Armoured Vehicles Discussion Thread - Jan 12, 2012

All threads that are locked or marked for deletion will be moved to this forum. The topics will be cleared from this archive on the 1st and 16th of each month.
Post Reply
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

vina wrote:Now how is that that the Indian "Mil-Ind" complex had the necessary know how to produce a more "complex barrel" than the simpler and cheaper smooth bore and went ahead to produce it,
Vina, I thought you will never ask. :mrgreen:

Why dont you find out and tell us? :wink: Why DRDO needs time to make a Smoothbore, after all, according to you making smooth bore is so simple if you know how to make rifled guns. So why is DRDO waiting to make a smooth bore and cant make one at the drop of a hat now that it has decided to make one?

Come on you can do it.
Sanku wrote:You may not know, but I was probably the first on the forum to predict that Arjun will move to smooth-bores, and why. And this was much (2 years?) before the news came out
:rotfl: :rotfl: . What news , and where ? The bins along with the Mayan prophesy and Elvis Born Again and Coming of the Messiah kind of predictions!
Ignorance is not a PoV.


[/quote]
Of course, but then GSQRs were primarily written in 70s, by which the clear advantages of smooth bores were not fully understood all over the world. Also the GSQRs were closely on lines of "previous and old" experience with British tanks which were rifled. (added later --> ok before you jump on me again, the tanks were not rifled, their gun barrels were)
including a biggie of change in gun spec from 105mm to 120mm , and no change in reqmt to smooth bore! [/quote]

And in which year was change wise one ? Not 70s?

You know, tomfoolery is no replacement for knowing the facts.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

Eric Leiderman wrote:Read a report by an Isreaili tank commander, about 2 years back, in which he talks of the Arjun gun, To paraphrase what he says fm memory.
It looks like the indians hit gold with the gun its penetrating power is phenominal ,It went clean through 2 + tanks, he has not seen a gun as good as this one yet.
He thought it was a fluke that we managed to produce the gun(I do not) I would think the rifiling has something to do with the penetrative properties of the shell. The blog spot of this guy was on BR, I cannot find the link.
There are fundamental issues with the above, the primary penetration made by a tank AFSPDS. Now a AFSPDS performance is only degraded by rifling, even with a slip ring. This is very basic physics of rounds or engineering of types of gun.

Arjun gun has good penetration because of a number of factors
Overall longer round
A well stablized gun
Excellent targeting mechanics

But unfortunately NOT because of rifling.

Also what do you mean that the gun shot penetrated 2+ tanks? Its not quite clear, also if you can find out, please post the link, because it is certainly not quite clear from you
chetak
BRF Oldie
Posts: 35016
Joined: 16 May 2008 12:00

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by chetak »

Sanku wrote:
Eric Leiderman wrote:Read a report by an Isreaili tank commander, about 2 years back, in which he talks of the Arjun gun, To paraphrase what he says fm memory.
It looks like the indians hit gold with the gun its penetrating power is phenominal ,It went clean through 2 + tanks, he has not seen a gun as good as this one yet.
He thought it was a fluke that we managed to produce the gun(I do not) I would think the rifiling has something to do with the penetrative properties of the shell. The blog spot of this guy was on BR, I cannot find the link.
There are fundamental issues with the above, the primary penetration made by a tank AFSPDS. Now a AFSPDS performance is only degraded by rifling, even with a slip ring. This is very basic physics of rounds or engineering of types of gun.

Arjun gun has good penetration because of a number of factors
Overall longer round
A well stablized gun
Excellent targeting mechanics

But unfortunately NOT because of rifling.

Also what do you mean that the gun shot penetrated 2+ tanks? Its not quite clear, also if you can find out, please post the link, because it is certainly not quite clear from you

Shouldn't that be APFSDS, sirjee? :)
Mihir
BR Mainsite Crew
Posts: 882
Joined: 14 Nov 2004 21:26

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Mihir »

The CONTEXT of the discussion makes that obvious, doesn't it? :P

Also, seems we all learn something new everyday. My lesson for the day was:
Sanku wrote:Arjun gun has good penetration because of... A well stablized gun
Austin
BRF Oldie
Posts: 23387
Joined: 23 Jul 2000 11:31

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Austin »

