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Page Title:
Preproduction Evaluation of 28 Loaded Motors (See Figure 1, Page 18 Preproduction Test Schedule). |
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|  MIL-J-7093A (Weps)
(c) The term Su where Su is the upper specification limit minus
3SX for the property under consideration.
(d) The term SL where SL is the lower specification limit plus
3 sX for the property under consideration.
(e) The term tu where:
(f) The term tL w h e r e :
(g) The term S`U where:
(h) The term S'L where:
Control chart values and limits (4.6.1 thru 4.6.6) shall be com-
4.6.7
puted when sufficient data have been accumulated to provide a base period of
at least twenty-five (25) sub-groups at each temperature. Values and limits
shall be recomputed at least each time the number of observations has doubled.
4.6.8
Factors. -Useful factors in the construction of Control Charts
on observations (4) samples (N) may be obtained from Table B2, page 115,
ASTM manual on Quality Control of Materials.
4.7
Preproduction Evaluation of 28 Loaded Motors (See Figure 1, Page 18
Preproduction Test Schedule).
Inspeciton Requirements. - All preproduction motors shall be inspected
4.7.1
to the drawing and specification requirements listed on LD 515662.
Vibration, Temperature Cycling, and Shock Tests. -Four (4) rocket 4 units
4.7.2
motors representing four (4) propellant batches shall be conditioned at -75 F and
150F and maintained at the specified temperature within 10F during the tests.
The motors shall be supported from the lugs. The specified accelerations shall be
10
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