AS-90
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| AS-90 | |
|---|---|
| Specifications | |
| Weight | 45 tons |
| Length | 9.7 m |
| Width | 3.3 m |
| Height | 3.0 m |
| Crew | 5 (Commander, Driver, 3 Gun crew) |
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|
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| Armour | max. 17 mm steel |
| Primary armament |
155 mm 39 calibre gun |
| Secondary armament |
7.62 mm L7 GPMG |
| Engine | 660 hp |
| Power/weight | hp/tonne |
| Suspension | hydropneumatic (Hydrogas) |
| Operational range |
420km (on road) |
| Speed | 53 km/h |
The AS-90 (Artillery System for the 1990s) is a lightly-armoured self-propelled artillery piece used by the British Army. It was first delivered in 1993.
The AS90 is used by five field regiments of the Royal Regiment of Artillery and Royal Horse Artillery: 1st RHA, 3rd RHA, 4 Regt RA, 19 Regt RA and 26 Regt RA, replacing the 105 mm FV433 Abbot SPG, the M109 155 mm SPG or the FH-70 155 mm towed gun.
AS 90 was designed and built by the Armaments division of Vickers Shipbuilding and Engineering (VSEL, owned by BAE Systems since 1999), who provided 179 vehicles from 1992-95 at a cost of £300 million.
In 2002 BAE systems were contracted to upgrade 96 British Army AS90s to a 52 calibre gun to push the unassisted range to 30 km and with long-range ERA ammunition to 60 to 80km.[1] However, due to the inability of the selected bi-modular charge system from Somchem of South Africa to meet the requirement for insensitive munitions this program is in abeyance.[2]
Contents |
[edit] Development
AS90 started in the mid 1980s as a private venture on the 'gamble' that the tri-national SP70 would fail. When this duly occurred, the Ministry of Defence (MoD) issued a cardinal point specification on one page for a new 155 mm SPG. Four tenders were submitted, and AS90 was the only offer that was not 'brochureware'. The MoD was also required to consider the US "Paladin" an upgraded M109 howitzer.
[edit] Design
The AS90 is fitted with a 155 mm gun (39 calibre) which fires the NATO L15 projectile out to a range of 24.7 km (30 km with Extended Range Ammunition). This was a new design of ordnance and uses a sliding block breach with integral obturation to permit bagged charges (ie no metal cartridge cases). The breach mechanism has a primer magazine holding 18 primers.
The vehicle is fitted with an autonomous navigation and gun laying system (AGLS) and all main turret functions are controlled by a Turret Control Computer (TCC). Every gun is fitted with a radar Muzzle Velocity Measuring Device.
It also has an auxiliary engine to eliminate the need to run the main engine to keep the batteries charged while static; electrical servos drive the automated elevation, traverse, magazine and loader as well as load for electronics and communications.
[edit] Characteristics
- Crew: 5, driver plus 4 gun crew
- Length: 9.07 m
- Width: 3.3 m
- Height: 3.0 m
- Armour: 17 mm (maximum, steel)
- Weight: 45 tons
- Calibre: 155 mm
- Range: 24.7 km (39 cal), 30 km (52 cal) standard charges
- Rate of fire: 3 rounds in 10 seconds (burst), 6 rounds per minute for 3 minutes (intense), 2 rounds per minute for 60 minutes (sustained)
- Secondary armament: 7.62 mm L7 GPMG
- Ammunition carried: 48 projectiles and charges (31 turret and 17 hull), 1000 MG rounds
- Main Engine: Cummins VTA903T 660bhp 90 degree, v8, 4 stroke, liquid cooled, turbo diesel,
- Max Speed: 55 km/h (Road)
- Range: 370 km or 231 miles (Road)
- Ground clearance: 0.41 m; Gradient: 60°; Vertical obstacle: 0.75 m; Trench crossing: 110 inches; Fording depth: 1.5 m
[edit] Variants
AS-90D - Modified for desert use. Thermal protection for crew and extra cooling for engine and machinery. Tracks adapted for reduced wear in sandy conditions
AS-90 "Braveheart" - Basically the AS-90D, but fitted with the 52 calibre length gun. This modification is in abeyance due to non-compliant propelling charges.
Chrobry/"Krab" - Licensed "Braveheart" ("Chrobry") turret on a Polish chassis, with modern "Azalia" BMS. Designed and integrated in Poland, by Huta Stalowa Wola and WB Electronics. As of early 2007, two Krab ("Crab") prototypes are built, and successfully completed all required evaluations and state acceptance trials. Order for 48 of 80 projected units is expected in 2008.
[edit] References
[edit] See also
| Modern (post WW2) UK armoured fighting vehicles |
|---|
| Wheeled vehicles |
| Ferret Scout Car | Fox Reconnaissance Vehicle | Saladin Armoured Car | Saracen APC |
| FV1611 "Pig" | Saxon | Mastiff PPV |
| Armoured personnel carriers and infantry fighting vehicles |
| FV432 | Warrior | FV103 Spartan | Stormer | FV104 Samaritan | FV105 Sultan |
| Light tanks and anti-tank vehicles |
| FV101 Scorpion | FV107 Scimitar | Sabre | FV102 Striker | FV438 Swingfire |
| Self-propelled artillery |
| FV433 Abbot | AS-90 |
| Main battle tanks |
| Centurion | Conqueror | Chieftain | Challenger 1 | Challenger 2 |
| UK unarmoured or non-fighting vehicles |
