Test and Development of 3-in./70 Gun Barrels. Recovery Test of 3-in./70 AA Projectiles in Gun Type G Mod 12 Ser 24927.
Partial rept. no. 44 and Final rept.,
NAVAL PROVING GROUND DAHLGREN VA
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Five 5 3-in.70 AA projectiles Type Ex 24 Mod 6 and five 5 3-in.70 Q.F., H.e. British projectiles were fired in the 3-in.70 Gun Type G Mod 12 No. 24927 with 40 ESR to determine percent of theoretical spin and band condition on recovery. The average rate of spin for the American projectiles Ex 24 Mod 6 was 91.7 and for the British projectiles 90.7 of the nominal value for the projectile-gun combinations.
- Ammunition and Explosives