Methods and devices for enabling safe/arm functionality within gravity dropped small weapons resulting from a relative movement between the weapon and a rack mount

A device for enabling safe/arm functionality in a gravity dropped weapon, the device comprising:

• a rack for releasably attaching the weapon to an airframe;
• a generator disposed in the weapon such that a first portion of the generator is attached to the weapon and a second portion of the generator is attached to the releasable rack, the generator having an elastic element that is preloaded to store potential energy therein;
• a releasable connection between the weapon and the rack that separates the first and second portions to thereby release the stored energy in the elastic element such that the elastic element vibrates;
• and
• a piezoelectric member connected to one end of the elastic member for converting the vibration of the elastic element to an electrical energy.