United States of America As Represented by the Secretary of the Air Force

Francisco Q Roberto

John E O'Pray

Ronald E Channell

Arnold M Crelier

Robert L Geisler

David M Husband

Gary D Lium

A process for determining the aging characteristics of solid rocket propellant samples by measuring their dynamic mechanical properties is disclosed. Samples of rocket propellant are tested using a mechanical spectrometer at low strain levels and low frequencies. Since the dynamic storage modulus of a sample increases with aging time and aging temperature, it is an indicator of the acceptability of the propellant sample as a usable fuel source. The process allows a user to determine empirically the aging rate of a sample for each aging temperature with a nondestructive test procedure.

Solid propellant service life analysis via nondestructive testing

A method for improving the ballistic properties of aluminum powder based rocket propellants by treating the aluminum powder with hydrogen fluoride gas prior to its incorporation into a propellant formulation.

Method for improving metal combustion in solid rocket propellants

A solid propellant, gas generating formulation for use in providing gaseous reactants to a chemical laser. The formulation comprises a compressed powdered mixture of perfluoroammonium salts of the fluorinated Lewis acids, a metal nitride, and an alkali metal fluoride.

Fluorine generating formulation for use in chemical lasers

A solid fluorine generating composition for use in a chemical laser which comprises a mixture of a xenon fluoride and a hydrocarbon or fluorohydrocarbon polymer.

Fluorine generating solid formulation for use in chemical lasers

A solid propellant formulation which utilizes the addition of low levels of transition metal fluorides, such as cupric fluoride and ferric fluoride, as a modifying agent to increase the propellant burning rate while simultaneously decreasing its pressure exponent.

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Lancaster, CA, United States of America

Francisco Q Roberto