Safety, Reliability

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Safety, Reliability Performance of the Ahead
(ABM) Programmable Fuze SystemNDIA 39th Annual
Gun AmmunitionBaltimore, MD Apr. 13-16, 2004
Presented by Allan Buckley Director Product
Management Oerlikon Contraves Pyrotec AG CH-8050
Zurich / Switzerland www.mauseroerlikon.com allan.
buckley_at_ocag.ch
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AheadThe AIR BURST TechnologyforMedium
Calibre Ammunition
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Ahead (ABM) for Air Defense and Vehicle Armament
Application IFV
Programmer
Target
Payload Ejection
Vo Measurement
Fuze Programming
Fire Control Unit
ABM Electronics
F2 15087 DE
4
Ahead (ABM) KETFProjectile Concept Outline

• Time
• Programmable Payload
• Electronic Fuze
• Power Ejection
• Supply Charge Subprojectiles
• Explosive Train (W-Alloy)
• (Squib, SA, Deto)
• Data Electronic
• Receiver Timer Module
• Coil (ETM)

(Setback Generator)
F2 15024 BB
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Ahead (ABM) Fuze Module

• Ignition System / Squib
• Electronic Timer Module / ETM 40F9211-11
• Set-Back Generator

F2 15086 CE
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Safety Criteria for Ahead (ABM) KETF Fuze
ABM AHEAD KETF FUZE
MECHANICAL FUZES
Storage
Ignition Energy Chemically Stored
Ignition Energy Mechanically Stored
Ignition Energy Chemically Stored
Ignition Energy Completely Inert
Axial Acceleration
Safe Lock 1 Axial Acceleration
Safe Lock 1 AxialAcceleration
Rotation
Ignition Energy Electrically Stored
Safe Lock 2Rotation
Electr. Muzzle Safety (embedded)
Safe Lock 2Rotation
Exterior Shock
DETONATION
DUD
No Impact Sensor
Interior Ignition Trigger
DUD
SELF-DESTRUCT
PROGR. DETONATION / SD
DUD
F2 16516 A1
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Ahead (ABM) KETF FuzeLife Cycle Events - Summary
Muzzle Area
Operational Range
Phases
Post Range
Barrel
Storage
0 ms
64 ms
Muzzle
8192 ms
gt10000 ms
Propellant
Cartridge Percussion
Rupture Disc Punched (Set-Back Generator)
Axial Lock
SAFE
Capacitors Loaded
Electrical Energy
Capacitors Totally Discharged
Rotation Lock
Detonator In Armed Position
SAFE
No Ignition Energy
No Ignition Energy
Electronic Muzzle Safety
Programming Window
No Time Programming Possible (ECM Proof)
Electronics
Time Programming
Programmed Payload Ejection
Self-Destruct
1000
10000 ms
0lt
5
10
50
100
F2 16516 A5
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Ahead (ABM) System Function Reliability
Theoretical Reliability Prediction according
MIL Handbooks 217F2 338
Results of ABM System Ahead Reliability In
Theory gt 97 In Practice gt 97
F2 16260 AA
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35 mm Ahead (ABM) HETFProgrammable Payload
Delivery
Precise Time Space Payload Delivery up to 5000
rd/min!
10 Rds between 1200 m 300 m
every 100 m!
1st Rd 1200 m
10th Rd 300 m
M1 15555
String of Pearls at 550 rd/min of 35mm
Ahead-HETF Ammo
F2 15559 CC
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Compensation of theMuzzle Velocity Variation
Without Compensation
With Compensation
M1 15557
M1 15556
Burst of 7 Rounds 35mm Ahead-HETF Ammo at 1.6 km
Range
F2 15561 CD
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30mm x 173 Ahead (ABM) KETF Subprojectile
Payload Layout Footprint
TM P-T03.02.07-189-B10_MVC-577F
F1 16358 AB
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30mm x 173 Ahead (ABM) KETF Subprojectile
Dynamic Parameter
Payload Ejection at 500 m Range (Cone of 12
Opening Angle)
80
Subprojectile-Density (/m2)
Velocity Perforation ()
85
3
90
5
12
55.4 m2 (8.4 m)
Striking Area (Diameter)
94
Projectile (162 SP)
31.3 m2 (6.3 m)
46
12
13.9 m2 (4.2 m)
100
3.5 m2 (2.1 m)
Distance (m)
F2 10138 CD
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30mm x 173 Ahead (ABM) KETF Subprojectile
Penetration Capability
Mild Steel Plate Thickness Penetrated mm
Subprojectile (SP) 1.24 g
SP per Round 162 Target
Plate Mild Steel
Range of Subprojectiles m
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30mm x 173 Ahead (ABM) KETF 3 Rd
BurstEffectiveness against ATGW-Bunker at 1 km


