| 摘要 |
A safe-and-arm device for a projectile fired from a smooth bore gun has a rotor that rotates between a safe position and armed position. A setback sensor retains the rotor in the safe position until an acceleration of the projectile causes the setback sensor to be repositioned. Once the setback sensor is repositioned, a bore rider is released and a rotor spring rotates the rotor to arm the projectile.
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