Stability of 90 mm Shell T3
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
It is found that the stability factor of the 90 mm A.A. Shell T3, with the Mechanical Time Fuze M43, fired from the A.A. Gun T2 with a twist of rifling of 130 at a muzzle velocity of 2800 fs, is 1.515. If the twist were reduced to 132, the stability factor would be 1.33, and the projectile would still be sufficiently stable. A twist of 130 is recommended.
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