why can revolver use DA only unless you pull the hammer to rear?

[efeng9622]

I have a S & W model 67, it is a Double /Single action both revolver, when I shoot it , all shots will are DA unless I pull the hammer to the rear and pull trigger. then I can use SA. I don’t know if most revolvers just like this? Because if I shoot a pistol, the first shot is DA , after that all shots will are SA. I don’t understand what the reason is.


Thanks!

 

[Guzzizzit]

Simple. With a revolver there is no mechanism for the recoil to cock the hammer. On an automatic pistol, the recoil forces the slide rearward and to cock the hammer for the second shot.

so yes, the only way to shoot a revolver single action is to cock the hammer between shots.

 

[Ron James]

I'm sorry, but this can't be a serious post. Some one is trying to make funny.

 

[Dr.Who]

remember..... the only dumb question is the one not asked.....:banghead:

 

[logical]

I'm sorry, but this can't be a serious post. Some one is trying to make funny.

It is not inconsistent with earlier posts....I vote serious.

 

[efeng9622]

I don’t understand Ron James’s mean. I really have no much knowledges about revolver and just asked a question which I like know, I hope in future the revolver can cock the hammer by mechanical method instead of using recoil. My question itself maybe is dumb, but I didn’t try to make funny.

Thanks!

 

[azredhawk44]

Efang:

You have to harness either the recoil energy or the gases created during shooting in order to cock a gun for an easy SA follow up shot, or you have to provide that energy yourself in the form of a DA trigger pull. You never get something for nothing.

There is an automatic revolver out there, called the Mateba.
http://en.wikipedia.org/wiki/Mateba_Autorevolver

I believe it uses a gas system to cock the hammer and advance the cylinder, using the gas pressure from the previous round fired.

 

[tube_ee]

Why??

I hope in future the revolver can cock the hammer by mechanical method instead of using recoil.

This has been done a couple of times. The solutions were all uglier than the problem. It's simply not needed. For semi-rapid fire, double action works well. For aimed slow fire, that's why they can be shot in the single action mode.

There isn't a significant speed difference for most shooters when shooting service-caliber wheelguns vs. autoloaders. Recoil recovery time dominates any measurable difference in action speed. The autoloader's advantage is in magazine capacity, not speed of fire. Yes, it's mechanically faster, but that difference isn't big, and doesn't matter much when the gun's in your hand.

Making a recoil or gas-cocked revolver is a solution in search of a problem, which is why the attempts to do so have been engineering abortions, and why nobody buys them.

--Shannon

 

[Trebor]

With a revolver the mechanism is totally powered by the springs in the gun. You can "dry-fire" a revolver in double-action mode by just pulling the trigger to cock and then release the hammer. There is no need to use any of the energy of the cartridge to make the mechanism work. That is actually the advantage of the revolver. If the round is bad, just pull the trigger, and the next round will come under the hammer ready to fire.

 

[kmrcstintn]

c'mon guys...cut him some slack...have we forgotten that at one time we were also newbies and still cuttin' our teeth before we became 'almighty experts' :banghead:

basically, a semiauto uses the recoil from the previous shot to drive the slide back, cock the hammer, eject the empty shell, and load the next cartridge into the chamber on the barrel

revolvers (double action) have to be manually cocked since there are no mechanisms to perform this task*; manually pulling back the hammer locks the hammer in the cocked position and rotates the cylinder to align a cartridge with the barrel--slightly pull the trigger, the hammer goes forward, and the projectile is shot out the barrel;

with the hammer forward--pulling the trigger rotates the cylinder to align a cartridge with the barrel and makes the hammer go rearward enough to go forward with enough force to ignite the cartridge and the projectile is shot out the barrel

* there are/were 2 models/brands of revolvers that were hybrids and had mechanisms to 'cock' the hammer after firing...one was called the Mateba (a relatively modern design) and there was a variant of an loder British service revolver...I can't remember what it is called...

 

[bigmike45]

Since when did asking a question become "not serious" or "making a funny" about something we take for granted, because we know?? I teach safety to people who are just entering the construction industry and one of the first things I teach is that there is no "dumb or stupid" question and that all questions should be asked, especially if the trainee is less than 100% sure of their understanding of a topic.

We need to be careful here and answer ALL questions asked here even if we think they might be "a funny". This is a great forum and though it has been given a great deal of "attaboys" all it takes is one "oh s__t" to change it's reputation.

bigmike45

 

[SDC]

Simple. With a revolver there is no mechanism for the recoil to cock the hammer. On an automatic pistol, the recoil forces the slide rearward and to cock the hammer for the second shot.

so yes, the only way to shoot a revolver single action is to cock the hammer between shots.

EXCEPT in the case of "automatic revolvers", like the Spanish Zulaica (finally found a pic; "Pistols, Revolvers, and Ammunition, by Josserand and Stevenson)), the Webley-Fosberry, and the Mateba; in these designs, the recoil is used to recock the hammer and advance the cylinder one chamber.

Zulaica:


Webley-Fosberry:


Mateba:

 

[Sistema1927]

Let me chime in here with the following:

If you never challenge the status quo, you never have technological advancement. Even though most of "us" know how revolvers work and take their operation for granted I am glad that others ask "why does it have to be that way?"

The "problem" with newcomers is that they don't know what can't be done. Isn't that great?

 

[Brian Williams]

I deleted a few wasted posts, we are always trying to teach the mis or uninformed,

Never to ridicule them, so that said;



A Revolver needs to be manually operated unless it is one of a certain few. For a double action revolver, you can either cock the hammer with your thumb or pull the trigger to cock it. When you cock it with your thumb, the only action the trigger will do is to fire the gun. When you cock it with the trigger, the trigger does a double action; 1, cocking the hammer, 2, releasing the hammer to fire the gun.

 

[Martini13]

A bit of Trivia

Sam Spade's Partner, Miles Archer, was killed with a Webley-Fosberry revolver in the Maltese Falcon.

 

[Guzzizzit]

EXCEPT in the case of "automatic revolvers", like the Spanish Zulaica (no pic, sorry), the Webley-Fosberry, and the Mateba; in these designs, the recoil is used to recock the hammer and advance the cylinder one chamber.

Webley-Fosberry:

Your right, Tho i did not know of the names specifically, i remember seeing these Auto/revolvers on a History Channel documentry. I didnt bring them up because they are not particularly common, and seeing as they are something of a hybrid, didnt see it neccissary to confuse the situation.

Thank you for the information.

Guzz

P.S. I wish some gun company would make a Repro of that Webley-Fosberry, It looks cool.