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1 DEPARTMENT OF COMMERCEN ational Technical Information ServiceAD-A102 584 ENDURANCE TESTING OF TRACKED AND WHEELED Army Tpst and Evaluation CommandAberdeen Proving Ground, Maryland26 Jun 81I. , , , .UNCLASSIFIED ADA0 8 SECURITY CLASSIFICATION OF THIS PAG9 (%4fn Date bFntered) ~REPOT DOUMETATIN PAE IREAD INSTRucTrIONSREPRT BEFORE COMPLETING FORMI UMU12. GOVT ACCESSION ND13. RECIPIENT'S CATALOG 1___W_____--ThST -1 WtkAlONS- 0- .4 EPUO~ RED ..""OMThCOD AND .WHEELED 0. REPOP NIJMSFRS. CONTRACT OR GRANT NUMBER(s)9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT, PROJECT, TASKAREA & WORK UNIT NUMBERSUS ARMY ABERDEEN PROVING GROUND (STEAF-M4T-M)ABERDEEN PROVING CROUND, MARYLAIND 21005 DARCOM-R 310-611. CONTROLLING OFFICE NAME AND ADDRESSUS AMY TST ND EVALUATION4 COMM1 AND (DRSTE-AD-- /ABERDEEN PROVING GROUND, MARYLAND 21005 2614. MONITORING AGENCY NAME & ADDRESS(1I differont from ControllIi$Ofice) 15S SECURITY CLASS.)

2 (of thin report)A UnclassifiedIS&. OECL ASSI FICATION/ DOWN GRADINGSCHEDULEowiAnImiAf16. DISTRIBUTION STATEMENT (of this Report) .Approved for public release; distribution DISTRIBUTION STATEMENT (*I the abstroct entered in Block 20, it different fromt Report)ta. SUPPLEMENTARY NOTES19. KEY WORDS (Continue an reveres, side if necessary and Identity by block number) 0 Dural -ilit~y TachographMidurance V~ehicle, trackedMaintainability Vehicle, wheeledReliability%. A63rRACr (Cenirttau an sd it ncoseey md Idenitiy by block number)Orovictes a mecthod of evaluating the endurance of tracked and wheeled ,Pr ;P cribes mileage or hours of operation over standard test courses, includingR-nd and water, for the various types of vehicles, interspersed with vehiclemission tests . Covers loads, towed loads, speeds, maintenance, and inipcictJionsand usc of the tachographi for recording speed, mileage, and operating time?

3 Applies to all types of vehicles except materials handling NATIONAL TECHNICAL-INFORMATION SERVICE4DD Fj0^R~r, 1473 ED#nioo OF I U-S. DEPAlRYM ITrO UNGLASS1I~Ij CURITY CLASSIFICATION OF THIS PAGE (WIrhen Dais ifn-o .j#US AR1Y TEST AND EVALUATION COMMANDTEST OPERATIONS PROCEDUREDRSTE-RP-702-101 , 26 June 1981*Test Operations Procedure 2-2-506AD TESTING OF TRACKED AND WHEELED VEHICLESPageParagraph 1. SCOPE .. 12. FACILITIES AND INSTRUMENTATION..23. PREPARATION FOR TEST .. Test Planning .. Facilities .. Test Item .. Instrumentation .. Test Personnel .. Safety and Health .. 44. TEST CONTROLS .. 45. ENDURANCE TEST .. Method.. Course .. Towed Loads .. Maintenance and Inspections .. Spectrometric Oil Analysis.. Modifications ..0 .. Special tests ..e ..* . Final Inspection .. Data Required .. 66. DATA REDUCTION AND PRESENTATION .. 7 APPENDIX A.)

4 USE OF THE TACHOGRAPH .. A-1B. TRACKED VEHICLE GROUPS, SCHEDULES, ANDREQUIREMENTS.. B-1C. WHEELED VEHICLE GROUPS, SCHEDULES, ANDREQUIREMENTS.. C-ID. DATA COLLECTION SHEETS ..D-l1. SCOPE. This TOP establishes procedures for conducting endurancetests of military tracked and wheeled vehicles over various standard testcourses for a prescribed number of kilometers, miles, or hours. Bothland and water courses are included. The TOP provides for participationby military test and evaluation personnel in selected phases of develop-ment tests . These phased are intended to produce data on the reliability,availabilit>, maintainability, and human engineering of test vehicles whenoperated and maintained by personnel with skill, training, and experiencelevels that are representative of those of the expected field endurance test is a test which involves extended operation of oneor more test items under cycles designed to simulate, under proving groundconditions, extended field use.

