The Effects of Temperature on Time to Propellant Cook-Off
WATERVLIET ARSENAL NY
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The Thermal Effects Test IV provided data to be used in determining time-temperature relationships for cook-off of XM123E1 Zone 8 Propelling Charges in the 155mm XM199 Cannon. This was accomplished by preheating an XM181 Cannon stub tube as uniformly as possible to selected temperatures in the nominal range 375 - 500 F. XM123E1 Zone 8 Propelling Charges, having been conditioned to 145 F, were then inserted into the chamber of the stub tube. In all, nineteen charges were loaded, and cook-off occurred in all cases. Tube temperatures at various points near the bore were monitored by thermocouples, and time to ignition was noted. From this data, a statistical curve was generated which depicts time to cook off as a function of maximum chamber temperature for the XM123E1 Propelling Charge and XM181 Cannon. Due to similarities between the XM181 and XM199 Cannon tubes, the results are equally applicable to the XM123E1 Zone 8 Propelling Charge in the XM199 Cannon.
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