1、INCH-POUNDMILITARY SPECIFICATIONREEL, SHOULDER HARNESS, INERTIA LOCKThis specification is approved for use by all Departments and Agencies of the Department of Defense.1. SCOPE1.1 Scope. This specification establishes the dynamic and static performance criteria and testing requirementsfor 6 types of
2、 shoulder harness inertia reels and subassemblies thereof, for military aircraft.1.2 Classification. Inertia reels shall be of the following types and they are designated as flight criticalcomponents/subassemblies (see 6.4.7):MA-1 Unidirectional (see 6.4.12 and Figure 1)MA-2 Multidirectional (see 6.
3、4.10 and Figure 2)MA-6 Multidirectional (see 6.4.10 and Figure 3)MA-8 Multidirectional (see 6.4.10 and Figure 3)MA-14 Omnidirectional (see 6.4.11 and Figure 3)MA- I 6 Omnidirectional (see 6.4.11 and Figure 3)2. APPLICABLE DOCUMENTS2.1 Government documents.2.1.1 Specifications. standards and handbook
4、s. The following specifications, standards, and handbooks forma part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documentsshall be those listed in the issue of the Departmeent of Defense Index of Specifications and Standards (DODISS)and suppl
5、ement thereto, cited in the solicitation.SPECIFICATIONSFEDERALPPP-B-566 Boxes, Folding, PaperboardPPP-B-601 Boxes. Wood, Cleated-PlywoodPPP-B-636 Bows. Shipping, FiberboardPPP-B-676 Boxes, Set-UpBeneficial comments (recommendations, additions, deletions) and any pertinent data that may be of use ini
6、mproving this document should be addressed to: The Resources and Logistics Services, SA-ALC/TILDM,Kelly AFB TX 78241-5000 by using the self-addressed Standardization Document Improvement Proposal (DDForm 1426) appearing at the end of this document or by letter.AMSC N/A FSC 1680DISTRIBUTION STATEMENT
7、 A. Approved for public release; distribution is unlimited.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-8236FMILITARYMIL-P-116MIL-S-5002MIL-F-7179MIL-S-7742MIL-C-7958MIL-A-8625MIL-Q-9858MIL-F-18264MIL-W-25361MIL-I-45208MIL-S-58095 MIL-S-8177
8、1MIL-W-83420MIL-C-83488STANDARDSFEDERAL FED-STD-595MILITARYMIL-STD-129MIL-STD-130MIL-STD-810MIL-STD-831MIL-STD-889MIL-STD-970HANDBOOKSMILITARYMIL-HDBK-132MTL-HDBK-275Preservation, Methods ofSurface Treatments and Inorganic Coatings For Metal Surfaces of WeaponsSystemsFinishes, Coatings, and Sealants
9、 For The Protection of Aerospace WeaponsSystemsScrew Threads, Standard, Optimum Selected Series: General Specification ForControls, Push-Pull Flexible and RigidAnodic Coatings, For Aluminum And Aluminum A11OYSQuality Program RequirementsFinishes: Organic, Weapons System, Application And Control ofWe
10、bbing. Textile, Polyester, Low ElongationInspection System RequirementsSeat System: Crash-Resistant Non-Ejection, Aircrew, General SpecificationForSeat System; Aircrew Crash Resistant, General Specification ForWire Rope, Flexible, For Aircraft ControlCoating. Aluminum. Ion Vapor DepositedColors Used
11、 in Government ProcurementMarking For Shipment And Storageidentification Marking of U.S. Military PropertyEnvironmental Test Methods And Engineering GuidelinesReports Test, Preparation ofDissimilar MetalsStandards Arid Specifications. Order of Preference For The Selection ofProtective Finishes For M
12、etal And Wood SurfacesGuide for Selection of Lubricant Fluids and Compounds for Use in FlightVehicles and Components(Unless otherwise indicated, copies of federal and military specifications, standards and handbooks areavailable from the Standardization Documents Order Desk, Building 4D, 700 Robbins
13、 Ave, Philadelphia, PA19111-5094)2.2 Non-Government publication. The following document forms a part of this document to the extentspecified herein. Unless otherwise specified. the issues of the documents which are DOD adopted are those listedin the issue of the DODISS cited in the solicitation. Unl
14、ess othewise specified. the issues of documents not listedin the DODISS are the issues of (he documents cited in the solicitation (see 6.2).2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-8236FAMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)A
15、STM D-3951-90 Packaging, Commercial(Application for copies of ASTM publications should be addressed to the American Society for Testing andMaterials, 1916 Race Street Philadelphia PA 19103.)SOCIETY OF AUTOMOTIVE ENGINEERS, INC.(AEROSPACE MATERIAL SPECIFICATIONS)1979 SAE Handbook Part 2, Recommended
16、Practice, Section J21lb, Instrumentation for ImpactTest(Application for copies should be addressed (o the Society of Automotive Engineers, Inc., 400Commonwealth Drive, Warrendale, Pa., 15096.)(Non-Government standards and other publications are normally available from the organizations that prepareo
17、r distribute the documents. These documents also may be available in or through libraries or other informationalservices.2.3 Order of precedence. In the event of a conflict between the text of this specification and the referencescited herein (except for related associated detail or MS standards), t
