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
