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Topic: Recoil operation

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	Halfbakery: recoil powered machine gun cooling system
		recoil of the weapon would force a small piston to pump cooling media through a series of coils around the machine gun barrel, to a radiator(perhaps mounted under the barrel) then back to the piston pump.
		During the lockup period, I'm guessing that a large percentage of the recoil energy is transmitted from the face of the bolt to the receiver and to the frame of the weapon.
		Recoil operation works very well for pistols, but having the barrel move relative to the frame makes it hard to achieve perfect accuracy.
	www.halfbakery.com /idea/recoil_20powered_20machine_20gun_20cooling_20system (1052 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-10-31)
		Recoil operated firearms therefore tend to work best when using a cartridge with a grain size (mass) near where the gun's action was originally optimized in terms of momentum.
		Long recoil operated firearms have a distinct "double recoil" feel to them, the "first recoil" being the halting of the rearward motion of the bolt and barrel, and the "second recoil" being the heavy barrel returning to battery.
		Note that the shotgun must be free to recoil for this to work--the compressibility of the shooter's body is sufficient to allow this movement, but firing the shotgun from a secure position in a rest or with the stock against the ground will not allow it to recoil sufficiently to operate the mechanism.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=recoil_operation (1439 words)

	Recoil Operation - MiniMachineGun.com (Site not responding. Last check: 2007-10-31)
		Recoil operation is a type of locked-breech firearm actions used in automatic firearms.
		Long recoil operated firearms have a distinct "double recoil" feel to them, the "first recoil" being the halting of the rearward motion of the bolt and barrel, and the "second recoil" being the heavy barrel returning to battery.
		Note that the shotgun must be free to recoil for this to work--the compressibility of the shooter's body is sufficient to allow this movement, but firing the shotgun from a secure position in a rest or with the stock against the ground will not allow it to recoil sufficiently to operate the mechanism.
	www.minimachinegun.com /encyclopedia/Recoil_operation (1164 words)

	News \| Gainesville.com \| The Gainesville Sun \| Gainesville, Fla. (Site not responding. Last check: 2007-10-31)
		Recoil operation is a type of locked-breech firearm actions used in automatic firearms.
		Recoil operated firearms therefore tend to work best when using a cartridge with a grain size (mass) near where the gun's action was originally optimized in terms of momentum.
		Long recoil operated firearms have a distinct "double recoil" feel to them, the "first recoil" being the halting of the rearward motion of the bolt and barrel, and the "second recoil" being the heavy barrel returning to battery.
	www.gainesville.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Recoil_operation (1434 words)

	Recoil Pads -- Recommendations and Resources (Site not responding. Last check: 2007-10-31)
		The recoil when firing a gun is the backward momentum of a gun, which is equal to the forward momentum of the bullet or shell, due to conservation of momentum.
		The short-recoil system of operation is that which uses the recoil of the firearm to function (that is, to lock/unlock the firearm's breech, to extract and eject the cartridge case from the firearm, to feed a new cartridge into the chamber, and to ready the firing mechanism).
		In a recoil operated handgun, the barrel and slide are locked together during firing.
	www.becomingapediatrician.com /health/124/recoil-pads.html (769 words)

	Recoil operation (Site not responding. Last check: 2007-10-31)
		Recoil operation is one of the firearm actions used in automatic firearms.
		It uses the recoil of the barrel to cycle the action.
		There is a further distinction between short recoil and long recoil operation.
	www.xasa.com /wiki/en/wikipedia/r/re/recoil_operation.html (121 words)

	Tensioning and recoil system for a tracked vehicle - Patent 4881786
		Conventional recoil systems for self-laying track-type vehicle utilize pre-compressed large diameter steel coil springs to resist recoiling during light loading of the idler wheel and to return the wheel to the normal position after recoiling during heavy loading.
		With reference to the drawings, the subject track recoil and tensioning mechanism is particularly useful for providing a recoil function for the idler wheel 18 of a belted track vehicle 10, and for maintaining proper tension on the flexible belt 24.
		During operation of the vehicle 10, it is important that the tension force on the belt 24 remain substantially constant, since the belt 24 is driven by frictional engagement with the drive wheel 16.
	www.freepatentsonline.com /4881786.html (3308 words)

	Gun Show On The Net.com - Gun Encyclopedia
		The recoil when firing a gun is the backward momentum of a gun, which is equal to the forward momentum of the bullet or shell, due to conservation of momentum.
		It was recoil operated, and the cylinder and barrel recoiled backwards to cock the hammer and revolve the cylinder.
		Roller-delayed blowback is not to be confused with the older roller-locked recoil operated principle, as used in the MG-42 and MG3, where the bolt is rigidly locked to the barrel as it recoils.
	gunshowonthenet.com /page16.html (13992 words)

