Small Craft Test Results of the U. S. Army XM-30 Armored Turret.
NAVAL ORDNANCE LAB WHITE OAK MD
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The U. S. Army XM-30 Twin Caliber .30 Armored Turret was tested on a Patrol Boat, River PBR and a 45-Foot Utility Boat in support of the U. S. Navys small craft armament program. The XM-30 is handwheel driven in azimuth and elevation and was designed for use on land vehicles such as armored personnel carriers. Prefiring functional trials of the turret controls were conducted during highspeed maneuvers of the PBR the mount was then test fired from the Utility Boat. The train and elevation controls responded smoothly throughout the tests. However, it is necessary that the operator be thoroughly trained with the controls in order to track a sight picture that rapidly changes as a boat rolls and pitches. The average number of hits on a forty-feet long by eight-feet high target was a combined 35 percent at 250 and 500 yard ranges and decreased to 21 percent when including ranges to 1500 yards. Firing recoil did not cause the guns to stray from the target as with the Mk 46 Mod 0 Pintle and Mk 36 Mod 0 Scarf-ring Mounts used on the PBR. The results indicate that this type of gun turret drive would be of use in small craft armament applications, especially where hydraulic or electric power is limited. Author
- Marine Engineering