IU.S. - Defense Technical Information Center

1 DOCUMENT CONTROL DATA -R & P($ocurity classicatiolln ol-f tile, booy of e&blmC# andl Indlexingl annowfon mustM be otoerea when thel overall report to classllled) I. OIGIATIG ATIVTY Cooerae atho)38. REPORT SECURITY CLASSIFICATION Army Test & Evaluation Command UNCLASSIFIEDA berdeen Proving Ground, Maryland 21005 - REPORT Army Test & Evaluation CommandCommodity Engineering Test Procedure "Tiedown, Cargo, Aircraft"4. DESCRIPTIVE NOTES (2f'p of 9"pet and Inclueive date)FinalS. AU THOR($) (Firer name. aliw/e Initial, last name)}a. REPORT DATE 7a& TOTAL NO. OF PAGES or Rours_ _ __ _ _ OR GRANT NO. 54 ORIGINATOR*S REPORT NUMUER(S)b. PROJECT No. MTP 7-2-100 AKCR 310-6'C.

2 S. OTHER REPORT NOMS) (Afty 8101160N00 00 SMW Ue 8i081duE10F O" TRIIsUTION STATEMENTA pproved for public release; distribution unlimitedIt. SUPmkN'LMENTARY NOTES T12. SPONSORING MILITARY Army Test & Evaluation CommandAberdeen Proving Ground, Maryland 21005S31. AlISTRACT,Desc ibes a method for evaluation of aircraft cargo tiedown deviceperformance characteristics. Provides procedures for test preparation,initial inspection, performance, durability, reliability, maintenance,safety, and human factors. Applicable to conventional tiedown applicable to aircraft and platform tiedown provisions or equipmentsuitability for byNATIONAL TECHNICALINFORMATION SERVICEU S Depotlment of ComnmerceSpringfield VA 22151Fe DO POOM 14,S.

3 1 JAN "4. WHICI IS UNCLASSIFIEDU84urtty ClassiflCatio . LINK m LINK 0 LINK CKEY WORDIICROLE WT ROLE WT ROLE WTGround Support, AviationTiedown' T5 AUNCLASSIFIED8, udy [ lflstiqIwMateriel Test Procedure 7-2-10020 April 1972 Yuma Proving Ground D D CU. S. ARMiY TEST AND EVALUJATION rCOMMODITY ENGINEERING TEST PROCEDURETIEDOWN, CARGO, AIRCRAFT : L1191. OBJECTIVEThe objective of this Materiel Test Procedure is to describe theengineering procedures required to determine the suitability of cargo tie-S)down devices for restraining cargo and equipment during taxiing, flight,normal landing, and emergency landirg conditions. These tiedown devices aredescribed in Appendix 2.]

4 BACKGROUNDD uring Air Delivery Operations, cargo and equipments are subjectedSto strong longitudinal, lateral, and vertical forces as the aircraft maneuvers,"accelerates at takeoff, and decelerates during landing. These forces, depend- e ing on the type of aircraft, may be as high as 9 g's, and act in combinationto move the cargo from its position in the cargo tiedown devices are used to secure cargo and equip-. ment to air delivery platforms or the aircraft floor during air tiedowns consist of attachment hooks, restraining chains (or webbingstraps), a tension mechanism, and a quick release of tiedowns could result in shifting of loads, whichwould affect aircraft performance, and performance of the airdrop such as tumbling upon extraction or damage to loads upon ground im-pact could also occur as a result of faulty tiedowns.

5 Should the tiedownsfail completely, allowing the load to move about the aircraft, the safety ofthe aircraft and personnel would be engineering MTP is concerned with testing aircraft cargo tie-d-fn devices to ensure they can withstand the physical forces received in airdelivery operations and that they perform in accordance with applicable MaterielNeed (MN), Qualitative Materiel Requirements (QMR), Small Development Require-ments (SDR), or the Test Directive (TD).3. REQUIRED Supporting Aircraft and Suitable Air,,. Pacilities* b. Test Cargo Loadsc. Platforms with Tiedown Provisionsd. Loading and Handling Equipmentse. Maintenance and Servicing Toolsf. Inspection Tools (Pull Scales, Calipers, Torque Wrenches, etc.)

