CHAPTER XI

THE 155 HOWITZER, MODEL 1918

THE HOWITZER.

Weights and Dimensions.

Material Alloy steel. Weight (including breech mechanism) 1,248 kg.—2,745 lbs. Caliber 155-mm.—6.1 inch. Total length 2,332-mm.—91.8 inch. Length of bore 2,177-mm.—85.7 inch. Length of rifled portion of bore 737-mm.—68.4 inch. Rifling Number of grooves 48. Width of grooves 7.145-mm.—0.2813 inch. Depth of grooves 1-mm.—0.03937 inch. Width of lands 3-mm.—0.1181 inch. Twist, right hand, uniform, one turn in 25.586 cal. Powder chamber: Diameter 158.75-mm.—6.25 inch. Length 339.85-mm.—13.38 inch.