Patria AMOS: "Double Trouble, Mortar'd to Rubble..."

[slowmo21too]

Patria AMOS: “Double Trouble, Mortar’d to Rubble…”

(Polls are at the Bottom)

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Overview

Friends!

Today I want to suggest a interesting vehicle, a variant of the famous Patria AMV APC, equipped with the unique AMOS mortar system, a dual-barreled breech-mortar, capable of rapid, deadly direct and indirect fire.

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Basic Information

Designation: XA-361

Role: Self-Propelled Mortar System

Crew: 4

• Driver

• Commander

• Gunner

• Loader

Designer: Patria Hägglunds

Manufacturer: Patria Hägglunds

Total built: 18+

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Specifications

Dimensions:

• Length: 7.7 m (25 ft 3 in)*

• Width: 2.8 m (9 ft 2 in)*

• Height: 2.3 m (7 ft 7 in)*

( * ) - Some information based off standard Patria AMV

Driving Performance:

• Engine: DI 12 Scania Diesel Engine

  • 600 hp (450 kW)

• Maximum Speed: 100 km/h (62 mph)

• Maximum Range: 800 km (497 mi)

• Gross Weight: 26 tons (52,000 Ibs)

Armament:

• Main Armament: 2x 120mm AMOS Breech-Loaded Mortars

  • Fire Rate: 16 rds/min

  • Elevation: -3°/+85°

  • Ammunition: 48 Rounds
    

    
    
    

Additional Equipment:

• Smoke Grenades: 8x Smoke Grenades

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Usage In Battles

The Patria AMOS would be an interesting addition, having an advanced autoloader capable of spewing HE rounds and a rapid rate, able to overwhelm and overpressure any vehicle. Being a Patria, the vehicle would be a dangerous foe with its mobility.

Pros:

• Good Firerate

• Great Mobility

• Advanced Autoloader

Cons:

• Light Armor

• Lacks Armor Piercing Rounds

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History

In June 1996, Hägglunds Vehicle signed an agreement with the Finnish military to develop a new turret-mounted twin 120mm mortar system, designated the Advanced Mortar System, or AMOS.

Following the Breakup of the Company, development would continue, with BAE Hägglunds designing the turret while Patria Weapons Systems designing the Mortar system. Initially, 2 variants were created: Model A, which was a muzzle-loaded mortar, and Model B, the breech-loaded variant. Eventually, the Model A variant was abandoned, and the Model B would see full development, leading to the final design.

The first prototype would be completed in 1997, being displayed in june of that year. The AMOS would be mounted to various vehicles, from the swedish CV90, the XA-203, and the Patria AMV.

The Finnish Defense Force would place an order for 24 AMOS systems mounted onto the Patria AMV, later being reduced to 18 units, seeing delieveries from 2008 to 2009, and continues to see service to this day in the FDF.

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Photo Gallery

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Technical Drawings, Models, & Data

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Sources

AMOS - Wikipedia

AMOS, the real ‘mortar-under-armour’ - Dutch Defence Press

Army Guide

AMOS mortar system - Wikipedia, the free encyclopedia

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[Would you like to see this in-game?]

• Yes
• No

[How would you like to see this in-game?]

• Tech Tree
• Premium
• Event
• Battle Pass
• Squadron
• I Said No

[Where would you like to see this in-game?]

• 8.0
• 8.3
• 8.7
• 9.0
• 9.3
• 9.7
• 10.0
• Other (Explain in Comments)
• Again… No.

[Sea_Harrier_FRS1]

1st person here!
This Youtube shorts

Also +1 for this extra mortar thrower

[PlayedStatue626-live]

+1

[Sea_Harrier_FRS1]

I claimed this suggestion as my own

[PlayedStatue626-live]

Nuh uh

[Sea_Harrier_FRS1]

[Spr4yz]

Would love to know more about the ammunition that it uses. That would help a lot in imagining how it would perform and where in the tech tree it might sit.

[karnitin75]

AMOS has also successfully fired the Strix 120 mm terminally guided mortar bomb and the RUAG Land Systems 120 mm Mortar Cargo Bomb, which contains 32 grenades fitted with a HEAT warhead that will penetrate 70 mm of conventional steel armour. The grenades are fitted with a self-destruct mechanism.

Also conventional ammunition (high explosive, illumination, smoke and practice) from MECAR SA has been qualified for use in AMOS with extensive trials being carried out in 2004 to 2005.
Army Guide

[karnitin75]

This was all i found?

