The Syrian airfield prepare for reception of military aircraft of China
The latest news about fast emergence in borders of Syria of navy of China encouraged Syrians and res[...]
RETROROCKET IGNITION SYSTEM
Four solid propellant retrorockets are mounted equidistant around the aft interstage assembly, and when ignited, assure clean separation of the third stage from the second stage by decelerating or braking the spent booster. Each retrorocket is rated for a nominal thrust of 35,000 pounds, weight of 384 pounds, and burn time of about 1.5 seconds.
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Retrorocket System |
A signal from the second stage initiates two EBW firing units located on the aft interstage. The EBW firing units ignite two detonator manifolds, which in turn ignite the retrorockets through redundant pairs of confined detonating fuse (CDF) and pyrogen initiators.
Ullage Rocket System
ULLAGE CONTROL ROCKET IGNITION AND JETTISON SYSTEM
Two solid propellant ullage rockets, located on the third stage aft skirt just forward of the stage separation plane, are ignited on signal from the stage sequencer by EBW initiators.
After firing, the burned-out ullage rocket casings and fairings are jettisoned to reduce stage weight. Upon command from the stage sequencer, two forward and aft frangible nuts, which secure each rocket motor and its fairing to the stage, are detonated by confined detonating fuse (CDF), to free the entire assembly from the vehicle.