AHS Krab (K9PL) - Reforged through molting

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History

History

The later production variant of the AHS Krab emerged after the Polish Army and Huta Stalowa Wola abandoned the original UPG-NG chassis due to serious reliability and structural problems discovered during testing. Rather than cancelling the Regina program entirely, Poland chose to retain the successful elements of the vehicle,namely the British-derived AS-90M turret, 155 mm L/52 gun system, and domestic electronics suite, basically just keeping the turret, while replacing the chassis with South Korea’s proven K9 Thunder platform under a technology transfer agreement signed in 2014.

The chassis used for serial-production Krabs was not simply a standard Korean vehicle. Instead, Polish and Korean engineers developed a modified and partially localized configuration commonly referred to as PK9 or K9PL. While retaining the K9’s automotive layout, hydropneumatic suspension, powerpack arrangement, and proven mobility characteristics, the chassis was adapted to Polish military requirements and integrated with systems already developed for the Krab program.

The transition to the PK9/K9PL chassis marked a turning point for the AHS Kra*. The earlier domestic chassis had suffered from vareus different issues. The K9-derived platform resolved many of these deficiencies, allowing the Krab* o finally enter stable serial production and operational service. At the same time, Poland maintained a significant level of domestic industrial participation through the integration of Polish subsystems and gradual localization of production.

The later Krab variants on the PK9/K9PL chassis wered modified to meet the requirements of the Polish army, these upgrades including an Auxiliry Power unit, a fire and explosion protection system, a filtering and ventilation system, a new driver’s instrument cluster, and a communication system manufactured by WB Electronics.

The newest production batches introduced several visible external and survivability improvements. These vehicles received an additional set of four smoke grenade launchers, increasing the vehicle’s self-screening capability. They also suspected to incorporated a drone countermeasure / anti-UAV jamming system, reflecting the growing importance of unmanned aerial threats on the modern battlefield. Another notable addition was an extra auxiliary power unit (APU), improving the vehicle’s ability to operate onboard systems without relying solely on the main engine and increasing overall operational flexibility.

Initial batch

Initial batches only had 8 smoke grenades

Latest batch front

Latest batches features a new configuration with 6 smoke grenades at the front, and 6 on the top, totalling 12


Characteristics


Summarised Characteristics

Details
  • Crew (5)
    • Driver, gunner, commander, loader, loader
  • 155 mm L/52 gun-howitzer
    • Ammo:
      • 155 MM NABÓJ ODŁAMKOWO-BURZĄCY EOFDMK
      • 155 MM NABÓJ ODŁAMKOWO-BURZĄCY Z GAZOGENERATOREM EOFDMKM DV
    • Elevation: -3.5° to +70°
    • Fire rate:
      • burst: 3 rounds/10 s
      • intense: 6 rounds/min
      • sustained: 2 rounds/min.
      • “salvo” effect (MROT): ~3 rounds/min.
  • Gunner sight
    • COB-1 day-night, magnification x6
    • LWS Obra 3
  • Laser Rangefinder
  • 8x 81mm Smoke Grenade Launchers
  • Combat weight: 52 t
  • Engine: SS12-U (850 hp)
  • Max speed: 60 km/h

Armament

Details
  • 1 x 155 mm L/52 gun-howitzer

  • Elevation: -3.5° to +70°
  • Fire rate:
    • burst: 3 rounds/10 s
    • intense: 6 rounds/min
    • sustained: 2 rounds/min.
    • “salvo” effect (MROT): ~3 rounds/min.
  • Ammunition capacity: 40 rounds in turret (shells + containers for charges) 29+28
  • Additional ammunition capacity:in chassis (shells + containers for charges) 11+20


Footage of the reloading system in the Krab taken from wikepidia

  • Anti-aircraft machine gun: 12.7 mm WKM-B machine gun

Ammunition

The Krab utilises the 155 mm L/52 gun-howitzer, which can be found in-game, where it used by vehicles such as the German PzH 2000 and the Norwegian VIDAR meaning that it can easily gain access to the same rounds used by these vehicles, but these are also domestic Polish rounds which these vehicle can choose from.

