SUN 143-120. Modification of 2.75 Inches FFAR Stabilizing Rod to Eliminate Erratic Pressure and Thrust Excursions When Static Tested at + 165 Degrees F.
SUNFLOWER ARMY AMMUNITION PLANT LAWRENCE KANS
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Through experimental work, a modification of the stabilizing rod in the 2.75 inches FFAR was developed which would eliminate the occurrence of erratic pressure and thrust excursions NOTS Pips in the static testing of grains at 165 deg F. This modification involved changing the diameter and length of the potassium sulfate on the stabilizing rod. The change from 0.3 to 0.5 inch diameter and from 12.0 to 6.0 inches length completely eliminated the occurrence of NOTS Pips when grains were tested at 180 def F. Author