CHAPTER IX
THE 4.7” RIFLE, MODEL 1906.
GUN.
| Weights and Dimensions. | |
| Weight | 2,688 lb. |
| Caliber | 4.7 in. |
| Total length | 134.92 in. |
| Length of bore | 129.42 in. |
| Length of rifling | 111.9 in. |
| Number of grooves | 42 |
| Twist | Right hand. |
| Weight of proj. based fuse | 60 lb. |
| Weight of proj. point fuse | 45 lb. |
| Weight of powder charge | 95 oz. |
| Muzzle velocity, 60 lb. proj. | 1,700 ft. per second |
| Muzzle velocity, 45 lb. proj. | 2,050 ft. per second |
| Maximum range | 11,000 meters |
| THE CARRIAGE. | |
| Weight of carriage complete | 5,320 pounds |
| Weight of carriage and gun complete | 8,068 pounds |
| Maximum elevation | 15 degrees |
| Maximum depression | 5 degrees |
| Maximum traverse | 140 mils. |
The gun is built up and consists of a tube, jacket, locking hoop and clip. The jacket covers the rear half of the tube and projects beyond the tube at the rear to form the breech recess. The jacket also has a recoil lug on the under side for connecting the recoil cylinder. The clip is a short hoop near the muzzle and has guides formed on it to guide the gun in the cradle on recoil. The jacket also has guides formed on it. The length of the gun is approximately 11 feet.
4.7” Rifle
The breechblock is of the interrupted screw type having four threaded and four plain sectors. It is operated by a handle which swings from left to right turning and withdrawing the breech with one motion. An extractor is fitted for throwing out the shell case when the breech is opened after firing.
The firing mechanism is of the type known as a continuous pull mechanism, that is, the mechanism is cocked and fired by the pull on the lanyard or by downward pressure on the firing handle located at the right side of the breech.
The recoil system is of the hydro-spring type.