18、he text of this specification takes precedence.Nothing in this specification. however, supersedes applicable laws and regulations unless a specific exemption hasbeen obtained.3. REQUIREMENTS3.1 Oualification. The inertia reels and their subassemblies furnished under this specification shall beproduc
19、ts which are authorized by the qualifying activity for listing on the applicable Qualified Products List (QPL)at the time of award of contract (see 4.2.1. and 6.5).3.2. Specific aircraft applications. The inertia reel shall be installed in the applicable aircraft seat system andshall be compatible w
20、ith seat inferface and seat performance requirements (see 6.1.1 and 6.1.1.1).3.3 Materials. The inertia reel materials shall withstand prolonged exposure to temperature extremes.humidity, fungus, sand, dust, salt fog (including effects with stack gases), acceleration, vibration, or other aspectsof t
21、he environment without degradation. Materials used shall not be nutrients for fungi.3.3.1 Metals. Metals utilized shall be corrosion-resistant or suitably treated to withstand the environmentalconditions specified in 3.3. Unless suitably protected against electrolytic corrosion, dissimilar metals, a
22、s defined inMIL-STD-889, shall not be used in intimate contact with each other (see 4.3.1).3.3.1.1 Corrosion protection. Corrosion protection practices employed in manufacturing the inertia reel andits components shall be in accordance with MIL-STD-889 for dissimilar metals and with MIL-F-7179 (exte
23、riorsurfaces) for parts and surfaces of assemblies (see 4.3.1.1).3.3.1.2 Finishes. Protective coatings and finishes shall not crack. chip. or scale during normal service use orwhen subjected to the general service environmental conditions specified (see 4.5.). Surface treatments andinorganic coating
24、s for metal surfaces shall be applied in accordance with MIL-S-5002. Application and control oforganic finishes shall be in accordance with MIL-F-18264 and MIL-HDBK-132. Unless otherwise specified, allexterior surfaces of the inertia reel shall be lusterless black # 37038 in accordance with FED-STD-
25、595.3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-8236F3.3.1.3 Plating Steel parts in contact with aluminum or aluminum alloy shall be coated with a1uminum byion vapor deposition in accordance with MIL-C-83488, Type II. Class I (see 4.3.1.3)
26、.3.3.1.4 Anodizing. All aluminum and aluminum alloy parts not subject to severe wear shall be anodizdwhere applicable, in accordance with Type II of MIL-A-8625. All aluminum and aluminum alloy parts subject tosevere wear shall be anodized in accordance with Type II of MIL-A-8625. Severe wear is defi
27、ned as wear whichresults in inertia reel performance degradation below performance levels specified (see 4.3.1.4).3.3.2 Screw threads. Screw threads shall conform to MIL-S-7742. All internal or external parts that arethreaded shall be positively locked (see 4.3.2).3.4 Design and construction. The in
28、ertia reel shall withstand the strains, jars, vibrations, and other conditionsincident to shipping, storage, installation, and the operational service environment. Pivots, bearings, and gearsshall not bind, shake, or degrade inertia reel performance during normal operational use. Maintenance assembl
29、yand disassembly for replacement of the webbing or cable and the control handle and cable assembly shall notrequire special tools.3.4.1 Standard Parts. AN or MS standard parts shall be used whenever they are suitable for the purpose andshall be identified on the drawings by their part numbers (see 4
30、.4.1). Government Qualifying Activity approval ofthe use of non-standard parts shall be required prior to their use. Electrical parts, if used, shall be MilitarySpecification components.3.4.2 Parts interchangeability. AH parts having the same manufacturers part number shall be directly andcompletely
31、 interchangeable with respect to installation and performance (see 4.4.2).3.4.3 Subassemblies. The MA- 1 and MA-2 type inertia reel assemblies shall consist of. and be available as, 3subassemblies:a. Inertia reel housing with its internal mechanism(s), sensing device(s), and integrated shoulder harn
32、esscable.b. Manual control handle. with attaching hardware.c. Manual control cable.The MA-6, MA-8, MA-14, and MA-16 type inertia reel assemblies shall consist of, and be available as, 4subassemblies:a.b.c.d.Inertia reel housing with its internal mechanism(s), sensing device(s), and integrated cable
33、or means foraccepting and accommodating a webbing lead-in strap or integrated restraint harness lead-in strap,including webbing keeperWebbing lead-in strap with harness attachment, when applicable.Manual control handle, with attaching hardware.Manual control cable.Figure 4 depicts representative MA-
