Fig. 82.
There are two sizes for field-artillery, viz.: light and heavy, both having the same caliber.
DESCRIPTION.
| Light. | Heavy. | ||
| Calibre | inches | 1.45 | 1.45 |
| Length of gun | " | 46.4 | 70.4 |
| Height of trunnions above tread | " | 35 | 42.4 |
| Length of gun-barrel | " | 29.1 | 50.1 |
| Number of barrels | 5 | 5 | |
| Weight of each barrel | pounds | 30.8 | 79 |
| Length of rifled bore | inches | 24.7 | 43.4 |
| Number of lands | 12 | 12 | |
| Pitch of rifling | degrees | 6 | 6 |
| Weight of gun complete | pounds | 495 | 1045 |
The gun consists of five main parts: the group of barrels, the breech-piece, the mechanism, the frame, and the attachments.
THE GROUP OF BARRELS.
The five barrels are assembled around a main shaft by being secured in two bronze assembling-disks. Both disks are bolted to the main shaft, so that barrels, disks, and shaft revolve together. The main shaft goes into the breech-piece, and has screwed and bolted to its end a heavy steel pin-wheel, which connects the barrel-system with the mechanism.