Accuracy was a problem back then in the 80's when the FCS were not that great and rifle gun offered better accuracy at long ranges over smooth bore , now with most modern FCS and better stabalised gun it is not a problem for smooth bore.
d_berwal
BRFite
Posts: 513
Joined: 08 Dec 2006 14:08
Location: Jhonesburg

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by d_berwal »

Arjun Mk II Commander's Panoramic sight seems to be from Sagem, model MPS (my 2 cents based on the glimpse of it in defexpo video)
vina
BRF Oldie
Posts: 6046
Joined: 11 May 2005 06:56
Location: Doing Nijikaran, Udharikaran and Baazarikaran to Commies and Assorted Leftists

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by vina »

Austin wrote:Accuracy was a problem back then in the 80's when the FCS were not that great and rifle gun offered better accuracy at long ranges over smooth bore , now with most modern FCS and better stabalised gun it is not a problem for smooth bore.
I do agree that stabilization and FCS have gotten better (the latter especially) . But that doesn't change the basic physics. Anything fired out of a smooth bore (unless it is a nice ball ,like fired out of the cannons you see in the museums) will need to be fin stabilized and that will mean 1) A sub caliber round in most cases and/or 2) A relatively thinner round with a tail (like a mortar shell) and it simply cannot fire a full caliber fat and short with ogival tip kind of conventional artillery, because if you did fire a conventional artillery kind of round (Without tail fins to stabilize , like a mortar shell) the round will tumble and end up with hitting the target Musharraf first, if at all it can get to the target and hit it in the first place!

The smooth bore is great for firing dart kind of weapons (APFSDS or in case of mortars, mortar shells). Darts are great in taking out other tanks, but lose out to conventional shells in all other roles , including HE-AT. Now , of course you can have some half way decent capability out of a smooth bore even to deliver HE and other as well , like the Israeli and other rounds are doing for their smooth bore tanks. They are just making the best out of what they have. But if given the multi role specs today and no threat of thousands of tanks thundering through the Fulda Gap, the chances are that the Germans and NATO too would probably not choose a smooth bore , if they were to start with a clean sheet.

The limited point I am making is that as long as your tank force is not geared purely for tank vs tank and nothing else roles, but you think the tank is going to be multi role (like role of the tanks in all the wars that India has fought until now), a smooth bore is definitely not the optimal choice. The Arjun's gun choice reflect that. Maharaj Ji's imaginations and hallucinations not withstanding, it is all about engineering choices on what you want it to do. In an earlier era, it was anti tank, now it is multirole
vina
BRF Oldie
Posts: 6046
Joined: 11 May 2005 06:56
Location: Doing Nijikaran, Udharikaran and Baazarikaran to Commies and Assorted Leftists

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by vina »

d_berwal wrote:Arjun Mk II Commander's Panoramic sight seems to be from Sagem, model MPS (my 2 cents based on the glimpse of it in defexpo video)
Nice.
chackojoseph
BRF Oldie
Posts: 4297
Joined: 01 Mar 2010 22:42
Location: From Frontier India
Contact:

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by chackojoseph »

vic
BRF Oldie
Posts: 2412
Joined: 19 May 2010 10:00

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by vic »

If smooth bore was so great, all Howziters/guns like 105mm, 155mm would have turned into smoothbore.
Singha
BRF Oldie
Posts: 66589
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Singha »

a kompromise soln is to mount two coaxial cannons per tank, like the Coalitza SP gun from Russia.
one is smoothbore, one is rifled to keep both camps happy.

they could even fire both simultaneously at the same target to do a ==. a HD 1080p camera to record who hit more and better.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

vic wrote:If smooth bore was so great, all Howziters/guns like 105mm, 155mm would have turned into smoothbore.
Why?

They are not main guns for front line MBTs.

====================
Darth Singha wrote:a kompromise soln is to mount two coaxial cannons per tank, like the Coalitza SP gun from Russia.
No doubt Singha Saar would also like to add, two independent missile launchers, 5 grenade throwers, and a plasma canon on it.