	[No title]
		Long Recoil System: Operation of an automatic or self-loading firearm in which the the barrel and breechblock are securely locked together at the instant of firing and then recoil, still locked, for a distance greater than the length of a complete unfired cartridge case.
		Recoil Operation System: Operation of a self loading or automatic firearm which relies on the recoiling of the barrel, due to firing, to generate the necessary power to operate the reloading cycle.
		Recoil: the backward thrust of a gun caused by the reaction to the powder gases pushing the bullet forward.
	www.lockstockandbarrel.org /OwenGun/Glossary1.htm (5889 words)

	Types of Operation (Site not responding. Last check: 2007-10-31)
		The method of operation in which the breech is kept closed by the inertia of the breech-block and pressure of the recoil spring so that, on firing, the chamber pressure 'blows the bolt back' once it overcomes this inertia.
		As the slide recoils, the rearward motion of the piston is resisted by the gas pressure bled into the tube.
		In this type of operation, the barrel actually moves inside the weapon in order to transmit force to the breech block, while keeping the breech locked until pressure inside the bore drops to a level safe enough for case extraction to begin.
	matrix.dumpshock.com /raygun/basics/operation.html (2540 words)

	recoil-operated - Search Results - MSN Encarta
		- using recoil to operate gun mechanism: using the movement caused by the recoil of a firearm to operate part of its mechanism
		In non-recoil-operated firearms, it is generally the entire firearm that recoils.
		Paul Mauser patented a recoil operated rifle in 1899, 45 years before the M1 Garrand was adopted as the first recoil operated main battle rifle by any army.
	encarta.msn.com /recoil-operated.html (156 words)

	HK MP5/10 (Site not responding. Last check: 2007-10-31)
		Operation and functioning principles of the MP5/10 are identical to that of the 9mm MP5.
		The safety/selector switch is easily accessible by right or left handed operators and does not require operators to change their firing grip to take the weapon off "safe".
		The combat proven recoil operation principle ensures excellent reliability under all conditions and surgical accuracy to ranges of 150 meters and beyond.
	remtek.com /arms/hk/mil/mp5/mp510/mp510.htm (751 words)

	CalendarHome.com - - Calendar Encyclopedia (Site not responding. Last check: 2007-10-31)
		The two major operation systems of modern automatic machine guns are gas operation (which uses the gas generated from the burning powder to cycle the action), or recoil operation (which uses the recoil generated from the ejecting bullet to cycle the action).
		A model of a typical entrenched German machine gunner in World War I. He is operating a Maxim gun, wearing a Stahlhelm and cuirass to protect him from shrapnel, and is behind rows of barbed wire and sandbags.
		The "Maxim gun" used the recoil power of the previously fired bullet to reload rather than being hand powered, enabling a much higher rate of fire than was possible using earlier designs.
	encyclopedia.calendarhome.com /cgi-bin/encyclopedia.pl?p=Machine_gun (4141 words)

	what is the advantages/disadvantages of rifle system? - THR (Site not responding. Last check: 2007-10-31)
		There is blowback operation and delayed recoil operation, but both operate off of recoil, or more precisely, the physic's concept of equal and opposite.
		They control recoil with a two-peice bolt which delays through inertia the transfer of recoil forces to a series of locking ball bearings until pressures are safe.
		Recoil operated in a rifle is when the barrel recoils backwards to unlock the bolt.
	www.thehighroad.org /showthread.php?t=225604 (1886 words)

	Beretta UGB25 Xcel Shotguns at Impact Guns Home
		The operating principle of the Beretta breakopen semiautomatic UGB25 Xcel is based on short recoil, which keeps the internal parts of the gun clean even after prolonged use.
		The short recoil and the low barrel axis position almost completely compensate for muzzle jump during firing, with quicker and easier re-alignment of the barrel on the target for the next shot.
		The two technopolymer recoil dampers of the breech bolt cushion its impact with the bottom of the receiver, reducing vibration and increasing the life of the gun.
	www.impactguns.com /store/beretta_ugb25.html (932 words)

	Principles of Firearms -- Operating Systems -- Short Recoil
		As with inertia operation, cycling energy comes from recoil forces, this time applied to both the free-moving barrel and bolt masses, rather than the bolt alone as in inertia arms.
		In recoil operation the bolt and barrel are locked together initially.
		In the most successful deceleration and acceleration short recoil designs, namely Browning's M1911 pistol and M2 machine gun, locking is accomplished by tipping the barrel or sliding a lock vertically in the bolt.
	www.rkba.org /guns/principles/operating-systems/short-recoil.html (529 words)

	[No title]
		The beauty of recoil operation is that much of energy that produces felt recoil is absorbed by the barrel, bolt, and carrier group as the weapon cycles.
		In recoil operated systems, bolt and carrier velocity play a critical role in not only felt recoil, but in extraction and ejection as well (too fast you get case head seperation, too slow and you get stovepiping).
		The final benefit of recoil operated systems is that the exhaust gasses can be used as part of the recoil management system.
	www.strategypage.com /militaryforums/29-1882.aspx (1810 words)

