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Page Title:
Inertia reel locking mechanism actuation |
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|  MIL-R-8236F
4.4.3.1.1.2 Inertia reel locking mechanism actuation (MA-2 inertia reel) demonstration. The MA-2 type
inertia reel locking mechanism shall be functioned using an MA-2 type manual control handle subassembly
attached to an MA-2 type manual control cable subassembly to ascertain whether the cable throw (stroke) of 0.38
0.03 inch fully and completely activates the MA-2 type inertia reel lock/unlock mechanism. This demonstration
shall be repeated 5 times.
4.4.3.1.1.3 Inertia reel locking mechanism actuation (M A-6, MA-8, MA-14, and MA-16 type inertia reels)
demonstration. The MA-6, MA-8, MA-14, and MA-16 type inertia reel locking mechanisms shall be functionted
using an MA-6, MA-8, MA-14, and MA-16 type manual control handle subassembly attached to an MA-6, MA-8,
MA-14, and MA-16 type manual control cable subassembly to ascertain whether the cable throw (stroke) of 0.68
inches fully and completely activates the MA-6, MA-8, MA-14, and MA-16 type inertia reel lock/unlock
mechanism. This demonstration shall be repeated 5 times.
4.4.3.1.2 Inertia reel housing subassembly interchangeability. The inertia reel housing subassembly shall be
mated with 6 samples of each QPL webbing lead-in strap subassembly and each existing restraint harness assembly
to assess its compatibility with existing inventories and with 6 samples of each QPL manual control cable
subassembly and each QPL manual control handle subassembly combination to assess its ability to perform in
accordance with the requirements specified herein, with each such potential combination in current inventories.
4.4.3.1.3 inertia reel housing subassembly shoulder harness attachment cable (MA-1 and MA-2 type inertia
reel) inspection. The cable for shoulder harness attachments for the MA-1 and MA-2 type inertia reel housing
subassemblies shall be inspected for conformance to MIL-W-83420 and secure attachment to the cable drum. The
swaged-type clevis end fitting shall be inspected to assure compliance with Figures 5 and 6. as applicable On all
inertia reel housing subassemblies where Dimension "A" on Figures 1 and 2 is more than 0.0 inch, the cable shall
be retracted and measured to demonstrate that the permanent stop prevents the inertia reel from retracting more
than 18 inches of cable from the fully extended position. The inertia reel housing subassembly shall be inspected
for a durable dust cover and guide for the shoulder harness cable.
4.4.3.1.4 Inertia reel drum/spool capacity demonstration. The shoulder harness cable of the MA-1 and MA-2
type inertia reel housing subassemblies shall be fully extended and measured. The cable shall then be retracted and
extended 10 times to demonstrate performance without binding. The shoulder harness webbing of the MA-6,
MA-8, MA-14, and MA-16 type inertia reel housing subassemblies shall be fully extended and measured. The
webbing shall then be retracted and extended 10 times to demonstrate performance without binding.
4.4.3.1.5 inertia reel housing subassembly adjustability demonstration. For MA-6, MA-8, MA-14, and
MA-16 type inertia reels, the inertia reel housing subassembly control head shall be rotated within the plane
perpendicular 10 the take-up spool axis and them functioned to verify the capability of adjustment in a minimum of
12 positions without degradation below inertia reel performance requirements specified herein.
4.4.3.2 Shoulder harness attachment subassembly.
4.4.3.2.1 Shoulder harness attachment webbing (MA-6, MA-8, MA-14, and MA-16 type inertia reels)
inspection. Where applicable. the webbing used for shoulder harness attachment shall be inspected for
conformance 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 inch and the breaking strength shall beat least 8,000 pounds. Webbing replacement shall be
demonstrated without disassembly of the inertia reel. The end fitting shall be inspected for compliance with
Figures 7 and 8. During the webbing replacement, the insertion distance of the webbing into the end fitting shall
be measured. Inspection of the inertia reel shall demonstrate that the webbing is protected against damage by
snagging or nibbing at the point of attachment.
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