[AblativeKitten]

I might be miss remembering, but it should be the full complement of NATO 120mm mortar ammunition.

[Spr4yz]

Will check it out.

@AblativeKitten

I might be miss remembering, but it should be the full complement of NATO 120mm mortar ammunition.

Thanks, gonna see what interesting stuff I can find. Much easier to search knowing it’s NATO compatible 120mm.

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Edit: If it gets a round like the M933 or M934/A1 it could overpressure up to 37mm of armor (with 2.99 kg of Comp.B - 3.9 kg TNT equivalent). You can take out most heavy tanks in the game with a round like that, as long as you go for cupola shots or overpressure the hull roof.
The fact that you also get two shots means you are very likely to take out an enemy vehicle if you mess up the first shot.

Data sheet - M933

Source (also with M934/A1-rounds): https://www.bulletpicker.com/pdf/TM-43-0001-28-1994.pdf#page=514

[AblativeKitten]

you probably already know, but Nato 120mm mortar ammunition is not the same as Nato 120mm tank gun ammunition. (I have see people make that mistake before)

[Spr4yz]

Haha, yeah, I can see how someone would make that mistake. But yes, I’m making sure to distinguish the two :).

[Lovecraft2]

This is one of those vehicles that would benefit a lot from some sort of indirect fire mechanic. What’s the velocity and filler in those HE shells? I want this thing to have a drone. +1

[Spr4yz]

Most 120mm mortar shells have about 2.0 - 2.4 kg of TNT, but I did find some American ones that have 2.99 kg of Comp. B.

[Lovecraft2]

Ouch, thats not a lot. It would be a shame if this becomes another one of those modern vehicles put into 8.0 that stands out like a sore thumb because it can’t perform competitively. If the velocity wouldn’t be that fast (which im assuming not because it’s a mortar) and it got a drone, though. That would be a lot of fun.

[JamesPond1200-psn]

+1 with indirect fire sights of some sort. Direct fire wouldn’t be impossible, but it also wouldn’t be ideal.

[DMYEugen]

+1 I’ve had this conversation multiple times on the forums, however, for these mortar systems to be truly effective, they need to have access to the STRIX round, which features a HEAT warhead, giving the vehicle proper anti-armor capability. The M933 is great and all but it lacks proximity ability and thus versatility. M934 or M934A1 have a fuse capable of proximity detonation so either one of them would be better suited for War Thunder. Having said this, there is an even better option. The Swedish THOR 120mm mortar round has a TNT equivalent of 3.97kg with the option to fit an additional 1kg TNT blast charge for extra oomph. It also has proximity capabilities.

All of this is to say that the Swedish STIRX and THOR are the best options for ANY NATO 120mm mortar system that could be added to the game, regardless of nationality.

[Spr4yz]

Do we know if the STRIX can be used in direct-fire? All promotional material I’ve seen of it only talks about normal mortar use (fired in an arc).
Really interesting about the THOR-round! Do you remember where you got the information about the filler and extra 1kg charge?

[DMYEugen]

As long as it’s fitted with a stub-case, the AMOS is compatible with ALL NATO standard 120mm smoothbore mortar rounds and the 2008 AMOS brochure makes specific mention of smart ammunition being included.

Unfortunately, this is where we need to start taking more creative liberties. To even be used as intended, the STRIX needs to be manually programmed. That being said, there is no system preventing the round from simply being loaded and fired without said programming. Should it be used this way, it should, in theory, just fly like any other dumb mortar round. The warhead should also perform normally as it is designed to function on impact. All of this is possible in theory and I personally do not think direct-fire NATO mortars could properly survive in-game without the STRIX, especially if their Soviet counterparts were to be added. I understand if the STRIX appears unappealing because of this, however, I truly think it’s our best bet and is worth genuine consideration.

As for the THOR, my information come from an official Saab press release on the THOR. Seen below:

20170912-new-mortar-round-thor-to-be-launched-at-dsei-en-0-2666887.pdf

The filler is 3.40kg of PBXN-110, which appears to have a relative effectiveness of 1.17, which would give us 3.97kg of TNT equivalence. (Though if you ask Google’s AI, it’ll tell you 4.08kg with an RE factor of 1.2.) The type of explosive of the additional charge does not appear to be explicitly stated anywhere, however, TNT would be the bare minimum so that’s what I shared.