5 The endurance test is the principal meansof producing data for reliability and availability during development tests ,and also is a major source of information on maintainability and human TOP supersedes TOP 2-2-506, 9 September for public release; distribution 2-2-506 26 June 1981A durability test, on the other hand, relates to the mathematicalprobability that a vehicle or a major component thereof will be ableto operate under defined conditions for a specified number of kilom-eters, miles, or hours before requiring major overhaul, replacement,or salvage. The test cycles prescribed in this TOP for endurancetesting may constitute a major portion of a durability test conductedin accordance with TOP 1-2-502. A complete durability evaluation isseldom performed on developmental vehicles since large sample sizes,extensive test mileage, and considerable funding are FACILITIES AND Facilities.

6 Select appropriate test courses to satisfy the testdirective from those described in TOP 1-1-011. Equivalent courses maybe MAXIMUM PERMISSIBLE ERROR OF MEASUREMENT*Recording tachograph Vehicle speed: At km/hr, 3 km/hr;(Described in Appendix A) 48 km/hr, 5 km/hr;97 km/hr, 5 km/hrDistance: -1% to + for travelat 72 km/hrTime: 10 minutes in 24 hoursRpm: 500 -3000 rpm, 50 rpmMotion picture or still Used for recording test anomaliescamera onlyDirect reading emission Contaminant concentrations to withinspectrometer 2 ppm or 15% of reading, whicheveris larger, in the oilMeteorological equipmentTemperature -35* to +500C, humidity 5% to 100% RH, 1%Wind speed 0 to 45 m/s, m/s*Values may be assumed to represent 2 standard deviations; thus thestated tolerances should not be exceeded in more than 1 measurementout of pg -426 June 1981 TOP 2-2-5063.

7 PREPARATION FOR Test Planning. Establish an endurance subtest and a logistic sup-portability subtest. The former defines the courses to cover, themileage, the sequence of operations, and the data to obtain; and pro-vides the data for the latter subtest. (See Paragraph ) Facilities. Identify the test courses used in the test by name,location, and description. Include details such as type of soil, coursecontour, length and degree of grades, course length, description of sur-face roughness, season of year, and wetness of course. If a profilo-meter is available, also present the course description in terms ofpower spectral density as described in TOP Test Initial Inspection and Lubrication. Initially inspect and lubri-cate the test item to ensure that all components function satisfactorily(TOP 2-2-505). The inspection usually is limited to visual and func-tional inspection of the test item but can be expanded to include moredetails when doubt exists concerning the serviceability of the test ve-hicle.

8 Record the model and serial numbers of the vehicle and major com-ponents. Check lubricant types against specifications and record devi-ations. This information is particularly significant for experimentalor foreign vehicles since little is known of the material used for sealsand bearings. Spectrometric analysis of the initial lubricants (TOP2-2-701) may help to identify the type used and provide baseline datafor future spectrometric analysis for contaminants. Perform mainten-ance and service operations to insure that the vehicle is in conditionfor optimum performance. Give particular attention to engine, trans-mission and running Break-In Operation. Operate new vehicles for the appropriatebreak-in mileage as described in TOP 2-2-505. The break-in phase ofthe test program provides an opportunity for driver training and familiar-ization with the test item.

9 The break-in operation also is intended toidentify most "infant mortality" failures from the reliability this operation, use the vehicle and engine speeds recommended bythe manufacturer when they are more restrictive than those shown in TOP2-2-505. When necessary, adjust engine governors for recommended crank-shaft speeds. Operate the vehicle under mild conditions with minimum Test Loads. Unless otherwise specified, load each vehicle withthe cargo or simulated payload it is designed to carry. A dump truckhauls gravel, sand, or crushed stone, whereas a cargo carrier is loadedwith 55-gallon drums, simulated ammunition, or component parts in tanks with dummy ammunition and load personnel carriers withweights to simulate crew. Materials are selected for simulated loadswhich will neither strengthen nor weaken the test vehicle structureartificially. Secure loads adequately to prevent shifting, and instructthe drivers concerning special Instrumentation.

10 Mount recording instrumentation ( , Appendix A)on each test vehicle to record vehicle speed, engine speed, engine hours,and critical temperatures and 2-2-506 26 June Test Personnel. Select an appropriate number of test drivers atrandom from a pool,of qualified drivers based upon the miles to be driven,the number of test vehicles, and the number of experienced drivers avail-able. For test phases employing military operators, select the driversbased on the degree to which they represent the field users of the testvehicle in terms of age, rank or grade, size, driving experience, andspecialized military appropriate personnel in the operation and maintenance of thetest item utilizing the pertinent technical manuals or other appropriatedocuments. Guidance for operator training and familiarization is con-tained in TOP/MTP Safety and Health Evaluation. Before starting an endurance test,conduct those tests necessary to establish a reasonable assurance thatthe test item can be tested with a minimum risk to personnel.