Poland orders 128 upgraded Leopard 2PL main battle tanks

[Oldman1]

Because they have bore evacuator or fume extractor as Penguin calls it. If you had read the links.....

I didn't ask.

 

[Audio]

I didn't ask.

What? I think we have some sort of misunderstanding here.

I said to you, i think that MilSpec didn't ask for muzzle reference system explanation as none are to be found on the pics in this thread, except that my pic which i posted after his query and as a reply to you.

 

[Penguin]

Because they have bore evacuator or fume extractor as Penguin calls it. If you had read the links.....

Well, the purpose of a bore evacuator is not to reduce recoil. A muzzle brake is still commonly found on (SP) artillery.

See Muzzle brake - Wikipedia, the free encyclopedia

• Brakes and compensators also add length, diameter, and mass to the muzzle end of a firearm, where it most influences its handling and may interfere with accuracy as muzzle rise will occur when the brake is removed and shooting without the brake can throw off the strike of the round
• A serious tactical disadvantage of muzzle brakes on both small arms and artillery is that, depending on their designs, they may cause escaping gases to throw up dust and debris clouds that impair visibility and reveal one's position, not to mention posing a hazard to individuals without eye protection.

Most importantly:

• Another problem can occur when saboted ammunition is used as the sabot tends to break up inside the brake. The problem is particularly pronounced when armour-piercing fin-stabilized discarding-sabot (APFSDS) , a type of long-rod penetrator (LRP) are used. Since these APFSDS rounds are the most common armour-piercing ammunition currently, virtually no modern main battle tank guns have muzzle brakes.

 

[Oldman1]

What? I think we have some sort of misunderstanding here.

I said to you, i think that MilSpec didn't ask for muzzle reference system explanation as none are to be found on the pics in this thread, except that my pic which i posted after his query and as a reply to you.

Look at his posts.

 

[Audio]

Well, the purpose of a bore evacuator is not to reduce recoil. A muzzle brake is still commonly found on (SP) artillery.

See Muzzle brake - Wikipedia, the free encyclopedia

err....i thought it was pretty much the same, with aim of preventing gases flowing back to the crew compartment (could be wrong ofc) with added function of lowering recoil. As for SP having still muzzle brakes, iirc it has something to do with ammunition of modern tanks, something goes to shyte when some type of ammo is used with muzzle brakes. Oh and, iirc modern tank cannons have better recoils systems so they don't need muzzle brakes. Vaguely from memory of thread from worldoftanks.com

 

[MilSpec]

Well, the purpose of a bore evacuator is not to reduce recoil. A muzzle brake is still commonly found on (SP) artillery.

See Muzzle brake - Wikipedia, the free encyclopedia



Most importantly:

Thanks that explains it.

 

[Penguin]

err....i thought it was pretty much the same, with aim of preventing gases flowing back to the crew compartment (could be wrong ofc) with added function of lowering recoil. As for SP having still muzzle brakes, iirc it has something to do with ammunition of modern tanks, something goes to shyte when some type of ammo is used with muzzle brakes. Oh and, iirc modern tank cannons have better recoils systems so they don't need muzzle brakes. Vaguely from memory of thread from worldoftanks.com

No, a bore evacuator has nothing to do with recoil reduction, as fumes (remaining after charge combustion) are removed after the shot is fired. A muzzle break works during firing, using redirected muzzle blast to reduce recoil.

For tanks the main thing is the use of SABOT (subcaliber) ammo, which is incompatible with a muzzle break and which arty does not use (all full caliber ammo).

For arty the main thing is recoil reduction (long range requires more propellant charges, and therefor increases recoil and hinders accuracy).

The evacuator is a simple passive device. It consists of a ring of holes drilled into the barrel, surrounded by a cylindrical pressure reservoir. As the shell moves down the barrel during firing, it reaches a point where the base of the shell passes the set of holes. The high-pressure propellant gases in the barrel behind the shell blow into the pressure reservoir through these holes, charging it with gas. As the shell continues down the barrel the pressure begins to drop, and then suddenly returns to near atmospheric pressure as the shell leaves the barrel. During this process the high-pressure gas in the reservoir begins to blow back into the barrel. By aiming these holes forward, their exhaust causes the gases to be blown down and out of the barrel

Bore evacuator - Wikipedia, the free encyclopedia
That direction would actually increase recoil, if recoil were affected.

 

[Penguin]

The evacuator is a simple passive device. It consists of a ring of holes drilled into the barrel, surrounded by a cylindrical pressure reservoir. As the shell moves down the barrel during firing, it reaches a point where the base of the shell passes the set of holes. The high-pressure propellant gases in the barrel behind the shell blow into the pressure reservoir through these holes, charging it with gas. As the shell continues down the barrel the pressure begins to drop, and then suddenly returns to near atmospheric pressure as the shell leaves the barrel. During this process the high-pressure gas in the reservoir begins to blow back into the barrel. By aiming these holes forward, their exhaust causes the gases to be blown down and out of the barrel

Bore evacuator - Wikipedia, the free encyclopedia
That direction would actually increase recoil, if recoil were affected.

 

[BordoEnes]

Our Ex-Dutch A4's have planned upgrades, but it's been slow moving so far. Most are still A4NO:

I recall Turkey's Aselsan offering its Leopard2NG package to Norway.

 

[Penguin]

I recall Turkey's Aselsan offering its Leopard2NG package to Norway.

Other offers could come from:

IBD Deisenroth Engineering , with Leopard 2A4 Evolution / AMAP (see Sweden Strv 122B/B+/C)

Rheinmetall, with MBT Revolution

RUAG Land Systems Ltd. with Leopard 2 MLU

Aselsan Leo2NG a.k.a. Leo2T