34、6, MA-8, MA-14, and MA-16 type inertia reels.3.4.3.1 Inertia reel housing subassembly. The inertia reel housing subassembly, which encloses the cabledrum or webbing spool, shall have provisions for calibration of the internal mechanism. Access for calibrationshall be gained using common hand tools i
35、n a maximum of 5 minutes (see 4.4.3.1).4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-8236F3.4.3.1.1 Inertia reel locking mechanism actuation.3.4.3.1.1.1 Inertia reel locking mechanism actuation (MA-1 type inertia reel). The MA-1 type inertia
36、 reellock/unlock mechanism shall be fully and completely activated by a throw (stroke) of 1.21 0.03 inches deliveredby the moveable clement of the MA-1 manual control cable subassembly (see 4.4.3.1.1).3.4.3.1.1.2 inertia reel locking mechanism actuation (MA-2 typeinertia reel). The MA-2 type inertia
37、 reellock/unlock mechanism shall be fully and completely activated by a throw (stroke) of 0.38 0.03 inches deliveredby the moveable element of the MA-2 manual control cable subassembly (see 4.4.3.1.1.2).3.4.3.1.1.3 Inertia reel locking mechanism actuation (MA-6, MA-8, MA-14, and MA-16 typeinertia re
38、els).The MA-6, MA-8, MA-14, and MA-16 type inertia reel lock/unlock mechanisms shall be fully and completelyactivated by a throw (stroke) of 0.68 inches delivered by the moveable element of the MA-6, MA-8, MA-14,and MA-16 type manual control cable subassemblies (see 4.4.3.1.1.3).3.4.3.1.2 Inertia re
39、el housing subassembly intercchangeability. The inertia reel housing subassembly shall becapable of being mated with all QPL webbing lead-in strap subassemblies, restraint harness assemblies, all QPLmanual control cable subassemblies and all QPL manual control handle subassemblies without performanc
40、edegradation below the performance levels specified (see 3.5).3.4.3.1.3 Inertia reel housing subassembly shoulder harness attachment cable (MA-1 and MA-2 type inertiareels). For inertia reels of these types. the shoulder harness attachment cable shall conform to MIL-W-83420, andshall be securely att
41、ached to the cable drum. A swaged-type clevis end fitting for the MA-1 type inertia red, asdepicted in Figure 5, and for the MA-2 type inertia reel, as depicted in Figure 6, shall be provided for attachmentto the harness. The cable shall be protected at the point of attachment to prevent damage by s
42、nagging or rubbing.Dimension “A” on Figures 1 and 2 shall be as specified in acquisition requirements (see 6.2.1(c). On all inertiareels where the “A” dimension is more than 0.0 inch. a permanent stop shall prevent the inertia reel fromretracting more than 18 inches of cable from the fully extended
43、position. A durable dust cover and guide shall beprovided for the shoulder harness cable (see 4.4.3.1.3).3.4.3.1.4 Inertia reel drum/spool capacity. The MA-1 and MA-2 type inertia reel drums shall be capable ofaccepting a minimum of 18 inches of shoulder harness attachment cable within the inertia r
44、eel housing withoutbinding. The MA-6 and MA-8 type inertia reel spools shall be capable of accepting a minimum of 18 inches ofstandard shoulder harness attachment webbing within the inertia reel housing without binding. The MA-14 andMA-16 type inertia reel spools shall be capable of accepting a mini
45、mum of 24 inches of standard shoulder harnessattachment webbing within the inertia reel housing without binding (see 4.4.3.1.4).3.4.3.1.5 Inertia reel housing subassembly adjustability. For MA-6, MA-8, MA-14, and MA-16 type inertiareds, the inertia reel housing subassembly control head shall be capa
46、ble of being rotated within the planeperpendicular to the take-up spool axis of rotation with a minimum of 12 uniformly spaced adjustments with oneon each cardinal point without degrading the capability of the manual cent.ro! handle/manual control cablesubassemblies to actuate the inertia reel lock.
47、 Additiional adjustments need not be uniformly spaced (see 4.4.3.1.5).3.4.3.2 Shoulder harness attachment webbing subassembly.3.4.3.2.1 Shoulder harness attachment webbing (MA-6, MA-8, MA-14, and MA-16 type inertia reels). Forinertia reels of these types, the shoulder harness attachment webbing shal
48、l consist of either a webbing lead-in strapsubassembly, as detailed herein, or an integrated restraint harness assembly lead-in strap. The integrated restraintharness assembly shall comply with the applicable seat system/restraint system requirements and drawings. Forthe webbing lead-in strap subass
49、embly. the webbing shall conform to MIL-W-25361, Type IV, except that thewidth shall be 1.75 0.0625 inches. the thickness shall be 0.055 to 0.075 inches. and the minimum breakingstrength shall be 8.000 pounds. The webbing lead-in strap shall have a fitting, as depicted in Figure 7, forattachment to the harness. The webbing shall be securely attached to the spool with an appropriate end fitting to5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
