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FOX7/GAP rocket propellants for a shoulder launched projectile

: Lips, H.; Menke, K.

Wickert, M.; Salk, M. ; Fraunhofer-Institut für Kurzzeitdynamik, Ernst-Mach-Institut -EMI-, Freiburg/Brsg.; International Ballistics Society -IBS-:
27th International Symposium on Ballistics 2013. Proceedings. Vol.1: Interior Ballistics, Exterior Ballistics, Launch Dynamics, Vulnerability & Survivability, Explosion Mechanics : Freiburg, Germany, 22-26 April 2013
Lancaster, Pa.: DEStech Publications, 2013
ISBN: 978-1-60595-106-5
International Symposium on Ballistics <27, 2013, Freiburg>
Fraunhofer ICT ()

Several Fox7 based propellant formulations were studied in order to obtain a minimum or reduced smoke composite propellant with inherent IM-properties. Two polymer binder systems are examined: the high energy GAP and a low energy poly-urethane binder containing a large fraction of high energetic plasticizers. Variation of the AP level in the Fox7/GAP propellants gives burn rates of between 10 and 20 mm/s with low pressure exponents. Crawford as well motor-firings of Fox7/AP/GAP formulations indicated a surprising plateau burning behaviour between 7 and 12 MPa, very similar to Double-Base propellants. Chemical stability and sensitivity data demonstrated acceptable values. Fox7/PU compositions with nitro plasticizers exhibit the best thermal stability within ARC measurements. Shock sensitivity test results correspond to values with a 1.3 hazard classification. The conclusion is that Fox7/GAP propellants are suitable for the rocket propulsion of projectiles in shoulder lau nched weapons, although the mechanical properties may need further improvement.