Then it might be worthy to bear his insignia even. :)
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

vina wrote:
Austin wrote:Accuracy was a problem back then in the 80's when the FCS were not that great and rifle gun offered better accuracy at long ranges over smooth bore , now with most modern FCS and better stabalised gun it is not a problem for smooth bore.
The limited point I am making is that as long as your tank force is not geared purely for tank vs tank and nothing else roles,
Simply incorrect. For short ranges, and in infantry support roles, smooth bores work just as well. Heck any numbers of infantry carried short range weapons (bazooka) were/are smooth bores.

Any number of tanks in the world, including the Abrahams/LeClerc/Lepoard/T-90s have effective ammunition for short-range (1-2 kms) of a variety of targets in troop support roles. There are tons of documentations to support the above. I posted TWO, but there are more.

Rifling becomes "better" than Smoothbore only when we consider indirect firing artillery role over long ranges. Something that India has not used its tanks for, neither intents to.

So while Vina might display both his ignorance and a foul mouth attacking attitude as a consequence, I believe he helps me make my points quite well.

=======================

Here is yet another example of a infantry carried smooth bore antimaterial weapon

http://www.steyr-aug.com/amr.htm
The 15.2 mm IWS 2000 is a heavyweight precision rifle designed as a relatively inexpensive system for the long-range attack of matériel such as light armored vehicles, aircraft on the ground, fuel and supply dumps, radar installations and similar targets. It can be dismantled into two units for pack carriage.
Prasad
BRF Oldie
Posts: 7812
Joined: 16 Nov 2007 00:53
Location: Chennai

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Prasad »

Whats wrong with outranging your opponents' main gun and engaging them from afar? Rather than getting into the <=2 km range and fighting on an even keel? Thats much better isnt it?
Austin
BRF Oldie
Posts: 23387
Joined: 23 Jul 2000 11:31

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Austin »

I am not sure if any one uses a Tank for indirect fire as the angle at which the tank gun can fire in such role are limited and if at all that too is possible , tanks support infantry in direct fire mode onlee.
Singha
BRF Oldie
Posts: 66589
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Singha »

the russian massed artillery barrages that preceded their 'shock army' attacks tended to use everything in the bag - heavy mortars, 75mm - XX mm, katyushas and tanks firing HE with barrels elevated.

I have a feeling tank barrels are not as a TFTA as field arty barrels on durability front (to keep it light) and hence using tanks as a 120mm SP arty firing HE-frag is not pursued by anyone now.

but my spider feel tells me the chinese are preparing a nasty surprise on that front...there is no compulsion of following the khan rulebook to make tanks very tank centric with APDS hype. one fine day 50 ZTZ99 loaded only with HE-frag with airburst fuses could 'suddenly' morph into SP guns and take us apart if we dont plan for it just by looking for "proper" SP guns like PLZ45 via surveillance assets.

just like the japanese ran rings around the allies in malaya, using bicycles to infiltrate jungles and plantations while the truck using allies could not move beyond the roads, the PRC is planning game changers...like using their ATV type things pulling light aluminium wagons of troops swiftly around instead of more conventional IFVs.

we better remember, (new) rules are written by winners, after the loser has gotten smacked.
Singha
BRF Oldie
Posts: 66589
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Singha »

Sanku, you can be commander and master of my Coalitza-MKI tank :) logo would be a black jaguar biting and crushing the neck of a snake.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

Singha wrote:Sanku, you can be commander and master of my Coalitza-MKI tank :) logo would be a black jaguar biting and crushing the neck of a snake.
I shall be honored Singha San. :)
vina
BRF Oldie
Posts: 6046
Joined: 11 May 2005 06:56
Location: Doing Nijikaran, Udharikaran and Baazarikaran to Commies and Assorted Leftists

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by vina »

I am not sure if any one uses a Tank for indirect fire as the angle at which the tank gun can fire in such role are limited and if at all that too is possible , tanks support infantry in direct fire mode onlee
Of course, tank guns are direct fire weapons like the field guns ( for eg, the 105mm Indian Field Gun, a superb weapon by all accounts) and will rarely provide indirect fire.

Funnily enough, the instances of it doing so in S.Africa is from the Maharaj Ji's own referenced book (oh, and whatever I say supports all that he has said.. :lol: :lol: ).

