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|  NIL-M-46314B(MU)
DESCRIPTION
NOMENCLATURE
Standard type conforming to the accuracies
Hot and cold chamber
10
outlined in test facilities specified
under test facilities of MIL-F-13926.
Standard shop type accurate to within
2.
Torque wrench and scale
10% of drawing tolerance.
4.6 Test methods and procedures.
4.6.1 Environmental.
4.6.1.1 Temperature test.- The telescope mount shall be subected to
Test Procedure I of MIL-F-13926; however, the temperatures specified in
3.3.1 shall apply and the extreme temperatures of -80F and +160F shall be
excluded from this procedure. When the telescope mount has been stabilized
at the temperature specified, the result of the specified test shall conform
to the limits outlined in 3.3.1 using test procedures outlined herein.
4.6.2 Performance.
4.6.2.1 Vibration.- The telescope mount shall be vibrated in accordance
with Test Procedure V of MIL-F-13926, however, the duration frequency and
amplitude shall be as specified in 3.3.2. After completion of the vibration
test, the mount shall be inspected for broken and damaged parts using visual
and tactile inspection techniques to assure compliance with 3.3.2.
4.6.2.2 Orientation.- To assure proper orientation of the fixture and
mount, use set-up instruction on Drawing F8599906, and the targets shown as
Figures 1 and 2."
4.6.2.3 Excursion ranges.
4.6.2.3.1 Cant.- With the mount positioned as outlined in 4.6.2.2,
rotate the cant knob maximum clockwise direction and position the inspection
aid over the proper set of pins of the sighting device. read the cant angle
when inspection aid level vial indicates level. This angle must conform to
the limits specified in 3.5.1.1. Repeat this procedure after rotating the
cant knob to the maximum counter-clockwise position and observe the angular
reading for conformance with 3.5.1.1.
4.6.2.3.2 Pitch. - With the mount positioned as outlined in 4.6.2.2,
rotate the pitch knob maximum clockwise direction and position the inspec-
tion aid over the proper set of pins of the sighting device. Read the pitch
angle when the inspection aid indicates level for conformance with 3.5.1.2,
Repeat this procedure after rotating the pitch knob to the maximum counter-
clockwise position and observe the angular reading for conformance with 3.5.1.2.
9.
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