6 G. Photograph Equipment (Still and Movie Cameras)h. Rocket Sled Test or Inclined Plane Test Facilityi. Physical Test Laboratory (Universal Tester and Special HydraulicTest Instrumentation (Strain Gages and ..19 IoNe, F ..Approved for public release;-1- .VDisrbution Unlimitod=L~KIf'P 7-2-100 g -I,. -, =.20 April 1972k. Dynamometer .4. REFERENCESA. Army Regulation 70-10, Research and Development, Test andEvaluation During Research and Development of Army Regulation 70-38, Research and Development .ResearchDevelopment, Test and Evaluation of Materiel for ExtremeClimatic Army Regulation 70-39, Research and Development; Criteria forAir Transyort and Airdro f TECOM Regulation 70-23, Ejqu pment Performance Repo TECOM Regulacion , Verification of AMO Regulation 385-12, Verification of Safety of Materielf-om Deveio ment ThrouigTe__stin, _Production and Supiy.))

7 ToDiaosoi~tion,G. Army Materiel Command Pamphlet 706-130, En~geerii Depign Hand-book;,_ DeqsiLjfor Air Transport and Airdrop of MIL--STD-210A, Climatic Extremes for , Loadin Environment and Related Requirements forPlatform Ri~ed Airdrop , Requirements for Tiedown, Suspension and ExtractionProvisions on Military Materiel for MIL-A-8421C, Air Transportability Requirements, General Speci-"fications MIL-A--8591D, Airborne Stores and Associated Suspension Equipment;General Design Criteria MIL-E-5272C (ASG), Environmental Testing, Aeronautical andAssociated Equipment, General Specification MiL-T-25959B, Tiedowns, Cargo, Technical Manual 10-500 Series, Airdrop of Supplies and Technical Manual 55-450-9, Internal Transport Field Manual 55-15, 'ransportation Reference U.

8 S. Air Force 1C-130A-9, Technical Manual, Technical Report ASD-TR-61-579, Performance of and DesignCriteria for Deployable Aerodynamic Decelerators, Dec. MTP 5-1-029, Rocket Sled MTP 6-2-502, Human Factors MTP 7-2-506, Airdrop Systems MWP 7-2-509, Engineering Testing of Airdrop Capability ofMateriel (General).X. HIP 7-2-515, Air Transport, (Suitability of Equipment For).5. SUMMA~ Preparation for Test-2-*i m,/MTP 7-2-10020 April 1972 This section describes the preparation of test facilities, require-ments for safety verification, briefing of test and flight personnel, methodof tiedown of loads, and instrumentation Test ConductThe subtests are designed to determine the operational (air delivery)suitability of tiedown devices under simulated tactical conditions.

9 The tie-downs should perform within the limits of the criteria stated in the appli-cable MN, QMR, SDR, or TD. Those subtests which cross the interface betweenengineering and service tests, , Safety and Human Factors Engineering,should be performed in conjunction with performance subtests, and to the ex-"tent feasible during engineering testing. These data should be sent to theservice test activity for use in planning their Pretest Inspection -The objective of this subtest is to deter-mine if the tiedown device is in good physical condition and operationallyready to be subjected to performance Performance Test -The objective of this subtest is to determineif the tiedown device performs in accordance with design criteria when sub-jected to design rated loads, under simulated tactical Durability and Reliability -The objective of this subtest isto verify that the tiedown device is durable and can withstand air transportconditions for repeated usage.

10 And that the tiedown device's operational reli-ability is within the stated design Maintenance -The objective of this subtest is to verify themaintenance features of the tiedown devices, and determine if any unusualmaintenance problem exists in terms of failures, tools and parts required, orsuitability of instructional Safety -The objective of this subtest is to determine if thetiedown device is safe for air delivery operations, by monitoring the abovesubtests and noting any hazards to personnel, equipment, or the Human Factors Engineering -The objective of this subtest is todetermine if there are any apparent Human Factors problems by monitoring theabove subtests and noting any difficulties during operation, handling, ormaintenance of the tiedown Test DataThis section descr:ibes the data to be collected during inspectionand performance testing.