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Page Title:
Inertia reel locking mechanism actuation |
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|  MIL-R-8236F
3.4.3.1.1 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 reel
lock/unlock mechanism shall be fully and completely activated by a throw (stroke) of 1.21 0.03 inches delivered
by 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 reel
lock/unlock mechanism shall be fully and completely activated by a throw (stroke) of 0.38 0.03 inches delivered
by 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 reels).
The MA-6, MA-8, MA-14, and MA-16 type inertia reel lock/unlock mechanisms shall be fully and completely
inches delivered by the moveable element of the MA-6, MA-8, MA-14,
activated by a throw (stroke) of 0.68
and MA-16 type manual control cable subassemblies (see 4.4.3.1.1.3).
3.4.3.1.2 Inertia reel housing subassembly intercchangeability. The inertia reel housing subassembly shall be
capable of being mated with all QPL webbing lead-in strap subassemblies, restraint harness assemblies, all QPL
manual control cable subassemblies and all QPL manual control handle subassemblies without performance
degradation 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 inertia
reels). For inertia reels of these types. the shoulder harness attachment cable shall conform to MIL-W-83420, and
shall be securely attached to the cable drum. A swaged-type clevis end fitting for the MA-1 type inertia red, as
depicted in Figure 5, and for the MA-2 type inertia reel, as depicted in Figure 6, shall be provided for attachment
to the harness. The cable shall be protected at the point of attachment to prevent damage by snagging or rubbing.
Dimension "A" on Figures 1 and 2 shall be as specified in acquisition requirements (see 6.2.1(c)). On all inertia
reels where the "A" dimension is more than 0.0 inch. a permanent stop shall prevent the inertia reel from
retracting more than 18 inches of cable from the fully extended position. A durable dust cover and guide shall be
provided 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 of
accepting a minimum of 18 inches of shoulder harness attachment cable within the inertia reel housing without
binding. The MA-6 and MA-8 type inertia reel spools shall be capable of accepting a minimum of 18 inches of
standard shoulder harness attachment webbing within the inertia reel housing without binding. The MA-14 and
MA-16 type inertia reel spools shall be capable of accepting a minimum of 24 inches of standard shoulder harness
attachment 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 inertia
reds, the inertia reel housing subassembly control head shall be capable of being rotated within the plane
perpendicular to the take-up spool axis of rotation with a minimum of 12 uniformly spaced adjustments with one
on each cardinal point without degrading the capability of the manual cent.ro! handle/manual control cable
subassemblies to actuate the inertia reel lock. 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). For
inertia reels of these types, the shoulder harness attachment webbing shall consist of either a webbing lead-in strap
subassembly, as detailed herein, or an integrated restraint harness assembly lead-in strap. The integrated restraint
harness assembly shall comply with the applicable seat system/restraint system requirements and drawings. For
the webbing lead-in strap subassembly. the webbing shall conform to MIL-W-25361, Type IV, except that the
width shall be 1.75 0.0625 inches. the thickness shall be 0.055 to 0.075 inches. and the minimum breaking
strength shall be 8.000 pounds. The webbing lead-in strap shall have a fitting, as depicted in Figure 7, for
attachment to the harness. The webbing shall be securely attached to the spool with an appropriate end fitting to
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