In non-recoil-operated firearms, it is generally the entire firearm that recoils. The barrel is a moving part of the action in recoil-operated firearms. These momenta are calculated by:Įjecta mass × ejecta velocity = recoiling mass × recoil velocity The result is required by the conservation of momentum such that the ejecta momentum and recoiling momentum are equal. The same forces that cause the ejecta of a firearm (the projectile(s), propellant gas, wad, sabot, etc.) to move down the barrel also cause all or a portion of the firearm to move in the opposite direction. Finally came Maxim's 1883 automatic recoil operated machine gun which introduced the modern age of automatic machine guns.ĪNIMATION Browning AUTO 5 "cycle of one shoot", YouTube Furthermore, in 1875 a means of cocking a rifle through recoil was patented through the patent agent Frank Wirth by a German called Otto Emmerich. Friberg patented a design which introduced both flapper-locking and the fully automatic recoil operated machine gun. Later in the 1870s, a Swedish captain called D. In 1864 after the Second Schleswig War, Denmark started a program intended to develop a gun that used the recoil of a fired shot to reload the firearm, though a working model wouldn't be produced until 1888. The next to mention recoil operation in the British patent literature is by Alexander Blakely in 1862, who clearly describes using the recoil of a fired cannon to open the breech. He had three British patents related to firearms around the 1850s to the 1860s however all of them refer to a means of dampening recoil in firearms, which wasn't a new idea at the time, rather than true recoil operation. Around this time an American by the name of Regulus Pilon is sometimes stated to have patented in Britain a gun that used a limited form of recoil operation. The earliest mention of recoil operation in the British patent literature is a patent by Joseph Whitworth filed in 1855 which proposed to use recoil to partially open the breech of a rifle, the breech then being manually pulled the rest of the way back by hand. Recoil-operation, if it was invented in 1663, would then lay dormant until the 19th century, when a number of inventors started to patent designs featuring recoil operation this was due to the fact that the integrated disposable cartridge (both bullet and propellant in one easily interchangeable unit) made these designs viable. However no one has been able to verify this claim in recent times, although there is another automatic gun that dates from the same year, but its type and method of operation are unknown.
The earliest mention of recoil used to assist the loading of firearms is sometimes claimed to be in 1663 when an Englishman called Palmer proposed to employ either it or gases tapped along a barrel to do so.
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