1、“o“A.MSCN/AMIL-STD-814D?Fbmw 997S;ER:EDINGMIL-STD-814C23 February 1993DEPARTMENT OF DEFENSEINTERFACE STANDARDREQUIREMENTS FORTIEDOWN, SUSPENSION AND EXTRACTION PROVISIONSON MILITARY MATERIEL FOR AIRDROP“of-,_#r177 the parachute must not weigh more than2200 pounds,3.4 Desien limit load. The applied f
2、orce, or maximum probable force, times a safety factorthat a suspensio extraction, or tie-down provision, including its connecting strocturaJ members,can withstand when subjected to its most severe airdrop environment. This load must be less thanthe yield load.3.5 Extraction movision. An integral fi
3、tting on the item for attaching the extraction system.3.6 Errtraction svstem. A system used to withdraw airdrop items from aircraft in flight1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MfL-STD-814D3.7 Gross rimed weidt. The airdrop weight plus t
4、he weight of all airdrop rigging. ForLVAD the gross weight= approximately 1600 pounds+ 1.18X airdrop weight.3.8 Item extraction. The extraction system is attached to the airdrop item. The item must beequipped with extraction provisions.3.9 Low velocitv airdrou d.-The dsi hit load shall not be less t
5、h 1.35 times theworking load.APPROXIMATEAIRDROPWEIGHT (LBS) G “G X TOTAL SUSPENDED WEIGHT= WORKING LOADup to 5000 3.505001-21,200 3.0021,201 and above 2.505.2.3 Ultimate strermth. The ultimate strength of each suspension provision shall be a minimumof 1.5 times the working load.5.2.4 Number and loca
6、tion. Four suspension provisions shall be provided for each airdrop item.Suspension twovisions shall be attached in r.rairsso that each Dair shall be suaced at WUSIdktarrcee the horizontalpkme passing through the CG of the airdrop item at a height such that the interference betweensuspension slings
7、and the item is minimized. Each suspension provision of a forward or an aft pairshall be located on the same horizontal plane, at equal distance from the longitudinal axis and on thesame lateral axis (see Figure 5).5Provided by IHSNot for ResaleNo reproduction or networking permitted without license
8、 from IHS-,-,-MI.L-STD-814DThe spacing of the suspension provisions shall be within the foUowing limits:(a) lateral spacing of at least one pair minimum four feet.(b) longitudinal: minimum !4 the length of the airdrop item;maximum 3 X (lateral spacing) or 20 feet, whichever is shorter.Airdrop items
9、smaUerthan the minimum spacing shsUhave the suspension provisions located atthe outer edge of the item. It is desired that the provisions be located as far apart as possible withinthe above limits.The plane of the suspension eye shaUbe in the Iongitudmrd vertical plane of the load or itsaPPro*ate al
10、ignment with the anticipated angle of the sling leg.The use of a spreader bar is not authorized. Parts of the airdrop item in contact with thesuspension slings shaUbe strong enough to withstand the resulting forces and shaUnot have anysharp edges.NOTE: Some special iterns maybe airdropped without su
11、spension provisions by usirrgplatform suspension. For information contact U.S. Army Natick RescarcDevelopment and Engineering Center, Kansas Street, Natic MA 01760-5017.5.3 Extraction provisions. These provisions are applicable if platforms are not available forextraction.5.3.1 Use of existinsrcompo
12、nents. Standard vehicle pintles, suspension provisions, tow barattachments, etc., may be used as extraction provisions if they meet the detailed requirements. Non-welded attachment of the extraction provision to the item is preferred.5.3.2 Low velocitv airdrorI (LVAD). A single airdrop extraction pr
