Some of You wont believe this is Made In Sg,even after reading this.
TOWED ANTI-AIRCRAFT GUNS, Singapore
Date Posted: 15-Mar-2005 by Jane's
Jane's Land-Based Air Defence
Allied Ordnance of Singapore 40 mm L70 Field Air Defence Mount (FADM)Development
Allied Ordnance of Singapore (AOS), a subsidiary of the now Singapore Technologies Kinetics (ST Kinetics), has extensive experience in 40 mm air defence systems for both land and sea applications. Singapore Technologies Kinetics is itself the land systems arm of Singapore Technologies Engineering (ST Engineering). A further subsidiary company of ST Kinetics - Advanced Material Engineering Pte. Ltd. (AME) - designs and manufactures conventional and smart munitions advanced protective materials as well as guided system components.
In 1994, the company disclosed that it was developing, as a private venture, the 40 mm L70 Field Air Defence Mount (FADM). This is an improved version of the standard combat-proven Saab Bofors Dynamics 40 mm L70 towed anti-aircraft gun covered later in this section.
The 40 mm Field Air Defence Mount (FADM) was successfully tested and proof fired in 1996 and initial production has now commenced.
Description
Today's air defence threats, with their higher speeds and greater manoeuvrability, make more demands on the air defence weapon. Modern air defence weapon systems must offer high-hit probabilities, fast response times, autonomy and round-the-clock operation.
FADM has been designed to meet these requirements and is said to be capable of
intercepting all kinds of high-speed aerial and surface targets. To carry out this mission it has the following advanced features:
1. Electric drive aiming system using brushless motors to attain high tracking and aiming accuracy in very quick time.
2. Battery powered, providing immediate and non-interruptible source of power supply on demand.
3.
101-round dual-compartment 40 mm magazine to allow for ample engagements without reloading and immediate selection of two types of ammunition providing the unique capability of defending against aerial and surface targets simultaneously and instantly.
4. Fires the highly destructive 40 mm L70 PFHE at a cyclic rate-of-fire of 330 rds/min to provide an effective and sustained defence against modern air targets.
5. On-mount Optronic Fire-Control System (OFCS) with FLIR for autonomous, round-the-clock operations and ECM immunity.
6. New rigid one-piece carriage providing a stable firing platform on land.
7. An automatic levelling device to allow for very quick deployment in less than three minutes with an accuracy of ±1 mrad. Immediate deployment is also possible under emergency situations, for example, the gun can be lowered to the ground with its outriggers spread for stability and firing can commence almost immediately.
Although the AOS 40 mm L70 FADM is fully autonomous, it can be interfaced easily with any remote fire-control system. The weapon system is complemented by a full range of 40 mm L70 ammunition including PFHE, HE-T and PT. Production of this ammunition is undertaken in Singapore.
Specifications
Weapon
Calibre: 40 mm
Number of barrels: 1
Barrel length: 2.8 m
Recoil mechanism: hydro-spring
Breech mechanism: vertical sliding
Weight: (excluding ammunition) 6,000 kg
Max length: (tow bar extended) 6.60 m
Max width: 2.25 m
Max height:
(travelling) 2.5 m (includes the installation of electro-assembly)
(trunnion above ground) 1.30-1.50 m (firing position)
Traversing radius: 3.26 m (firing position)
Ground clearance: (travelling) 0.39 m
Track: 2.00 m
Wheelbase: 4.05 m
Elevation/depression: +80º/-4º
Traverse: 360º
Power operation:
(max elevation speed) 60º/s
(max elevation acceleration) 152º/s2
(max traverse speed) 100º/s
(max traverse acceleration) 152º/s2
Synchro ratio (coarse): 1:1
Synchro ratio (fine): 16:1
FCS interface: RS422 or MIL-STD-1553B
Rate of fire: 330 rds/min
Numbers of rounds on gun: 101
Effective anti-aircraft range: 4,000 m
Main voltage: 3 × 415 V 60 Hz
Power consumption: 5 kVA max
Reference voltage: 115 V 400 Hz
Battery voltage: 48 V
Battery capacity: 100 Ah
Electro-optic fire-control system
Laser range-finder
Wavelength: 1.54 µm (eye safe)
Pulse repetition rate: continuous, 3 Hz
Accuracy: 7 m
Range: 6,000 m
Technology: Neodymium: YaG and Radan shift cell (standard atmosphere and NATO standard)
FLIR
Wavelength: 8-12 µm (TCM detectors) (options for 3-5 µm)
Cooler: integral stirling cycle
Cool-down time: 3 min
Narrow field of view: 2 × 3º
Wide field of view: 4 × 6º (pupil 76 mm)
Detection: 10 km on aircraft
Tracking: 7 km on aircraft
CCIR output: 25 images/s
Resolution: 0.21 mrad (narrow field of view)
Max resolution: 200 pts/line × 575 lines
Fire-control computer
Ballistic computation with 3 integrated ballistic switchable
Future target calculation
Firing sequence and auto tracking
Overall aiming accuracy of less than 2 mrad
Access for parameters such as wind, ammunition mean point of impact, muzzle velocity and air conditions
Reflex sight
Magnification: ×1
Field of view:
(horizontal) 20º min
(vertical) 16º min
Diameter of collimator: 78 mm
Status
In production.
Manufacturer
Allied Ordnance of Singapore (Pte) Ltd
