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  #51  
Old September 20th, 2005, 07:53 AM
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Default Re: Soviet tank crew survival.

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kevineduguay1 said:I like the idea of droping the crew survival on some Russian built tanks to 3. I don't think this will effect game play and will reduce the amount of full strength crew walking away from a brew up.
Erm, sorry to interrupt you, but the "survivability" rating you can tweak in MOBhack isn't directly related to the number of crewmen surviving. That should be something Andy already pointed out in a previous post. As far as I can understand it it mainly about the amount of damage an AFV can take once penetrated (the amount of overkill, so to speak) before blowing of. That's the *** you'll notice when you get a non-killing direct hit; it means that there's been some internal damage (one crew disabled, weapon destroyed, ammo reduced, immobilization...). Therefore reducing it on some units on account of risky internal layout will reduce the unit's ability to take heavy damage. As a side effect, it will indeed reduce the crew's surviving chances, but that's not the most of it.
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Im going to try some tests and see if this helps. Raising the Warhead size 1 or 2 values should not have to much effect on game play but could reduce crew survival.
Look, the WH size has an influence on many other parameters, like (least significantly) the impact sound and animation, the craterization of the ground, the actual armor penetration...
For one thing, it deals with all warhead types, HE and HEAT as well. Does the fact that a tank uses DU rounds gives him better HEDP rounds? IIRC it also deals with the reload speed and the actual in game ROF. Rise the WHsize and you'll end up with fewer shots on your dear Abrams...
Basically, for guns, the WH size is a translation of the caliber. Has the US army switched to the 140mm gun already?
You may try it of course, but I bet that the side effects will be a surprising overkill, at best. Given that a DU round has all these effects you described (and I don't see why a steel- or tungsten-based rod wouldn't behave more or less the same way, not even mentioning HEAT warheads), the best option IMO is to give it a better penetration, since the penetration overkill (i.e. total penetration available minus total armor encountered) will be one of the most preeminent factors in calculating the inner damage.
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  #52  
Old September 20th, 2005, 07:57 AM
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Default Re: Soviet tank crew survival.

Look, you can have penetration even 2000mm at 10km, but if projectile dont hit anything critical, tank will survive.Im telling that in M60 you have much better chance that penetrating hit will not hit critical parts than in T-72.I never said that T-62 is on pair with M60A3 with survivability. (As Andy said first M60 models had problems with flamable hydraulics,but after 1974 it was solved)
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  #53  
Old September 20th, 2005, 08:26 AM
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Default Re: Soviet tank crew survival.

Well, that makes for non-pentrating hits, this happens a lot. High-angled shots tend not to penetrate too (whatever your magic silver bullet, if you hit at 83° and have to cross 5 meters of equivalent RHA (that's with 600mm...).

Now about survivability, I think that things like flammable turret hydraulics fluids with internal tanks, or clumsy fuel tanks (think BMP-1 or M-113), maybe even aluminium armour should be integrated into the survivability rating, at lest for the worst cases. If that's posible at all with only 6 levels.
IMHO modern AFVs rise much too quickly to surv=6, which should be kept for targets with really high survivability and plenty of inner spaces like shelter bunkers or blue-water ships.
Just my opinion of course!
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  #54  
Old September 20th, 2005, 08:57 AM
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Default Re: Soviet tank crew survival.

"Look, you can have penetration even 2000mm at 10km, but if projectile dont hit anything critical, tank will survive."

Then, I am afraid, you have absolutely no idea of what you are speaking about.The projectile hitting something critical is just part of the equation (an important part but a part).Overpressure caused by something entering at massive speed into a sealed steel box is an other.Then there is heat and splinters to consider.


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  #55  
Old September 20th, 2005, 09:08 AM
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Default Re: Soviet tank crew survival.