Notice ATGW Anti-Tank Guided Weapon

Results Numerous Full Perforations / 100 Damage
(Demo Dec.1999)
F2 16156 BB
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30mm x 173 Ahead (ABM) KETF 5 Round Burst
against Squad of 7 - Target
Target Squad of 7 (Field 2 x 38m)
Target Field
The video shows a 5 round burst fired to the
target field (firing rate 200
rd/min). Distance between rounds 9 m Multiple
perforations in each of the 7 target plates (2mm
Fe) 13
Perforations/m2 on Average.
M1 16501A8
F1 16501 A84
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30mm x 173 Ahead (ABM) KETF againstUrban Target
(Unprogrammed Fuze)

Target 20 cm Concrete Wall with
double Steel-Structure Reinforced Range 500
m Results Target
Fully Penetrated
M1 15962BA
F2 15562 BB
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35mm x 228 Ahead (ABM) KETF HETFagainst
ATGW-Bunker
Lethality of a 3 Rd Burst against an ATGW Bunker
at 1500 m
F2 15256 BA
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Ahead (ABM) KETF Ahead Technology Main Safety
Features

• Power Supply Set Back Generator (Activation
  over 28000 g) i.e no Battery
• Full Gun Unload Safety
• Safe Arm Mechanical Electronic
• Time Programming of less than 64 ms not accepted
  (Default Self Destruct )
• Each Bit programmed with Double Pulse
• Completeness Check on 12 Bit Message (if
  negative Self Destruct On!)
• If no fuze programming required or possible
  automatically Self Destruct On
• No Impact Sensor in Fuze firing through bushes
  tree branches w/o burst
• Total HE content less than 0.6 g for 30mm

F2 15037 CE
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One Ahead (ABM) Fuze System - Two Different
Warhead Configurations
30mm x 173 35mm x 228
Subprojectile Warhead KETF
(Kinetic Energy Time Fuze)
Fuze
Blast Fragmentation Warhead HETF (High
Explosive Time Fuze)
40mm x 53
Scale
F2 16124 BC
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Ahead (ABM) HETF Basic Concept for 40mm x 53
Automatic Grenade Launcher AGL
T A R G E T
Conventional HE Round (PD-Fuze)
Optimum for Air Burst Munition
F2 15015 BA
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40 mm x 53 Ahead (ABM) HETF Firing Trials at 200
m 1000 m Range




Remarks No fragments are flying
backwards! Firing Rate up to 570 rd/min
(AGL-ST-Kinetics)
6008
6008
M1 16117BA
F2 15254 BB
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Ahead (ABM) System Milestones

• 1973 8 bit - transmission demonstrated on a 20
  mm shell at muzzle exit (1st Ahead-like
  programming)
• 1992 35 mm Ahead - Ammunition technical
  presentation to international ammo experts
  /OCP- Test Center
• 1996 NATO qualification of the Ahead system
  (Canada)
• 1999 Demonstration of ABM 30 mm x 173
  prototype
• 2000 Demonstration of ABM 40 mm x 53 prototype
  for AGL
• End 2003 - 35 mm Ahead ABM Systems fielded in
  8 countries.
• In evaluation / procurement in several
  others.
• - 30 mm x 173/170 40 mm x 53 ABM in
  evaluation in several countries.

F2 16310 BC
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35mm Ahead (ABM) KETFDetonation in Ammo Box
Ejection Charge (0.9 g HE)
of One Round Detonated
Result no damage occurs
to the other packed rounds and therefore no
sympathetic detonation possible
F2 16516 A6