Bore mitigants for solid propellant rocket motors

Details Bore mitigants for solid propellant rocket motors Bore mitigants for solid propellant rocket motors

1993-02-24

1995-02-07

Nelson, Peter A.

Ammunition and explosives

Powder form

Having burning inhibiting means

102287, 102291, C06B 4500

Patent

active

053867769

ABSTRACT:
Methods and materials for modifying rocket motors to render them safer are disclosed. The invention is primarily related to placing within the bore of a rocket motor a sufficient quantity of a material mitigant such that if the rocket motor receives an unintended impact, the material mitigates the effects of the impact, and prevents ignition or explosion of the propellant. The material mitigant may take a number of forms; however, polymer foams and fibers of various types have been found to work well. It is presently preferred that the material mitigants have a density of not less than approximately 0.04 grams/cc. Examples of such materials include polyurethane foam, polystyrene, and Kevlar.RTM. fibers. It is also preferred that the material mitigant not be reactive with the propellant in the rocket motor. While the material mitigant is configured such that it absorbs fragments or energy of propellant dislodged by the impact, at the same time it does not interfere with the normal ignition and operation of the rocket motor.

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