

4 Tests are applicable to land andamphibious vehicles with internal combustion or turbine ForZ4T-IS OR A&IDTIC TABU zimnoufoedjutification--*This TOP supersedes TOP 2-2-603, 1 November 1977. DA tribution/Availability CodesApproved for public release; distribution unlimited. Avail and/orDist SpecialS813 A129 TOP 2-2-603 12 February 19802. FACILITIES AND REQUIREMENTA utomotive test courses Level paved course for road-loadand full-load tests; Munson standardfuel course for standard course required for operational testsmay be selected from TOP MAXIMUM PERMISSIBLE ERROR OF MEASUREMENT*Fuel measuring devices kg/hr (lb/hr), L/hr (gal/hr), as(burette, flowmeter, etc.) applicable, to +2% of readingVehicle speed measuring device + km/hr (mph)(calibrated fifth wheel withspeed indicator)Tachometer (engine speed) rpm to of full scale rangeTemperature measuring equip- Fuel temperature to 10C ( 20F)mentMeteorological equipment Ambient air temperature to 10C( 2 F)Relative humidity to +_3%Atmospheric pressure to + in.

5 HgTiming device Fuel consumption time to + secFuel specific gravity of readingmeasuring equipmenL*Values may be assumed to represent 2 standard deviations; thus thestated tolerances should not be excdeded in more than 1 measurementout of PREPARATION FOR Test Inspect and service the vehicle in accordance with TOP 2-2-505to insure that the vehicle is in condition for optimum performance. Payparticular attention to engine adjustments, tire inflaticn, and February 1980 TOP 2-2-603b. Record the following for each vehicle:(1) Vehicle identification.(2) Type, model, and serial number of each significantcomponent (engine, transmission, etc.).(3) Vehicle loads and weight distribution.(4) Fuel specification/type.(5) Fuel specific gravity.(6) Type of fuel measuring Controlled Tests.

6 Instrument the vehicle to measure fuel consumed,'fuel consumption time, engine speed, road speed, and fuel temperature. Theinstrumentation commonly used consists of a calibrated burette installedwith a special tank to hold the fuel, a timer, an engine tachometer, acalibrated fifth wheel with a speed indicator, and a thermocouple to measurefuel temperature in the burette. Another method involves the use of aflowmeter installed in the fuel Tests Simulating Service Operations. No special instrumentationis required to measure fuel consumption during endurance tests or othertests representative of service operating conditions. To measure fuelconsumed during these tests, carefully make all refills of vehicle fueltanks to the same point. Before the tests are started, select a levelthat will assure no loss in fuel through spillage from vehicle movementor from thermal expansion.

7 Determine total distance traveled and totaloperating time from instrumentation used for endurance tests (tachograph). Test Select the tests needed to satisfy the requirements documentfor the specific item to be Prepare a checklist to ensure that all factors essential tothe precision, validity, and efficiency of the test are accomplishedk in an orderly manner. Use Appendix B as a TEST Do not conduct controlled tests during inclement weather. Testcourses must be clear and Record meteorological conditions for all periods pf 2-2-603 12 February 1980c. Perform periodic lubrication and maintenance services throughouttesting in accordance with the applicable lubrication orders and Unless otherwise specified, use referee grade fuels to simulatethe lower quality of fuel that is apt to be available in time of anational emergency (see TOP 2-2-701, Fuels and Lubricants).

8 5. PERFORMANCE Controlled Tests -Transportation Vehicles. Conduct the followingseries of controlled tests for transportation vehicles (including trans-port, tactical support, and combat vehicles) normally used to transportpersonnel, cargo, or weapon systems. Fuel consumption for these vehiclesis determined on the basis of gear range, road speed, engine speed, andload carried. This category also includes some multifunctional vehicles( , amphibious vehicles) requiring separate fuel consumption measure-ments for each Road-Load Load the vehicle with its rated payload or combat Operate the vehicle at constant speeds over a level, pavedtest course (unless otherwise specified) at not less than four equalincrements of speed over the operating range of the vehicle in each Measure fuel consumed for each speed increment.

9 Repeateach measurement a sufficient number of times to assure Data Test Vehicle Vehicle road and engine speeds for each Fuel consumed per test Time to consume Fuel Air temperature, humidity and February 1980 TOP Full-Load Test.* Method. Conduct full-load, full-throttle fuel consumptiontests simultaneously with drawbar pull tests on hard surfaces asdescribed in TOP 2-2-604. Measure fuel consumption at several pointswithin the engine operating range. Repeat each measurement a sufficientnumber of times to assure representative Data Required. Collect and record data as in paragraph No-Load Test (Transmission in Neutral Gear Range). With the vehicle stationary and the transmission in neutral,operate the engine at speeds ranging from rated idle speed to governedengine Measure fuel consumption for each engine speed.

10 Repeateach measurement as necessary to assure Fuel consumed for each engine Fuel Air temperature, humidity and atmospheric Standard Course Operate the test vehicle over APG's standard fuel, consumptioncourse (Figure 1) in each direction of travel using increments of speedthat span the normal service speeds of the vehicle for the test each test at a sustained speed, controlled by the Measure fuel consumption for each speed and coursedirection traveled. Repeat each measurement a sufficient number oftimes to assure representative ,,1 TOP 2-2-603 12 February 1980 Operating DistanceSurface Grade CW CCWmeters (ft) metersGravel Less than 1% 828 (2718) 828 Bituminous Less than 1% 1198 (3930) 1198concrete 1% to 5% 158 up (520) 158 down5% 148 down (487) 148 up15% 61 down (200) 61 upConcrete 30% 45 up (148) 45 downt Total 2439 (8003) 24395% Grade30% GradeD PavedH Gravel 1S(( /Figure 1.))