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M46 Twin MG Pedestal Mount

Illustration of the M46 pedestal mount for twin water-cooled .50 caliber machine guns. (Source: TM 9-230: Machine Gun Mounts for Boats, War Department Technical Manual, October 1943.)

Figure 3—Twin Cal. .50, Machine Gun, Pedestal Mount M46, with Water-cooled Guns

Figure 3—Twin Cal. .50, Machine Gun, Pedestal Mount M46, with Water-cooled Guns

 

Naval 3-Inch Mark 21 Mount

Left and right-side views of the Mark 21 mount for the 3-inch/50 cal. naval gun from Naval Ordnance and Gunnery, NAVPERS 16116, Bureau of Naval Personnel, Training Division, May 1944.

The 3-inch/50 cal. gun and mount (Mark 21); left-side view.

The 3-inch/50 cal. gun and mount (Mark 21); right-side view.

The 3-inch/50 cal. gun and mount (Mark 21); left-side view.

The 3-inch/50 cal. gun and mount (Mark 21); left-side view.

 

M39 .50 Cal. Pedestal Mount

Illustration of the M39 pedestal mount for the .50 caliber machine gun. (Source: TM 9-230: Machine Gun Mounts for Boats, War Department Technical Manual, October 1943.)

Figure 1—Cal. .50, Machine Gun, Pedestal Mount M39, with Aircraft Machine Gun

Figure 1—Cal. .50, Machine Gun, Pedestal Mount M39, with Aircraft Machine Gun

 

Mark 24 Naval Gun Mount

Illustration of the Mark 24 3"/50 cal. naval gun mount from: Naval Ordnance and Gunnery, NAVPERS 16116, Bureau of Naval Personnel, Training Division, May 1944.

3"/50 cal. gun and Mark 24 mount.

3"/50 cal. gun and Mark 24 mount.

 

40-mm Twin Gun Assembly

40-mm Twin Gun Assembly (Source: Naval Ordnance and Gunnery, NAVPERS 16116, Bureau of Naval Personnel, Training Division, May 1944.).


 

155-mm Gun M2

Data pertaining to the 155-mm gun M2, the carriage M1 or M1A1, the 155-mm gun mount M13 (T14), and the limbers M2 and M5. All data from the WWII U.S. War Department Technical Manual TM 9-350: 155-mm Gun M2; Carriage M1 and M1A1, Gun Mount M13; Heavy Carriage Limber M2 and M5; and Firing Platform M1, May 1945.

TABULATED DATA.

a. Data pertaining to 155-mm gun M2.

(1) GENERAL.

Weight of gun (complete with breech mechanism)     9,595 lb
Weight of tube assembly (barrel)   9,190 lb
Length of tube   277.37 in.
Length of bore   cal. .45
Length of rifling   230.57 in.
Powder pressure (normal pressure with maximum charge in a new gun) lb per square in   40,000
Type of breecblock   Interrupted screw
Weight of breech mechanism   405 lb
Type of firing mechanism   continuous pull percussion hammer

(2) PERFORMANCE.

Muzzle velocity (average velocity with a new gun in feet per second):
     Shell AP (Maximum zone charge)   2,745 fps
     Shell HE (Maximum zone charge)   2,800 fps
Range: (Maximum)
     AP Shell   24,075 yd
     HE Shell   25,715 yd
Rate of fire:
     Normal   round 1 (per 2 minutes)

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M55 Quad .50 cal Mount and Trailer

Front and rear views of the M55 quad .50 cal. mount and trailer from ORD 7 SNL G-220: Organizational Spare Parts and Equipment for Mount, Trailer, Multiple Cal. .50 Machine Gun, M55, Ordnance Supply Catalog, Headquarters, Army Service Forces, June 1945.

M55 Multiple .50 cal. Machine Gun Trailer

FIGURE 1—MOUNT, TRAILER, MULTIPLE CAL. .50 MACHINE GUN, M55 (FRONT VIEW)

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M43 Machine Gun Pedestal Mount

Illustration of the M43 pedestal mount for the water-cooled .50 caliber machine gun. (Source: TM 9-230: Machine Gun Mounts for Boats, War Department Technical Manual, October 1943.)

Figure 2—Cal. .50, Machine Gun, Pedestal Mount M43, with Water-cooled Gun

Figure 2—Cal. .50, Machine Gun, Pedestal Mount M43, with Water-cooled Gun

 

M51 Multiple Machine Gun Carriage

Side and rear views of the M51 quad .50 cal. mount and trailer from ORD 7 SNL G-217: Organizational Spare Parts and Equipment for Carriage, Multiple Cal. .50 Machine Gun, M51, Ordnance Supply Catalog, Headquarters, Army Service Forces, October 1944. The M51 was composed of the M17 trailer and the M45 multiple .50 cal. mount.

M51 Antiaircraft Multiple Quad .50 cal. MG Trailer

FIGURE 1—CARRIAGE, MULTIPLE CAL. .50 MACHINE GUN, M51—SIDE VIEW

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