3-IN. Mount Mark 37 and Prototypes. Special Tests on the 3-in./70 Caliber Pilot Mount Mark 28 Mod. 0.
Partial rept. nos. 3 and 7,
NAVAL PROVING GROUND DAHLGREN VA
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The 3-in.70 Caliber Mount Mark 28 Mod. 0 is a pilot model of the Mark 37 prototype. The objects of the special tests are as follows 1 to determine the causes for dropping rounds from the breech when ramming at high angles of elevation and ramming speeds at several angles of elevation, 2 to determine the gas concentration in the enclosed mount following a 20 round burst without mount ventilation, and 3 to test the Mark 37 mount recoil counter-recoil system on the Mark 28 mount.