But even in direct fire mode, the rifled gun will deliver a heavier shell ,packing more explosives, more accurately ,with greater confidence (very necessary if you are providing fire support to make sure you dont do blue on blue) than what a smooth bore will do. If you really want plunging fire like say a mortar, than probably a merkava like mortar tube built in will be needed!

But like Prasad said, what if the opposition has Tow-2/Milan/Konkurs kind of thing which can reach out to 4 to 6 kms ? Either you call in artillery/air support or charge headlong into a barrage of missiles , if you cant take them out from stand off ranges!
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

Prasad wrote:Whats wrong with outranging your opponents' main gun and engaging them from afar? Rather than getting into the <=2 km range and fighting on an even keel? Thats much better isnt it?
Well this discussion was more in tune with non tank killing functions of MBT main gun. For tank hunting ops, APFSDS are now distinctly the better solution, and therefore are a "line of sight weapon", a lofted HE shell is not a good tank killing round since do not penetrate the armor, the chemical effect is not sufficient to hurt tanks, unless its very massive (a full HE barrage) or tank gets hit along with fuel tanks mounted.

The line of sight weapons, are all about target acquisition and tracking, velocity of round, penetration, counter measure avoidance etc. None of these are possible or make sense for lofted rounds.
Austin
BRF Oldie
Posts: 23387
Joined: 23 Jul 2000 11:31

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Austin »

vina wrote:But like Prasad said, what if the opposition has Tow-2/Milan/Konkurs kind of thing which can reach out to 4 to 6 kms ? Either you call in artillery/air support or charge headlong into a barrage of missiles , if you cant take them out from stand off ranges!
I doubt any tank gun can effectively deal with targets at 4-6 km even if its rifled gun with hesh rounds , at those ranges the shell accuracy will drop off quickly unless one is using tube launched missile with HE-FRAG like Lahat

On the Rifled Gun versus Smoon Gun debate , i read on Tank Net that in an internal competition between Western NATO tanks which is Chally 2 and Leo 2 , the latter with smooth bore wins in range and accuracy over the former with rifled gun.

But i think with Arjun since it already has good Rifled Gun and it makes sense to continue with it Mk2 to reduce induction time they can continue using rifled gun which does the job and with the new FMBT they are any way moving over to Smooth Bore as per disclosed information.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

vina wrote: But even in direct fire mode, the rifled gun will deliver a heavier shell ,packing more explosives, more accurately ,with greater confidence (very necessary if you are providing fire support to make sure you dont do blue on blue) than what a smooth bore will do.
Untrue again, around 2 kms range, the smooth bores are as good, if not better than rifled for a variety of purposes. We have just seen a case of infantry support weapon which chose to be smooth bore for greater penetration with greater accuracy.

Vina is making a very uni-dimensional argument that the amount of explosive is the only factor of usefulness of a shell. That is not true. As has been shown with references before, there are any number of applications where a range of shell types with different characteristics play a role.

In any case, if the task is to take out anti-tank nests at long ranges, tanks are in any case not the right platform irrespective of the gun they carry. Target acquisition of small hidden infantry groups is not what they can do stand alone anyway. They will need supporting imech-nfantry/uav feed/or any other such extra pairs of eyes. This is true for ANY gun they carry.

Thus cleaning a anti-tank screen at long ranges is something which goes far beyond the choice of guns. And if a smooth bore fitted tank has to fire a long ranges, "barrel fired missiles" is a much better solution.

In reality, this task is best done by BMPs, mortars carriers and other such support elements (again the range of the gun is quite redundant for a tank if they cant find the target)

In fact an exactly same situation happened in WW II, the Germans in their quest for TFTA tanks went overboard with the Tigers et al, only to find that the bulky monsters could hardly use their guns at the ranges they were supposed to work best at, and most battles happened at short ranges anyway. (and this for the flat lands of plains of France)

So "bigger is better" is not necessarily true. Smarter is better.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

Austin wrote: But i think with Arjun since it already has good Rifled Gun and it makes sense to continue with it Mk2 to reduce induction time they can continue using rifled gun which does the job and with the new FMBT they are any way moving over to Smooth Bore as per disclosed information.
Well for sure, as the Smooth gun gets ready, it will first move to Arjun to prove the gun and also try different tank design ideas.

