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Milkor MGL operating principle

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Unread postAuthor: jrrdw » Mon Jan 05, 2009 12:03 pm

Having to wind up a spring in the heat of battle sounds terribly insufficient to me.
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Unread postAuthor: JDP12 » Mon Jan 05, 2009 12:04 pm

That could be it-oh!

Have you ever seen transformers? In it- they use the M32- and i recall i think they wound it up when it was closed. I'll have to watch the movie again but for some reason i think they did. That would make sense- because then all that would have to happen is the pin being retracted until it is all wound up, then reengaged.

That makes a lot more sense. Once I watch transformers- I'll let you know. But i think thats what they do
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 12:10 pm

jrrdw wrote:Having to wind up a spring in the heat of battle sounds terribly insufficient to me.


On the face of it, yes, however you do have six devastating 40mm rounds to let off before you need to reload, and besides, think of the M79 of the M203 and similar underbarrel grenade launchers, they have to be reloaded after every shot and are still considered to be viable battlefield weapons.
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Unread postAuthor: jrrdw » Mon Jan 05, 2009 12:11 pm

The movie would add or subtract effects to get a good looking effect instead of a real one. I'm sure there are military training video's on that exact piece somewhere for the watching. I didn't watch JSR's, dail-up internet connection here!
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Unread postAuthor: ALIHISGREAT » Mon Jan 05, 2009 12:18 pm

Hmm future weapons said it has a low pressure operating system so gas is probably out of the question...

so i would say recoil.
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 12:22 pm

ALIHISGREAT wrote:Hmm future weapons said it has a low pressure operating system so gas is probably out of the question...


In military terms, it's relatively low pressure:

The firing pin strikes the primer, whose flash ignites the propellant in the brass powder-charge cup inside the high-pressure chamber. The burning propellant produces 35,000 psi (2,461 kg/cm²) chamber pressure, which ruptures the brass powder-charge cup at the vent holes. This allows the gases to escape to the low-pressure chamber in the cartridge case, where the pressure drops to 3,000 psi (211 kg/cm²) and propels the grenade from the muzzle at a velocity of 250 fps (76 mps)


That's plenty to operate a recoil mechanism ;)
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Unread postAuthor: ALIHISGREAT » Mon Jan 05, 2009 12:29 pm

world.guns says its a spring:

The Milkor Mk.1 is a revolver type, hand-held grenade launcher. The six-shot cylinder is rotated by the clockwork-type spring for each shot. Spring is wound manually during the reloading. For reloading, the rear part of the frame (along with the pistol grip) is unlocked and then rotated sideways around the top strut of the frame, until the chambers in the cylinder are exposed for reloading. Once cylinder is reloaded, the rear part of the frame is rotated back and locked into position. The double-action firing mechanism has a manual safety above the pistol grip. All Mk.1 launchers are fitted with the red-dot type sight, with range scale. Modern versions, M.1S and Mk.1L, also can be fitted with other types of sighting equipment, using Picatinny rail on the top of the barrel. The top folding shoulder stock has a rubber recoil pad.
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 12:34 pm

ALIHISGREAT wrote:world.guns says its a spring


Already quoted, see the first page ;p
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Unread postAuthor: ALIHISGREAT » Mon Jan 05, 2009 12:36 pm

jackssmirkingrevenge wrote:
ALIHISGREAT wrote:world.guns says its a spring


Already quoted, see the first page ;p


My mistake, i must have skimmed over that bit :roll:
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Unread postAuthor: JDP12 » Mon Jan 05, 2009 4:23 pm

Well in Transformers- they show the reloading process and they show them winding up the spring when the grenade launcher is closed.

I do believe this is really how it works- and not winding it up when it is open for reloading
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 5:24 pm

In order to give you an idea of how the ratchet mechanism might work (and because I like taking things apart :D), I've taken apart the mag of my Mk.3 - quite a silly thing to do considering the tiny componest involved, and it was extremely fiddly to put it back together, so I hope you appreciate the effort ;p

The black arrow indicated where a bar presses when you work the bolt, unblocking the mag an allowing it to rotate one click.
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Unread postAuthor: JDP12 » Mon Jan 05, 2009 6:13 pm

Well JSR i certainly appreciate the effort and i see now- I assume then the magazine goes into the gun with the bar type facing up? And then some sort of bolt passes over it, forcing it to catch, then when it is removed it unlocks?

Is the magazine spring wound?
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 6:21 pm

There is a coil spring in the centre that tries to turn the wheel anticlockwise looking at the photo. At rest, the wheel is resting against the left tooth of the ratchet. A bar moved by the bolt when opened pushes the component up, the left tooth releases the wheel which turns until caught by the tooth on the right.

Closing the bolt returns the ratchet to its rest position being held by the tooth on the left once again.
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Unread postAuthor: JDP12 » Mon Jan 05, 2009 9:16 pm

so on the silver cylinder those little portrusions are what catch on the ratchet?
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 06, 2009 12:33 am

Yep, in the ratchet position on the photo the protrustion should be resting against the left tooth of the ratchet, the reason it isn't is that there's no tension from the spring as it's dismantled.
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