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.
a. Data pertaining to 155-mm gun M2.
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
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)
b. Data pertaining to carriage M1 or M1A1.
Weights: Gun and carriage (firing position) 27,700 lb Gun and carriage (complete with accessories, traveling position) (M2 limber) 29,900 lb (M5 limber) 30,100 lb Bogie 5,375 lb Dimensions in traveling position, over-all: (with heavy carriage limber M2) Length 34 3/8 ft Width 98 7/8 in. Height 102 1/4 in. Dimensions in traveling position, over-all: (with heavy carriage limber M5) Length 36 5/6 in. Width 98 7/8 in. Height 107 in. Towed by (with limber) M4 tractor, 18-ton, high speed (without limber) semi-trailed Truck, 7 1/2 ton, 6 x 6, with semi-trailer Recoil mechanism: Model M3A1 Maximum allowable recoil (approx) 70 in. Type of recoil mechanism Hydraulic Type of counterrecoil mechanism Hydropneumatic Weight 3,890 lb Type of equilibrator Pneumatic Tires: Type and size 11 x 20 std Type and size tubes 10 x 20 std Air pressure: bogie assembly tires (normal) 45 psi Air pressure: limber assembly tires (normal) 65 psi Brakes, type mechanical, air or manually operated Wheel base of bogie 47 in. Tread (center-to-center of inside bogie wheels) 62 in. (center-to-center of outside bogie wheels) 88 1/2 in.
Limits of elevation: Maximum 63 deg 20 min Depression minus 1 deg 50 min Limits of traverse in degrees right or left 30 deg Elevation per turn of handwheel in mils 13.10 mils Diameter of circle of emplacement 37 ft Traverse per turn of handwheel 10 mils
Recoil oil: Reserve in replenisher (recoil) (normal) 1 1/5 pt Reserve in recuperator (counterrecoil) 2 pt
c. Data pertaining to 155-mm gun mount M13 (T14).
Mounted on gun motor carriage M40 Recoil Mechanism M21
Limits of elevation. Maximum 45 deg Depression minus 5 deg Limits of traverse. Right 18 deg Left 18 deg Total traverse 36 deg
d. Data pertaining to limbers M2 and M5.
M2 M5 Width, over-all 95 3/4 in. 95 in. Weight 2,000 lb 2,200 lb Tires: Type and size 11 x 20 std 11 x 20 std Type and size tubes 11 x 20 std 11 x 20 std
e. Data pertaining to sighting equipment.
Aiming post M1
Aiming post light M14
Gunner’s quadrant M1 or M1918
Panoramic telescope M12 or M5A5
Telescope mount M18A1
Quadrant mount M1
Instrument light M5
Instrument light M12
Instrument light M19