There is no other way to FMBT but incrementally improve Arjun. (Autoloading smooth bores to drop weight, ERA, shape tweaks etc etc)
Prasad
BRF Oldie
Posts: 7812
Joined: 16 Nov 2007 00:53
Location: Chennai

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Prasad »

So the only way to increase kill range in a tank is to fire missiles and forget about AP rounds. Or get firepower from somewhere else. Like a Nag carrier to get out in front and blow the opposing tank squadron with a flurry of Nags. Now that is something I'd like to see. Intermixed with a tank squadron we get a few nag carriers and engaging the enemy tanks at a greater distance. and hang back and let the arjuns move forward and mow the rest of them down. Fancy I suppose.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

^^^ Thats a lot like Vivek's scenario.
alexis
BRFite
Posts: 469
Joined: 13 Oct 2004 22:14
Contact:

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by alexis »

nachiket wrote:
alexis wrote: Against tanks, smoothbore (AFPDS/HEAT) is a better (cheaper) weapon
I don't know what you mean by this exactly.
A smoothbore gun is simpler, cheaper and more durable compared to a rifled one. That was what i was saying. If there is an option to fire HESH rounds from a smoothbore cannon, we may be able to combine best of both worlds.
vina
BRF Oldie
Posts: 6046
Joined: 11 May 2005 06:56
Location: Doing Nijikaran, Udharikaran and Baazarikaran to Commies and Assorted Leftists

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by vina »

Prasad wrote:So the only way to increase kill range in a tank is to fire missiles and forget about AP rounds. Or get firepower from somewhere else. Like a Nag carrier to get out in front and blow the opposing tank squadron with a flurry of Nags. Now that is something I'd like to see. Intermixed with a tank squadron we get a few nag carriers and engaging the enemy tanks at a greater distance. and hang back and let the arjuns move forward and mow the rest of them down. Fancy I suppose.
Indeed. The best way to take out enemy tanks is to use airpower or other stand off weapons like a Nag carrier . That is how the helicopter gunship came into being and became so successful. The experience of WW-II (Hawker Typhoon tank killers, IL-2 "Sturmovik" and of course dedicated coldwar planes like the A-10, Su-25 and later Apaches) and later will make mince meat of an armored column if given half a chance (as the IAF hunters did to the Pakis in 1971) . So in some ways in the anti tank role the MBT is antediluvian /outdated.

So if the primary /best method of taking out enemy tanks is airpower, why should a tank be optimized for throwing darts at other tanks at less than 2km range? Oh well, Maharaj will come tie himself into knots into trying to answer that, but will still come out and say "smooth bore" :rotfl: :rotfl: and that whatever I write "supports" his assertion!
I doubt any tank gun can effectively deal with targets at 4-6 km even if its rifled gun with hesh rounds , at those ranges the shell accuracy will drop off quickly unless one is using tube launched missile with HE-FRAG like Lahat
It really is NOT a smooth bore vs rifle debate, but a far more profound debate, rather missile vs guns. Look what happened in Naval warfare. The gun was the primary weapon for centuries, with it's development reaching it's apex in WW-II with battleship guns of 16, 18 even maybe 22 inches (Yamato 's ?), field guns which fired something like 4 tons of weight in shells in a full salvo to some 25/30 mile distance , so that it needed to correct for the curvature of the earth for accuracy! The guided missile made it obsolete and now the gun is just a small "appendage" in front, and the ships itself are radically different, with anti ship and anti air taken over by missiles!

If you think such a scenario has come about in land warfare, the tank will sport some 10 VLS anti tank/anti heli Nag kind of tubes for anti tank , with the "gun" being something like a Bushmaster autocannon at best for anti infantry /close in work! A slightly more armored Nag carrier is the New MBT! It makes no sense to mount a 120mm whatever gun with that weight and space and armor to throw darts at another tank!

So what is the catch here ? Problem is that helicopter/missiles/airpower are very good at messing up the opposition, but fail at what is the core of a tanks mission which is "To Take Ground and Hold Ground" . Airpower etc, cannot Hold ground. There is no substitute for the tank for that and it's staying power.

And if you are looking at staying power, there is no substitute for tube artillery. Missiles are orders of magnitude more expensive, limited in quantity and dont work in such kind of situations.

