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When the bomb using the Parachute and Striker Attachments No. 1 Mk I is released, the cover pulls the chute out. The chute opens and pulls the snatch rod against the action of the spring until the striker rod retaining balls escape into the annular recess in the retaining sleeve. The striker rod then moves down against the striker pellet. On impact, the inertia of the rod and pellet combine to shear the shear wire, overcome the creep spring, and pierce the ignition cap, igniting the blowing charge and blowing the base adapter and complete tail and parachute assembly from the body tube. The quick match, which passes through the lid and into the central tube of the rearmost magnesium alloy fire-pot, is also ignited, and, in turn, the quick match ignites the delay charges in and around the central tube of the tire-pot. While the central tube delay charge is burning through, the outer delay charge initiates the surrounding priming charge, which, its turn, ignites the incendiary composition around it. Meanwhile the central delay charge burns through and fires the ejection charge in the base of the fire-pot. This has the effect of ejecting the activated fire-pot from the bomb and also igniting the quick match of the second fire-pot, etc. Each ejected lire-pot will continue to burn for approximately 10 minutes; the mag¬nesium alloy container and lid being consumed, Finally, the quick match in the lid closing the nose of the bomb is ignited by the last ejection charge and initiates the priming charge, which, in turn, ignites the incendiary composition of the nose, and provides an additional fire source.
When used with the Parachute and Striker Attachments No. 1 Mk II, the parachute is blown out of the cylindrical shroud on the tail and the chute opens, freeing the striker mechanism. Functioning after this is same as that with Attachments No. 1 Mk I.
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