MIL-DTL-85097/14D(OS)
6.3.1.5 Launch time. Launch time is defined as the time between first indication of thrust on the axial thrust
curve and strip off.
6.3.2 Sustainer motor.
6.3.2.1 Maximum resultant thrust. Maximum resultant thrust is defined as the maximum vectorial sum of
all components of rocket motor thrust in any one instant.
6.3.2.2 Ignition delay. Ignition delay is the elapsed time from strip off to 10 percent of maximum thrust, as
measured on the rising portion of the normal component rocket thrust trace.
6.3.2.3 Action time. Action time (tA) is the time interval from the 10 percent of maximum thrust on the
initial rise of the normal curve to the corresponding 10 percent of maximum thrust on the declining portion of
the curve.
6.3.2.4 Impulse. The impulse is obtained by vectorially adding the longitudinal and normal impulse of the
rocket motor taken over the action time.
6.3.3 Strip off. Strip off occurs when the booster piston has fully seated in the booster tube, allowing booster
gases to pass through the booster ports and ignite the secondary igniter and sustainer grain. This occurs at a
point 32 inches into the stroke of the catapult.
6.4 Changes from previous issue. Marginal notations are not used in this revision to identify changes with
respect to the previous issue. However, the only changes were: the upper firing temperature in tables I, II, and
III was changed from 150 to 160 F; in table III, the sample size for lot sizes of "111 to 150" was corrected
to read "14."
Preparing activity:
Navy - OS
(Project 1377-0062)
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