Image: RBL12pdr8cwtBarrel&BreechDiagram

Description: Diagram of barrel and breech of British RBL 12 pounder 8 cwt field gun. This shows the "New Model" with the short 72-inch barrel. A : Barrel inner tube : originally of wrought-iron; made of steel in later 72-inch barrels. B, C, D : wrough-iron coils E : Tappet-ring L : Lever-ring P : Breech-piece : forging of wrought-iron S : Breech-screw T : Trunnion ring V : Vent-piece incorporating a right-angled vent. a : Powder chamber b : Shot chamber c : Grip : narrowing of bore to force lead coating on projectile to engage with rifling grooves
Title: RBL12pdr8cwtBarrel&BreechDiagram
Credit: Figure 33, page 48-52 in "The Principles and Practice of Modern Artillery" by Lt-Colonel C.H. Owen, R.A. published by John Murray, London, 1873 Downloaded from https://archive.org/details/principlespracti00owenrich
Author: artist not identified. Assumed from UK government.
Permission: This work created by the United Kingdom Government is in the public domain. This is because it is one of the following: It is a photograph taken prior to 1 June 1957; or It was published prior to 1973; or It is an artistic work other than a photograph or engraving (e.g. a painting) which was created prior to 1973.HMSO has declared that the expiry of Crown Copyrights applies worldwide (ref: HMSO Email Reply) More information. See also Copyright and Crown copyright artistic works.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No