Rocket motor construction from porous binder core
First Claim
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1. A method for the manufacture of a solid propellant-based rocket motor, said method comprising:
- (a) forming a body of solid foraminous poly(vinyl alcohol) in the shape of a propellant grain of a solid propellant-based rocket motor with an axial passage;
(b) encasing said body of solid foraminous poly(vinyl alcohol) in a solid inert shell;
(c) with said axial passage blocked, filling the interstitial volume of said body of solid foraminous poly(vinyl alcohol) with a liquid oxidizer; and
(d) permitting said liquid oxidizer to permeate said poly(vinyl alcohol) and to thereby form a solid continuous mass.
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Abstract
Rocket motors are constructed by encasing a solid porous poly(vinyl alcohol) core in the shape of the propellant grain with motor casing material in the same manner as motor casing material is conventionally applied over a disposable or removable mandrel. The motor is then completed by filling the open passages of the core with liquid oxidizer. When the liquid oxidizer permeates the poly(vinyl alcohol), the result is a solid continuous propellant grain of rubbery consistency. Aluminum powder may be incorporated in either the porous poly(vinyl alcohol) or the liquid oxidizer to achieve a fuel-enhanced propellant.
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Citations
52 Claims
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1. A method for the manufacture of a solid propellant-based rocket motor, said method comprising:
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(a) forming a body of solid foraminous poly(vinyl alcohol) in the shape of a propellant grain of a solid propellant-based rocket motor with an axial passage; (b) encasing said body of solid foraminous poly(vinyl alcohol) in a solid inert shell; (c) with said axial passage blocked, filling the interstitial volume of said body of solid foraminous poly(vinyl alcohol) with a liquid oxidizer; and (d) permitting said liquid oxidizer to permeate said poly(vinyl alcohol) and to thereby form a solid continuous mass. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for the manufacture of a solid propellant-based rocket motor, said method comprising:
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(a) combining a corrugated sheet of poly(vinyl alcohol) with at least one non-corrugated sheet of poly(vinyl alcohol) into a composite sheet and winding said composite sheet around a mandrel to form a cylindrical body of foraminous poly(vinyl alcohol) with an axial passage defined by said mandrel; (b) encasing said cylindrical body of foraminous poly(vinyl alcohol) in a solid inert shell; (c) with said axial passage blocked, filling the interstitial volume of said cylindrical body of said foraminous poly(vinyl alcohol) with a liquid oxidizer; and (d) permitting said liquid oxidizer to permeate said poly(vinyl alcohol) and to thereby form a solid continuous mass. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for the manufacture of an encased foraminous propellant binder for combination with a liquid oxidizer to form a solid propellant-based rocket motor, said method comprising:
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(a) combining a corrugated sheet of poly(vinyl alcohol) with at least one non-corrugated sheet of poly(vinyl alcohol) into a composite sheet and winding said composite sheet around a mandrel to form a cylindrical body of foraminous poly(vinyl alcohol) with an axial passage defined by said mandrel; and (b) encasing said cylindrical body of foraminous poly(vinyl alcohol) in a solid inert shell. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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- 50. A binder-filled motor case for use in forming a solid propellant-based rocket motor by addition of a liquid oxidizer, said binder-filled motor case comprising a body of solid foraminous poly(vinyl alcohol) in the shape of a propellant grain of a solid propellant-based rocket motor with an axial passage, encased in a solid inert shell.
Specification