Do modern Tank gun has muzzle break?It is different from the ones in WW2?

No and yes. The modern gun does not have a muzzle brake so it differs a great deal. Modern hydraulic systems allow a gun to absorb more recoil so it isn't neccessary. Also, since tanks are heavier now, their weight also absorbs more recoil.

Rob

If the tank in WW2 do not have muzzle the tank gun will be easily damaged?
why?
how the muzzle break works?

Please let me correct you here - you made a very common error. This device is called "MUZZLE BRAKE". Not "break"! If there is a muzzle break, the gun is damaged

The word "brake" explains the mistery - this is designed in a way that part of expanding air/gas/smoke in the barrel is dissipated to the sides and even backwards, therefore "braking" the barrel and limiting its recoil. Without it all the gas leaves the gun moving forward, thus working almost as a jet exhaust pushing the gun backwards.

Rgds,
Pawel

one addition: older ww2 tanks do not have a muzzle brake, as tge recoil was not really that heavy, the guns where not really that powerfull either (why do you think the sherman could not cope with the heavier German tanks, except ofcourse the firefly, which did have a muzzle brake). The Jagdpanzer 4 didn have one because it was a rigid structure, which coped with the recoil, just as the Jagdtiger. The turret-tankswith heavy guns almost all had muzzlebrakes. It basicallly speaks for the power of the gun if there was no muzzlebrake.

muzzle brakes also have the side effect of reducing muzzle velocity,
hence why some AT guns didnt have them.
the early 88's didnt have them, but later models, pak43 etc had them to reduce recoil,
allowing a greater rate of fire. this was achived because the long barrels didnt vibrate as much after firing, because of the reduced recoil forces.

the above points about more effective recoil mounts in modern tanks are the main reason why most tanks nowadays dont have them.

cheers
joe

One other thing to add to the previous replies; the brake does increase the muzzle blast effect to the sides and rear - it does this as part of it's recoil reduction.

It also increases noise substantially. It would not be a good thing to be a supporting infantryman to close to frontal area of a Tiger, M48A, Panther, Pershing, IS3, etc. Model any dioramas accordingly.

And if you ever go to the rifle range and want some space to yourself, whip out your 8mm Hakim. The shooters at the benches to the left and right pack up their stuff and leave in very short order.

Most of todays tanks use bore evacuators. It's been 25 years for me, so what exactly does that do? Extracting the fumes out of the tube so they don't go back into the turret would be my guess.

Muzzle brakes and bore evacuators each serve a different purpose. Take a look at a howitzer like the M109 series. They have both the muzzle brake and bore evacuator. One to reduce the recoil and the other to reduce the amount of fumes re-entering the turret.

It actually has a channel that absorbs some of the air pressure into a loop that goes around for a second after the blast, then gets pushed back into the barrel. Since the breach is still sealed at this point, the air flows out the front of the tube and draws all the breach fumes with it. This is how it was explained to me.

Rob

If you look at a Stryker MGS fiiteed with the M68A1E4 105mm you will note it has a muzzle brake. The light vehicle chassis cannot absorb all the recail so the muzzle brake is needed to reduce the impact on the chassis.

MUZZLE BRAKE,
SABOT & BRO ABRAMS are both correct. case in point. Watch an arty piece like the M109. After it fires the big boom and flash are gone......the recoil has been reduced because of the brake, and a cple seconds later the gun gives a puff like a cigar.
That is the gases and fumes being expelled from the bore evacuator. Now wasn't that spaecial?? Todd

On the bore evacuator/fume extractor, here's 2 links that might help: http://63.99.108.76/ubb/Forum13/HTML/002368.html, http://63.99.108.76/ubb/Forum13/HTML/002204.html

On the muzzle brake: http://63.99.108.76/ubb/Forum13/HTML/002288.html, http://www.activevr.com/afv/muzzle.html