13、ovision is required forairdrop items having an airdrop weight of more than 14,500 pounds.MS 51118 can be used for extracting aUloads with an airdrop weight of up to 34,236pounds, provided attachments meet strength criteria.5.3.2.1 Dimensional requirements. See Figures 6a and 6b.5.3.2.2 Workine load
14、and desireslimitload. The extraction provisions shaUhave the foUowirrgworking load:a71Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IvI.IL-STD-814DTABLE II LVAD provisions workirm loadI Approximate airdrop weight 11(Ibs.) I Working load (lbs.) II 1
15、4,500 -22,372 I 27,05022,373 - 34,236 50,000 II34,237 - 52,270 I 80,466 / Current aircraft capabilities limitthe LVAD gross rigged weight to 42,000 pounds for the C-130aifcr 38,500 pounds for the C-141 aircraft, and 60,000 pounds for the c-5 and C-17 aircratl.LVAD loads weighing up to 42,000 pounds
16、may be airdropped from the C-141 aircraft duringcontingency situations following Air Force approvrd. Except as noted for the C-141 aircra however, a maximum width of 108inches is permitted if there is sufficient space available to securely tie down the item to the airdropplatform. The maximum overal
17、l height of a rigged load must not exceed 101 inches in height for theC-130 aircraft, and C-141 aircrr other ,1. a71a15.- J5”o HORIZONTAL_L-L_- CENTERLINE.:,FF F1. DESIRED ANGLE OF TIEDOWN IS .30” DOWN FROH THE HORIZONTALAND 30” FROM THE LONGITUDINAL CENTERLINE.FIGURE:3 a71T i ecfown provision Limit
18、s of direction OF Loodinq.14Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I.3+?MIL-STD-814D,oInw.VFo“TO 75”IS. G. OF RIGGED LOAD. . FF.- .Y1% -1= y1 3SIDE vfEkIxl =x2,. Y1 =Y2F=o;50x(DESIGN LIHIT LOAD)”F= FORCE THAT EACH PROV 1S1ONM5T w 1THSTANDa71
19、FGURE S.-Suspension provisions, Direction OF OOdinqOnrj locotion:16Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-$a71oIi =. .ML-STD-814DSIDE VIEWEXI,STING VEHICLE TOhBAR5 AND PINTLE5MEET THE Dli-fEN510NAL REUIREMENTS OFIIAY”EE USED IF THEYFIGURE 6B
20、.FIGURE 6ALow.veL,ocitu oirdrop extraction provision dimensionalrequirements For items wi tn on airdrop weiqht betheen14,500 Docnds ond 5,270 goundk.17Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ifll L-STD-814DI 1.812- DIA. MIN.I. . .2.875- tIAX.
21、,I “ ”875- “N”) ;(i.FIGURE 6BLow veLocitq extraction orovision dimensional rerauirement for existinq towbcrs cnd DintLes.16Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-,0 STANDARDIZATION DOCUMENT IMPROVEMENT PROPOSALINSTRUCTIONS1. The preparing ac
22、tivitymust complete blacks 1,2, 3, and 8. n block 1, both the document number andevieion letter should be given.!. The submitter of this form must complete blocks 4, 5, 6, and 7.1. The preparing activity must provide a reply within 30 days from receipt of the form.dOTE: This form may not be used to
23、request copies of documents, nor to request waivera, or clarification ofequirementa on current c.ontmcta. Comments submitted on this form do not constitute or imply authorization towaive any portion of the referenced document(s) or to amend contractual requirements. L-Ty4:4aER 2. 00 CUMENTOATEffYMMD
24、D)97 02 03i. DOCUMSNTTTrLS Requiremen=%z?l%l :%DoR*=.i-T:=#$&*. -_ &#*&x*.F*r Y. -&:$,-+&. w: m.y”+=&+gy:&e%*z*zr, NAME b. TEL5PHONE (IncludeArea Code)(1) Commercial (2) AUTOVONJ.S.Army NatickRD8E Center S08-233-St75 256-5176:. ADDRESS (Include Zip Code) IF YOU DO NOT RECEWE A REPLY wITHIN 45 OAYS,
25、CONTAC7:Commander, U.S. Army NatickRD&E Cenrw DefenseQuality and StandatiizatimOfficeAIEIKSS.CNC-WEF 5203Leesb.rg Pike,Suite 1403,FaJkqChurch. VA 22041.34a6NatJck,MA 01760.5018 Telephone 703) 7S.2340 AUTOVON 2S9-2240OD Form 1426.OCT 89 Previouseditions am obsolete t9S/290.NATICK OPt. ? MAR 96 NATJCKOPI, Jul 91 IS OSSOLETE,Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