Sorry,but you have. If you remember there was an accident in Iraq where Iraqi insurgents fired an RPG that penetrated side hull and goes out at other (one crewmember was wounded) HEAT jet goes at much greater speed than APFSDS (jet, not projectile) so by your means all crew should be dead, but they were not. Similar things happened to M113A3 when APFSDS rounds get through one side to other and out with no effect on M113... Examples are quite numerous.
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  #56  
Old September 20th, 2005, 09:32 AM
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Default Re: Soviet tank crew survival.

http://www.army-technology.com/contr...ion/apfsds.htm

"The terminal effect of the sub-projectile striking the target sees huge kinetic energy release. In miliseconds the sub-projectile punches through the target armour, instantaneously generating massive heat and pressure. As the long rod penetrator enters the vehicle friction with the armour plate creates burning incandescent spall which sprays the interior. The burning spall has an explosive effect"

That is a pretty good description of the Sabot damage mechanism.You can find more in others sources.

The M113 may have had its hatches open.That would lessen the effects considerably, giving pressure a way to vent out (very thin armor should mean less splinters as well).If not it might have still have survived maybe but I would have not wanted to be inside.RPG-7 vs Abrams is not an overpenetration, the mass of what got inside was probably very small.Try TOW-2 vs T-55 and tell me what happens to the crew inside.

By the way, I am still waiting for a source on

"99 percent of killed Iraqi tankers were those who served in T-72"
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  #57  
Old September 20th, 2005, 10:49 AM
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Default Re: Soviet tank crew survival.

It wasnt small. RPG hit side hull at place where was only a few cm protection.It got though whole hull side and exit at other side... It has definitly enough power. If this happen to T-72 whole tank will blow out.
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  #58  
Old September 20th, 2005, 11:54 AM
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Default Re: Soviet tank crew survival.

Hi, here is an article that may be of some interest to this discussion. I am not too sure where it stands on Soviet Survival though. It covers US concerns on armor survival in the future The cover of the article is attached above.




Iraq conflict raises doubts on FCS survivability

JOSHUA KUCERA JDW Staff Reporter
Washington, DC
Additional reporting by Ian Kemp JDW News Editor
London

The constant stream of casualties from close-range fire in Iraq has again raised questions that the US Army's future family of combat vehicles, which will rely on superior intelligence rather than thick armour, could be vulnerable.

The Future Combat Systems (FCS), a group of 18 networked land and air platforms, will be ill-equipped to handle threats like improvised explosive devices (IEDs) and rocket-propelled grenades (RPGs), some critics say.

The army's official line is that the network will give FCS-equipped units such a good understanding of the enemy's positions that they will be able to evade threats rather than needing thick armour to withstand hits. However, critics argue that danger can never completely be avoided and that soldiers could be unprotected in such lightly armoured vehicles. This view has gained currency after higher-than-expected casualties from IEDs and RPG attacks in Iraq.

"The network is not going to keep you alive," said one army official, who spoke on condition of anonymity. "The network is probably irrelevant once you make close contact with the enemy, and we're going to continue to make close contact because even [Iraqis], who are pretty unimpressive, have turned out to be sufficiently smart to rapidly reposition, adapt, evolve, and change in order to inflict damage on us."

One source with a major European armoured fighting vehicle manufacturer expressed scepticism to JDW about the reliance on information superiority to ensure the survivability of the FCS.

He noted that situational awareness is easier to achieve on the conventional battlefield with an enemy equipped with tanks and other vehicles but much more difficult during peace support operations or counter-insurgency operations when the enemy uses stealth tactics to blend into the civilian population. This is particularly true of military operations in urban terrain.

"It's a concern," acknowledged Maj John Chicoli, FCS assistant programme manager for system integration. "It's a change in culture, for the soldiers out there in the field, so we've got to demonstrate this and give them confidence that it will increase survivability."

Maj Chicoli said, the network, with information gathered from small unmanned aerial and ground vehicles and sensors that act as scouts, will minimise risk. "Our measure of success is never having a shot fired at us."

