The 105 mm(LEO) light weight Light Experimental Ordnance
(LEO) is the latest Gun - Howitzer developed by
Denel. The gun system is accurate, transportable by helicopter
and can be towed by a 4X4 type of vehicle.
The 105mm is being developed to satisfy the users requirement
for modern day warfare, that is:
The need for fewer but more mobile forces to cover the
same operational area;
To ease the logistic burden placed on the system, hence
ease of deployment;
To reduce the gun and logistic weight and make it more
(transportable) tactically mobily;
To improve the fire precision, requiring less ammunition
to achieve the same end result;
To make provision for the demography of the world population,
human machine interface;
To be deployed under all possible conditions;
To be very reliable.
Deployment
Manual
Crew
Time to deploy
Time, out of action
Trails
(spread/close)
Firing platform (raise/lower)
Main wheels (raise/lower)
5 men
2 minutes (5 men)
3 minutes (5men)
Sighting and laying system
TYPE
Simple telescopic sight for direct firing
Optical indirect sight with compensation mechanism
for trunnion cant
Ammunition handling
TYPE
Manual ramming
Further improvements in process
Ring laser gyro with gun display unit
Automatic laying system
Positive chain rammer, hydraulically operated and controlled
for ramming both projectile and charge
105 mm
58 calibre effective, autofretagged
1:22
Dual semi-automatic swing and slide type
Pepperpot multi-stage internally rifled
Hydraulic type, <1 meter recoil
Gas type
(maximum) 6 rounds/minute
(sea level)
23 km plus
28 km plus
500 m - 3 km
Traverse
and elevation Control Equipment
Type
Elevation range
Firing arc
• at all elevations
Traverse speed
Elevation speed
Electro-hydraulic
with joy stick control.
Hydraulically driven mechanical gearbox
Elevation cylinder combined with pneumatic equilibrator
3 800 kg (target
2 700kg)
6,9 m
2,02 m
< 2,1 m
0,3 m adjustable
1,82 m
Wheels and Brakes
Main
wheels
Brakes
Inertia brake activated by the tow hook (coupled to gun
tractor) with drums on main wheels. Parking brake forms
part of brake system.
LEO AMMINITION DESIGN PROJECTILES
Projectiles
designed for the LEO consist of:
HE with TNH filling
HE-PFF, Pre-fragmented with TNH filling. Tungsten
balls assembled inside shell.
Standard Boat Tail
Base bleed (field interchangeable)
Projectile
Characteristics
Length
Mass
Flight mass
Filling type
Filling mass
Static lethal area
Dispersion @ 21 000 m
Ballistics
477
mm (unfused)
15,08 kg
15,8 kg
TNH
2,3 kg
STD - 500 m2
PFF - 1900 m2
PE < 0,3 % of range
PE < 0,5 mils in deflection
max range 24 000 m plus @
950 m/sec
Lethality of HE-PFF compares
favourably with most 155mm HE ammunition
Incidence angle of 65 degrees and burst
height of 4 meter
FUSES
Multi-option
with
Time option
Proximity option
Dead time
Point detonation
Delayed point detonation
3.0 to 199,9 seconds
Optimised burst height - Low, Medium, High - 3 to 15
Meters
Programmable to - 3,0 to 199,9 seconds
Super quick surface action
Programmable delay - up to 15 milli-seconds
Compatible fuses
on direct action, electronic time or proximity types,
all suitable for full charge and maximum range application.
MODULAR CHARGE SYSTEM
Optimised to reduce barrel wear
Reduced Muzzle flash
Ergonomically optimised with respect to ease of handling
Reliable and repeatable ballistic performance under specified
environmental conditions
Insensitive munitions characteristics
Ease breaking down and building up required number of
charges by means of clip on
