BAROSTATIC RELEASE UNIT (BRU).-

The barostatic release unit (fig. 5-11) provides a housing for the cartridge that provides the gas flow to initiate harness release and parachute rocket deployment. The cartridge is activated either electrically by the sequencer or by the righthand start switch (via the delay mechanism). The cartridge incorporates an aneroid capsule to prevent mechanical initiation above a preset altitude. The cartridge may also be initiated by operation of the MOR handle after ejection.

Figure 5-10.-Electronic sequencer.

Figure 5-11.-Barostatic release unit.

^{Barostat Assembly.}- The barostat consists of an aneroid capsule in a housing that is screwed into the release unit in a position that allows a peg attached to the capsule to engage a star wheel in the delay mechanism. At altitudes in excess of the barostat rating, the peg engages the star wheel and prevents the delay mechanism from operating. As altitude decreases, the capsule peg retracts and allows the mechanism to function.

^{Impulse Cartridge.} - The impulse cartridge (CCU-102/A) provides the gas necessary for the functions of the restraint release assembly.