Think back to what happened to the surviving WW-II Battleships, what are they used for currently (the ones still left). Shore battery support! If you want to pummel a target repeatedly, there is nothing quite like guns. So yeah, while at 6 to 7 km range, a HESH/HE/ spin stabilized round will find it difficult to take out a moving target and will require a guided missile, to pummel a stationary target, fortification , nothing like it!.

Now if that is what the tank's role is going to be like, rather than shoot darts at opposing tanks primarily (a role taken over by heli/ air power/missile), would you rather have a smooth bore or a rifled weapon that is far more accurate and deliver more ammo ?

So, really if the IA is going to look at a FMBT with a target weight of 25 /30 tons, it will go the missile way , with a very small tank, with Nag VLS tubes, a 700hp engine, a bush master cannon and no inability of the main gun to engage opposite MBT armor, but ability to take a few hits, unlike the infantry combat vehicle, because of heavier armor. The evolution that happened in sea has to happen in land as well I think.

This is fundamentally different from the tank philosophy since WW-II when the primary weapon was big enough to take out enemy armor. Well, now the primary weapon will be a missile , and the gun is just an "appendage".

So, Maharaj Ji's "smooth bore is future" doesn't compute as Mr Spock would say. Oh yeah, the Nag VLS tube will be smooth bore of course, but even the autocannon will be rifled only.

JM and all the rest of it applies as usual.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

Vina, I never said smooth bore is the future, I only said it is the present and will remain so for all times we can see (as of now). Big difference in the two.
krishnan
BRF Oldie
Posts: 7342
Joined: 07 Oct 2005 12:58
Location: 13° 04' N , 80° 17' E

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by krishnan »

I only said it is the present and will remain so for all times we can see
sorry to ask but can you explain how is this difference from saying it is the future.....you mean to say something else will come which will be better than either of the gun type ?
koti
BRFite
Posts: 1118
Joined: 09 Jul 2009 22:06
Location: Hyderabad, India

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by koti »

vina wrote:So if the primary /best method of taking out enemy tanks is airpower, why should a tank be optimized for throwing darts at other tanks at less than 2km range? Oh well, Maharaj will come tie himself into knots into trying to answer that, but will still come out and say "smooth bore" and that whatever I write "supports" his assertion!
I can't agree here saab.
Given the level of AAA-SAM integration into the armored formations in our vicinity, it is next to impossible to pull off what US did in Iraq. Both the PA and PLA have very credible Anti air assets in their attacking/ defending columns. Though Stand off Anti tank will be useful, it will not be comprehensive enough to depend on it. A good Tank gun is as valid today as it is during gulf war or 71 or WWII.

Again, as long as Rifled gun proves to be more accurate, there is no need to switch to smooth bore in the current scenario.
rohitvats
BR Mainsite Crew
Posts: 7831
Joined: 08 Sep 2005 18:24
Location: Jatland

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by rohitvats »

^^^What AD assets does the PA have?
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

krishnan wrote:
I only said it is the present and will remain so for all times we can see
sorry to ask but can you explain how is this difference from saying it is the future.....you mean to say something else will come which will be better than either of the gun type ?
Something like that. As the battlefield evolves, arms and ammunition change. The current standardization on smooth bores world over is essentially a result of experience over last 20-30 years.

However, yet no full scale war between two similarly modern armed sides has been fought. If such a war happens, it should be instructive in getting a real picture of how the new technologies play out (ERA/long range anti-tank missiles, counter measures etc) -- we will know for real if all the models that were exercised in the past, still hold.

Maybe a tank gun would lose its importance, in favor of missile? May be it will go back to heavy armor and short range weapons. Who knows?
Singha
BRF Oldie
Posts: 66589
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Singha »

I believe in the first gulf war (desert storm) there were some engagements where combined forces of bradley and apache helicopters both with TOW (and the bradleys with bushmaster cannons also) managed to rout some iraqi formations without the presence of tanks to take the lead. TOWs being wire guided, there were problems of wires crossing each other and fouling up things - not a issue now with radio command links.

cant recall the exact details now.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

koti wrote: Again, as long as Rifled gun proves to be more accurate, there is no need to switch to smooth bore in the current scenario.
A rifled gun will be *always* less accurate than a "corresponding" smoothbore for the majority of the munitions that are used on the modern MBT. Certainly not for APFSDS.

