Talk:Direct impingement

message: I'm fairly certain that the animated .gif images on this page are specifically used to advertise against a Direct Impingement system so people would purchase that company's piston conversion systems. I feel that they should not be used in their current state on this page.
Reefstiz (talk) 03:40, 2 February 2012 (UTC)
thread_title: Current GIF Images

message: Direct Impingment refers to a gas system in which the gas from the bore acts directly on the piston face - with no expansion chamber.  The FAL rifle and the AK-47 are classified by weapon engineers and professional armourers as Direct Impingment.
The Bleed-off and Expansion system used by the M16 family of weapons is often refered to in marketing information as a Direct Gas system resulting in some confusion.  The gas is allowed to expand in a pressure vessel that includes the gas tube and the expansion area in the bolt. Excess gas is then bled off through gas vents located on the side of the bolt carrier and also when the gas tube separates from the gas key.
By comparison an FN Minimi used an Expansion system due to the small cup on the piston that allows for some gas expansion where other long stroke pistons have no expansion space and are thus refered to as Direct Imopingement.
The M60 machine gun uses an Expansion and Cut-off system where the gas expands in the regulator and when the piston cup moves the gas hole is closed off cutting off the flow of gas.
I will post the text book references shortly. Cheers, Colt Armourer 00:57, 17 January  2007 (UTC)
:You're incorrect.  There is a piston face on EVERY gas operated firearm in existence.  There is, by definition, also an expansion chamber.  True, the FIRST Browning machinegun had a 'flapper'that utilized the expanding high-pressure gas after it exhausted into the air (as with the 'gas trap' variety of operating systems, but all of these are obsolete.  This piston face can be in-line with the barrel as are the vast majority of them (the Colt Potato digger is an exception) but the BASIC operating principle of any gas operated weapon is that gas operates on a surface moving that surface.
:Direct Impingement Means that this gas operates DIRECTLY on the bolt and bolt carrier rather than through a piston rod, extension, or other such mechanical connecting rod.  The AK-47 is interesting in that the piston rod is a functional part of the bolt carrier being affixed albiet loosely sometimes.  The FAL, however, is different in that the piston rod is not attached to the bolt carrier. There are variations... The HK G36 utilizes a conical surface with a 'nipple' in the middle.  The Bang system utilizes a gas trap at the muzzle and a ring shaped 'piston'.  There are many variations.  The furthest from 'direct' one can cite is, I believe, the Colt Potato digger which utilizes a series of levers to operate the action.  Not sure what armorers call such things... I'm a student of the gun, not a mechanic. --Asams10 05:11, 17 January 2007 (UTC)
replies: text: You're citing the patent, eh?  So, what surface moves when the gas expands?  Do tell.  What part of the gun is being pushed by this impingement?  By the way, ignorant is not a personal attack, it's a fact.  You are ignorant of the facts.  You will learn by the numbers, recruit.  I will teach you. --Nukes4Tots (talk) 01:45, 18 October 2008 (UTC)

text: Listen person who ignores the facts, You can read and write all you want, but you didn't answer the one question that I asked.  Where does the gas impinge?  I've read Stoners Patnet.  The difference between you and I is a level of comprehension.  All gas operated systems impinge.  Stoners Patent says that it impinges on the bolt carrier.  Uh, how much simpler do you want it to be?  Please stop characterizing my use of the words Ignorant, Ignore, and Ignorance as personal attacks and read the actual meaning of them.  If you're taking it the wrong way, that'd be right along the lines of your interpretation of the patent. Please cite a source, again, that says that Stoner's system is not direct impingement. --Nukes4Tots (talk) 13:25, 18 October 2008 (UTC)
replies: text: Closed-minded one, you seem to be misinterpreting what you read.  Once again, I'll challenge you to provide a source that states in some substantive form that Direct impingement does not acceptably describe the Stoner system.  If you cannot, please go away. Please provide the source like this, "Joe-Bob Freebird says on page 17 of his book entitled 'Gas Operation for Dummies' that the M16 does not operate on the direct impingement principle." --Nukes4Tots (talk) 20:34, 20 October 2008 (UTC)
thread_title: Misidentified?

message: Could somebody please find a way to integrate this smoothly into the text? "The Swedish AG-42 Ljungman, used a simplified direct-impingement operating system." --Nukes4Tots (talk) 16:33, 7 September 2008 (UTC)
thread_title:  Swedish Rilfe 

message: This article seems to be a perfect example of undue weight to disparage DI rifles. There are 2 padded out paragraphs criticizing DI rifles that are filled with editorializing and weasel words. There are a lot of redundancies and poor writing. Those two paragraphs could easily be combined into one and shortened considerably.
Jamescart (talk) 06:05, 28 May 2016 (UTC)
thread_title:  Undue weight 

message: It is a simple illiteracy to say that A is lighter.
 
In the English language something has to be lighter than something else.  This article fails that test.
 
David Lloyd-Jones (talk) 19:37, 2 November 2016 (UTC)
thread_title:  Lighter Than What? 

message: This is an Action (firearms) topic and should be merged with that or deleted. Digitallymade (talk) 12:27, 3 March 2017 (UTC)
thread_title:  Suggesting merge into Action (firearms)