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Active Protection System (APS) for tanks


asaf
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   RPG rocket that was hit by Arena but did not detonated.

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   Assymetrical placement of radars - left ones are near gunner sight, right ones are mounted on top of turret "cheek". Also, rear storage box is now fully occupied by Arena subsystems, so strage boxes on the side were added.

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  • 2 weeks later...

   Stolen from otvaga, tankoff did a summary post on Arena systems.

 

   Arena (1993) patent:

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   1 are countermunitions in their launchers, placed around turret. 2 is radar station on top of the turret.

 

Spoiler

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   Same direction can be covered by 2 or even 3 countermunitions.

 

   Arena-M APS with correctable trajectory countermunitions:

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   Compared to previous version much less countermunitions and launchers are used, subsystems are more compact. Less weight, statistically less vulnerable to fragmentation damage.

 

Spoiler

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   Countermunition schematics. CM is connected to launcher with a wire, BTW.

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Spoiler

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   Patent for BMP-3 equipped with Arena, pic showing possible use of APS as a system to automatically turn turret of AFV in the direction from which AFV was shot at.

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   Looks like Arena was offered to Germans in 90s. Pics from Wehrtechnisches Symposium, 1995.

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Spoiler

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   One of first article about Arena, 1996.

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Spoiler

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   2012 - model of Arena-M (or Arena with correctable countermunitions) was shown.

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   At RAE-2013 T-72 with shown with similar system, but with some additional changes.

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Spoiler

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   Arena-E with correctable countermunitions, video by KBM.

 

Spoiler

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   Small boxes - receivers. Bigger ones - transmitters/radars. 3rd one is hardware module

 

 

50m detection range, minimal reaction time - 0.04s, same direction is covered by at least 2 countermunitions, can intercept incoming projectiles with speeds of 70 to 1000 m/s. Can work of 8 hours without stops, weight - up to 900kg.

   Laser sensors (same as on Shtora) can be part of Arena. APS can be intergrated into BMS.

 

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   Countermunition launch. Small holes just under cap/cover probably are impulse jets to rotate countermunition after launch.

 

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   Upper schematics proably shows those impulse jets.

 

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   Launch.

 

Spoiler

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   Correction phase

 

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   Question if it is actually capable of intercepting top attack threats in configurations shown to public is still open. Max detection range is 50 meters, but how much radars can see "up" is question that i don't know answer for. Vertically aimed launchers suggest that at least ATGM that "overfly" target (like Bill 2 or TOW-2B) are covered by modernised system. Original Arena (at least in 1995 config) was not capable of intercepting overfly ATGMs.   

   Another question without answer is how much "correction" measures can change facing of countermunition. 

 

   Against top attack threats there were ideas to place CMs nearly horizontaly and aim them upwards.

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19 hours ago, LoooSeR said:

   Question if it is actually capable of intercepting top attack threats in configurations shown to public is still open. Max detection range is 50 meters, but how much radars can see "up" is question that i don't know answer for. Vertically aimed launchers suggest that at least ATGM that "overfly" target (like Bill 2 or TOW-2B) are covered by modernised system. Original Arena (at least in 1995 config) was not capable of intercepting overfly ATGMs.   

Firstly, great post. Secondly, regarding overfly ATGMs - how high they can go relative to the tank? IIRC Those missiles carry EFP charges rather than HEAT charges and if I remeber correctly EFPs can be usually set-off at greater ranges than HEAT warheads. So if TOW-2B for example flies 1 meter higher it's probably inside the killng zone of the arena-m, But is it true for an height of 4 meters as well? That the interesting question.

Another thing is the senors, I gather both arena version use an RF senosr suite (aka radar), we know that the two prominent western APS systems which are trophy and iron fist are based on AESA radars (lately even intergrated with EO sensors). Do we know how modern Arena-M's sensor suite is? I guess there's a reason for the other systems to go as modern as they can get.

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3 hours ago, Reta said:

Secondly, regarding overfly ATGMs - how high they can go relative to the tank? 

   1-2 meters in case of Bill 2. Although it is no longer is service.

Bill-2

 

Bill-2-2

 

3 hours ago, Reta said:

Another thing is the senors, I gather both arena version use an RF senosr suite (aka radar), we know that the two prominent western APS systems which are trophy and iron fist are based on AESA radars (lately even intergrated with EO sensors). Do we know how modern Arena-M's sensor suite is? I guess there's a reason for the other systems to go as modern as they can get.

   They are not AESA, at least frontal ones, but i don't have exact information on radars of Arena.

 

   On early model, radar looks like had this vertical arc of detection:

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   Missile with OTA could probably be detected, but unlikely to be effectively engaged or even classified as valuable target by a system.

 

   Arena-M, shown in latest episode of Military Acceptance, have at least side radars aimed slightly upwards:

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   Which may indicate better coverage against OTA ATGMs, maybe even top attack ones, but this is just a guess.

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8 hours ago, alanch90 said:

Same idea as ADS

 

Because at it's core it is the ADS.

Used to be called Shark (Système hard kill) and it's not exactly new

It is basically the ADS but with Thales built sensor and detonator.

Apart from adapting the system to the new Scorpion vehicles, I'm not sure if there is any difference with the old system (which was already presented on a VAB back in 2008)

 

https://www.defense.gouv.fr/dga/actualite-dga/2008/l-initiation-opto-pyrotechnique-une-rupture-technologique-dans-la-protection-active-des-vehicules-blindes

 

https://defense-update.com/20080701_eurosatory08_aps.html

 

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  • 1 month later...
  • 1 month later...

https://www.defensenews.com/land/2021/10/12/after-pumping-the-brakes-army-moves-to-field-iron-fist-protection-system-on-bradley/

 

The Iron Fist system has completed the majority of required testing, Brig. Gen. Glenn Dean, the program executive officer for Army ground combat systems, told Defense News in an interview before the Association of the U.S. Army’s annual expo.

“There’s a little bit left to go and then some integration work, but we’re essentially reaching the point where we’re just waiting for resources, whether Army or congressionally-provided, to proceed into procurement,” he said.

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