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EFFECTIVITY:
C I R R U S
C O M P O N E N T M A I N T E N A N C E M A N U A L - C A P S
M O D E L S R 2 0
01 Feb 2013
D. Incremental Bridle and Deployment Bag
The rocket motor is attached to the deployment bag via a set of Teflon sheathed stainless steel cables,
or rocket lanyards, and an incremental bridle. The incremental bridle consists a length of nylon web-
bing that is folded in half and sewn with a series of bartack stitches. Upon activation these stitches are
peeled away to provide proper rocket/bag dynamics by acting as a shock absorber. The incremental
bridle, which is connected to the end of the rocket lanyards is protected from the rocket exhaust by a
heavy kevlar sheath.
A deployment bag is used to contain the packed parachute assembly within the fuselage enclosure
and stage its deployment and inflation sequence. The parachute assembly is packed into two compart-
ments within the deployment bag. The innermost compartment contains the canopy and is secured by
an internal flap that is locked in place with a series of locking loops to ensure that the canopy cannot
be extracted from its compartment until the suspension lines, stored in the outer compartment, are
pulled taut, and the line stows are extracted from the locking loops that hold the flaps closed.
The suspension lines are secured with a hook and loop closure. The four outer flaps are secured with
five steel curved release pins attached to the riser. The pins are extracted when the riser is pulled taut
during extraction. The deployment bag creates an orderly deployment process by allowing the canopy
to inflate only after the rocket motor has pulled the aircraft attachment harness, riser and suspension
lines taut and pulled the deployment bag off the canopy. This prevents any slack or uneven tension in
the suspension lines during canopy inflation that could result in a malfunction.
