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Figure 1-31. Residual Pressure Curve and Critical Period for Case Rupture (20 mm Gun of Example).

Figure 1-31. Residual Pressure Curve and Critical Period for Case Rupture (20 mm Gun of Example).

quarter inch during the time for which the residual pressure is high enough to cause rupture of the case near its base. Since a one-quarter inch movement is permissible and the time during which this movement can occur is about 0.00166 second, the allow-able average bolt velocity during this interval is equal to

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