Within the army, Congress and the two prime contractors for FCS, Boeing and Science Applications International Corp, this optimism is waning, army officials and analysts say. "I think large numbers of Democrats and Republicans on the House Armed Services Committee are acutely sensitive to all of this, understand it very clearly and are trying to figure out what to do," the army official said, adding "if the people from Boeing who work on this talk to you honestly they tried to tell the people in the army from the very beginning that this will not work."

Boeing spokeswoman Maria McCullough responded that FCS vehicles would be "far less vulnerable to IEDs than any other armoured vehicle in their class" due to advanced technologies for armour protection and other active and passive countermeasures, the details of which they could not discuss.

Last year the army had to rush the production of slat armour kits for its Stryker 8 x 8 medium armoured vehicles in Iraq because of a greater-than-expected threat from RPGs (JDW 10 September 2003). Earlier this year the army issued guidelines for units improvising their own armour protection for unprotected variants of the High Mobility Multipurpose Wheeled Vehicle.

The debate echoes similar concerns raised about the survivability of the M2/M3 Bradley Fighting Vehicle in the mid-1980s.

In contrast the German Army believes that armour protection will be vital for future survivability across the range of military operations. The new Puma infantry fighting vehicle, scheduled to enter service in 2006, will have three different levels of armour protection that will increase the Puma's weight from 31.45 to 43 tonnes (JDW 3 September 2003).

With years of experience countering IEDs and RPGs the Israel Defence Force deploys a range of heavy armoured personnel carriers developed from main battle tank chassis.

Boeing officials said they are confident that, by the time the FCS is actually fielded, the technology would be good enough to protect the lightly armoured vehicles. "We're still in the infancy of this thing and there a lot of ways to look at it, like new materials engineering ... so I don't think we know right now," said Jeffery Worley, FCS programme director - business management.

A Congressional committee this month recommended cutting $250 million from the $3.2 billion FCS budget for 2005, calling it "excess to requirements".

Boeing and army officials said they were confident that most of that money would ultimately be restored, warning that if the full cut went through it would mean significant delays on engineering work for command, control, communications, computers, intelligence, surveillance and reconnaissance systems and manned ground vehicles.

"If the change is in the $100 million range, it will affect the schedule but I don't see it having a tremendous impact," Worley said. "If it gets much more than $100 million then we're talking about some serious schedule movement."
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File Type: jpg 381247-JDW M1a1 Burning.jpg (69.0 KB, 101 views)
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  #59  
Old September 20th, 2005, 01:40 PM
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Default Re: Soviet tank crew survival.

"RPG hit side hull at place where was only a few cm protection.

Side hull is a rolled steel plate presumably in the 8cm range.BUT in addition to that there is the side skirt.The round exploded against that.That means a non trivial standoff between where the warhead explodes and the side hull plate.That would help to dissipate the jet, ensuring that the side hull plate would not be hit at full force.

"It got though whole hull side and exit at other side... It has definitly enough power"

It made a small dent on the opposite side, but it did not penetrate that plate.It was a small, albeit surprisingly well focused for an RPG, HEAT jet.It could not cause the overpressure event you would get from a M829A1 crossing a tank side by side or from a TOW-2.The warhead was simply not that powerful in first place and it had to throught the side hull and the airgap before getting inside.
Yes an HEAT jet moves very fast but you have to consider the amount of stuff which is moving.At that point there was probably not enough of it to do more than damaging some systems in its direct path.

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  #60  
Old September 20th, 2005, 02:11 PM
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Default Re: Soviet tank crew survival.

"the network will give FCS-equipped units such a good understanding of the enemy's positions that they will be able to evade threats rather than needing thick armour to withstand hits."

"I cannot imagine any condition which would cause a ship to founder. I cannot conceive of any vital disaster happening to this vessel. Modern shipbuilding has gone beyond that."
Captain Edward John Smith


Nuff said.
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