	G3 discussion - Insidious Creations
		Recoil energy comes partly from the change in cinetic energy inflicted on the bullet and partly from the propellant gases exiting the muzzle of the weapon.
		Instead, the vented gases are used to delay the release of the bolt which is cycled by the recoil force exercised on the bolt face by the cartridge itself; i.e.
		This mode of operation is called gas delayed blowback and it is very different from the gas piston operation of the FAL, AK and G36.
	insidiouscreations.net /forums/index.php?showtopic=166&hl= (3038 words)

	Beretta USA
		This would mean it would have to minimize recoil compared to traditional break-open shotguns but it would also have to break open like a double barrel to maintain the highest degree of safety.
		To further diminish recoil signature, the UGB25 Xcel also has two techno-polymer recoil dampers at the breech bolt that cushion the impact when a shell is fired.
		It is fitted with Beretta’s Gel Tek recoil pad that distributes recoil shock throughout the entire surface of the pad reducing felt recoil.
	www.berettausa.com /media/download.cfm?d_id=112 (698 words)

	Blowback Operated
		In recoil operation, the bolt and barrel are locked together until the bullet has left the barrel and most of the recoil thrust is spent.
		It uses recoil energy from the firing of a round of ammunition to operate the mechanism of the weapon and extract the fired case, eject it against spring tension, and return the mechanism to firing position again.
		This is based on the principle of operation that the recoil force exerted on the mechanism must overcome some form of mechanical disadvantage, momentarily holding the breechblock closed until the bullet had cleared the muzzle of the weapon.
	www.tpub.com /gunners/55.htm (719 words)

	NationMaster - Encyclopedia: Browning Model 1919 machine gun (Site not responding. Last check: 2007-10-31)
		The Browning.50 machine gun was used extensively as a vehicle weapon and for aircraft armament by the United States from the 1920s to the present day.
		The M2 is an air-cooled, belt-fed, machine gun that fires from a closed bolt, operated on the short recoil principle.
		The official designation for this weapon was Browning Machine Gun, Aircraft, Cal..50, M2 followed by either "Fixed" or Flexible" depending on whether the weapon was used as a fixed forward firing gun or for use by an airplane's crew, such as a waist gun position on a B-17.
	www.nationmaster.com /encyclopedia/Browning-Model-1919-machine-gun (1091 words)

	Blowback (arms) help - Wiki at Help.com (Site not responding. Last check: 2007-10-31)
		Blowback is a system in which automatic or semi-automatic firearms operate through the energy created by combustion in the chamber and bore acting directly on the bolt face through the cartridge.
		Other operating systems are recoil operation, gas-actuated, gatling and chain.
		It was later discovered that the bullet had left the barrel long before any locking could occur and that Savage pistols merely operated on a pure blowback basis; the rotation of the barrel might play a minor role by slowing the rearward motion of the slide as the slide cycled.
	www.help.com /wiki/Blowback_%28arms%29 (478 words)

	Section 4B
		Recoil lines originating from various locations on a demagnetization curve are plotted on the diagram to the right.
		Notice that the excursion of the operating point in recoil does not track exactly up and back along a unique line, but the very narrow loops that are plotted are always assumed to be lines for calculation purposes.
		For operation in recoil, it is the recoil line (rather than the demagnetization curve) and the load line which are the two characteristic equations describing a particular magnet in a particular magnetic circuit, the intercept between which gives a unique
	www.magnetweb.com /Sect4B.htm (758 words)

	Machine gun - RecipeFacts (Site not responding. Last check: 2007-10-31)
		The two major operation systems of modern automatic machine guns are gas operation (which uses the gas generated from the burning powder to cycle the action), or recoil operation (which uses the recoil generated from the ejecting bullet to cycle the action).
		A model of a typical entrenched German machine gunner in World War I. He is operating a Maxim gun, wearing a Stahlhelm and cuirass to protect him from shrapnel, and is behind rows of barbed wire and sandbags.
		The "Maxim gun" used the recoil energy of the previously fired bullet to reload rather than being hand powered, enabling a much higher rate of fire than was possible using earlier designs.
	www.recipeland.com /facts/Machine-guns (4073 words)

	Browning M2 .50 Caliber Machine Gun
		At the end of the first three-fourths of an inch of recoil, the bolt is unlocked, free to move to the rear independent of the barrel and barrel extension.
		During the recoil of 1 1/8 inches, the barrel buffer spring is compressed by the barrel extension shank, since the notch on the shank is engaged in the cross groove in the piston rod head.
		Part of the recoil energy of the bolt is stored by the driving spring rod assembly, and part is absorbed by the buffer disks in the backplate.
	www.inetres.com /gp/military/infantry/mg/M2.html (3792 words)

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