MIL-DTL-85769B(AS)
4.5.4.4 Transportation vibration. The rocket motors shall be subjected to a composite
version of MIL-STD-810, Method 514.5, Procedure I, Category 4, Truck Transportation over
U.S. Highways, for 3 hours per axis for a total of 9 hours. The composite transportation
vibration profile is provided in Figure 1. The rocket motors shall be in their shipping
configuration for the test. The rocket motors shall be temperature conditioned to the
temperatures specified in Table II for 8 to 9 hours prior to test and maintained at the temperature
specified in Table II for the duration of the test.
1
0.1
0.01
PSD (g2/Hz)
0.001
0.0001
1
10
100
1000
FREQUENCY (Hz)
Breakpoints
Freq/PSD
10/0.01500
40/0.01500
120/0.00200
121/0.00300
200/0.00300
240/0.00150
250/0.00050
500/0.00015
FIGURE 1. Transportation vibration profile for vertical, longitudinal, and transverse axes.
4.5.4.5 Two-foot drop. The uncrated rocket motors shall withstand a drop of 2 feet
measured from the lowest point on the motor to the impact surface. The impact surface shall be
a 2-inch thick steel plate (Brinell hardness of not less than 207) embedded in not greater than 2
feet of reinforced concrete. Motors shall be dropped horizontally. Motors shall be temperature
conditioned for not greater than 8 hours at -40°F before testing. Motors shall be drop tested
within 15 minutes after removal from conditioning. If out of conditioning for more than 15
minutes, the motors shall be reconditioned at -40°F. Reconditioning time shall be 2 minutes for
each minute (over 15) the motor was out of the conditioning chamber. Reconditioning time shall
be not greater than 8 hours.
4.5.4.6 Acceleration. During firings, the rocket motor shall withstand a simulated
acceleration of 15 g's through the longitudinal axis in accordance with MIL-STD-810, Method
513.4.
7
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