155 MM NABÓJ ODŁAMKOWO-BURZĄCY EOFDMKM

  • Type: high-explosive long-range
  • Projectile weight with fuse [kg]: 40.30
  • Projectile length with fuse [mm]: 904.70
  • Explosive charge: TNT (trinitrotoluene)
  • Explosive mass [kg]: 10.00
  • Igniter: KZ984 mechanical shock
  • Lower fuse arming limit [m]: min 80
  • Minimum/maximum speed [m/s]: 337 for 1 x BC-E / 968 for 6 x TC-F, 337 for 1 x BCME100 / 949 for 6 x TCME10.
  • Propelling charges: BMCS EXPLOSIA (BC-E and TC-F modules),BMCS EURENCO (BCME100 and TCME101 module
  • Maximum range [m]:30,000 (6xTC-F), 28,000 (6xTCME101)
  • Igniter type: M 82 G

155 MM NABÓJ ODŁAMKOWO-BURZĄCY Z GAZOGENERATOREM EOFDMKM DV

  • Type: high-explosive long-range with gas generator
  • Projectile weight with fuse [kg]: 43.55
  • Projectile length with fuse [mm]: 914.00
  • Explosive charge: TNT (trinitrotoluene)
  • Explosive mass [kg]: 10.00
  • Igniter: KZ984
  • Lower fuse arming limit [m]: min 80
  • Minimum/maximum speed [m/s]: 569 for 3xTC-F/956 for 6xTC-F, 523 for 3xTCME101/940 for 6xTCME101
  • Propelling charges: BMCS EXPLOSIA Bi-Modular Propellant Charge System (TC-F modules), BMCS EURENCO Bi-Modular Propellant Charge System (TCME101 modules)
  • Maximum range [m]: 40,000 (6xTC-F), 38,000 (6xTCME101)
  • Igniter type: M 82 G

image

Ammo stowage of the Krab


Mobility

Details
  • Engine: MTU MT 881 Ka 500 (1000Hp)
  • Transmission: ALLISON X1100 - 5A3,
    • Gears: 8 Forward, 4 reverse
    • Top Speed: 60Km/h
  • Weight: 48 000kg
  • Supension: Hydropneumatic

Armour

Details

image

  • The turret is welded from 17 mm thick steel plates.
  • The hull of the tank is 40mm thick, 35mm thick one the sides and rear.

Optics, Electronics, Other

Details


Interior of the AHS Krab

  • Day & night vision device for driver

  • Day & night vision device for commander

  • Direct fire sight - COB-1 day-night, magnification x6, vision field 1-17 (6,5°)

  • Laser range finder

  • Laser warning system: OBRA-3

    • Detection angular range in vertical plane: -6°/+30°
    • Detection angular range in horizontal plane: 360°
    • Dange of detected radiation: 0.6 μm – 11 μm.
  • (2x4) 81mm Dezamet Smoke Grenade Launchers

  • Crew: 5

  • Weibel MVRS-700 SCD Doppler ballistic radar

  • Length (with gun forward): 12.1 Metres

  • Width: 3.64 Metres

  • Height: 3 Metres


Pictures/Videos

Newer batch of Krabs are equipped with a extra APU and 6 extra smoke grenades

https://www.youtube.com/watch?v=wtcsWTHiTJ8

https://www.youtube.com/watch?v=rzSAXlHLsL8

https://www.youtube.com/watch?v=IorQrcgH49Y

https://www.youtube.com/watch?v=MacyeS4uPFc

https://www.youtube.com/watch?v=dTV3P0UE23c

https://www.youtube.com/watch?v=MDfc8Zu6ddM

https://www.youtube.com/shorts/7ldtUOWhVyM


Sources

https://opisybroni.pl/ahs-krab/

Polska armatohaubica samobieżna AHS Krab | SmartAge.pl

AHS Krab – Wikipedia, wolna encyklopedia

Nowe Kraby dla wojska. MON podał szczegóły

Nowe Kraby w Sulechowie

Third Delivery of AHS Krab to Poland This Year – MILMAG

AHS Krab Brochure : Free Download, Borrow, and Streaming : Internet Archive

AMUNICJA ARTYLERYJSKA – Produkty - Dezamet.pl

SSP-1 OBRA-3 - Polish manufacturer of optoelectronic products PCO S.A.

155-mm samobieżna armatohaubica Krab, cz. II - Opis techniczny elementów modułu artyleryjskiego Regina - DziennikZbrojny.pl

Nowa Technika Wojskowa 2018 05 : Free Download, Borrow, and Streaming : Internet Archive Pages 34-39


If you spot any mistakes/find new information, please let me know and provide valid sources, thank you for reading!

5 Likes

you should probably change suggestion to ahs krab (pk9) or just ahs krab

it seemed like ahs krab and k9pl were the same vehicle from the name lol

Multiple sources refer to it as either K9PL or PK9, I will

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I will think about it though

+1 for future poland tree!

Poland also operates actual K9s with the original turret, correct?

Yes

yeah and they are called k9pl lol

No they are not, the K9’s that we operate right now are the K9A1 (sometimes referred to as K9GF).

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The K9PL is the up coming variant to be delivered soon, these vehicles will be bought up to the standard of the Krab. Both vehicles should share the same chassis as well.

1 Like

Nailed it indeed