That and a host of other issues --> there was a good reason why rifling was abandoned the world over (for main gun of an MBT)
nachiket
Forum Moderator
Posts: 9207
Joined: 02 Dec 2008 10:49

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by nachiket »

Sanku wrote:
A rifled gun will be *always* less accurate than a "corresponding" smoothbore for the majority of the munitions that are used on the modern MBT. Certainly not for APFSDS.
Er..that's not true. The only disadvantage is that the rifling can wear out quicker if most of the rounds used are APFSDS and not HESH. There is no reason for a rifled gun to be less accurate for APFSDS.
koti
BRFite
Posts: 1118
Joined: 09 Jul 2009 22:06
Location: Hyderabad, India

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by koti »

nachiket wrote:There is no reason for a rifled gun to be less accurate for APFSDS.
Rifled gun imparts less muzzle velocity for the APFSDS then smooth bore. Nothing else matters. Barrel life will not be an issue in most of the practical purposes.
sudeepj
BRFite
Posts: 1982
Joined: 27 Nov 2008 11:25

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by sudeepj »

Sanku wrote:
koti wrote: Again, as long as Rifled gun proves to be more accurate, there is no need to switch to smooth bore in the current scenario.
A rifled gun will be *always* less accurate than a "corresponding" smoothbore for the majority of the munitions that are used on the modern MBT. Certainly not for APFSDS.

That and a host of other issues --> there was a good reason why rifling was abandoned the world over (for main gun of an MBT)
What do you mean when you say "corresponding" smoothbore? What do you mean by "majority of the munitions", for e.g. can you list out the munitions that will be more accurate when using a smoothbore? Please be more precise in your statements.
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

nachiket wrote:
Sanku wrote:
A rifled gun will be *always* less accurate than a "corresponding" smoothbore for the majority of the munitions that are used on the modern MBT. Certainly not for APFSDS.
Er..that's not true. The only disadvantage is that the rifling can wear out quicker if most of the rounds used are APFSDS and not HESH. There is no reason for a rifled gun to be less accurate for APFSDS.
That is because a slip ring is not perfect, however well as it is made, it will necessarily add complications to the round and decrease the performance viz a viz a round which does not need a rotating collar.

Also smooth bores can achieve higher muzzle velocity for a corresponding (same level of tech) rifled gun. Velocity is a major factor in APFSDS (less flight time to target, and hence lower gravity trajectory drop issues)
Sanku
BRF Oldie
Posts: 12526
Joined: 23 Aug 2007 15:57
Location: Naaahhhh

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by Sanku »

sudeepj wrote: What do you mean when you say "corresponding" smoothbore?
Already discussed on previous page, but once more:

1. Same level of metallurgical tech (roughly speaking same manufacturers.
2. Same sabot round can be used (length, weight, aspect ratio, powder quantity etc)
3. Same stabilization tech.
4. Same acquisition and tracking system.
What do you mean by "majority of the munitions", for e.g. can you list out the munitions that will be more accurate when using a smoothbore? Please be more precise in your statements.
Please find a discussion on ammunition on the previous previous page, basically a variety of HE shells over 1-2 km range (HEAT etc)

BTW none of this is remotely new, most of these factors were well understood when the Western heavies starting with Leopard, started switching to Smoothbores in 70s/80s.
nachiket
Forum Moderator
Posts: 9207
Joined: 02 Dec 2008 10:49

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

Post by nachiket »

Sanku wrote: That is because a slip ring is not perfect, however well as it is made, it will necessarily add complications to the round and decrease the performance viz a viz a round which does not need a rotating collar.

Also smooth bores can achieve higher muzzle velocity for a corresponding (same level of tech) rifled gun. Velocity is a major factor in APFSDS (less flight time to target, and hence lower gravity trajectory drop issues)
We haven't seen that with the Arjun have we? Neither the Army nor the press (lifafa or otherwise) have ever suggested that the Arjun's gun was inaccurate at long ranges. Quite the opposite actually. Every other real and imagined problem with the tank has been endlessly played out in the media. In the absence of any such evidence what exactly is your motivation for raking up issues in the Arjun that do not exist?
Post Reply