Fuzing

1
Fuzing

• Naval Weapons Systems

2
Introduction

• Why do we have a fuze?
• Trigger explosive reaction
• Keep weapon safe when not needed
• Must be reliable and dependable
• Safing and Arming Mechanism

3
Functions of the Fuze

• Keep weapon safe
• Arm weapon
• Recognize or detect target
• Initiate detonation
• Determine direction of detonation
• Special Fuzes only

4
Basic Fuzing System
Warhead
Target Detecting Device TDD (sensor)
Safing And Arming Device
Warhead
Explosive Output Lead
Detonator
5
Target Detection Device
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Target Detection Device (Four Basic Categories)

• Impact or Contact
• Ambient - Environmental factor
• Timer
• Proximity

7
Fuze Classificationby weapon application

• Gun Projectile Fuzes
• Rotating Ammo
• Non Rotating Ammo
• Rocket Fuzes
• Bomb Fuzes
• Mine Fuzes (Exploders)

• Missile Fuzes
• Air-to-Air
• Air-to-Surface
• Surface-to-Air
• Surface-to-Surface
• Torpedo Fuzes (Exploders)

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Fuze Classificationby fuze operation

• Proximity Fuzes
• Active
• Semi-Active
• Passive
• Timed Fuzes
• Point Detonating Fuzes
• Delay Fuzes
• Command Detonated Fuzes

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Proximity Fuzes
Active
Semi-Active
Passive
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Safing Arming Mechanism

• Safety Arming Sensor
• Barrier between the TDD and the warhead
• Can be physical or mechanical

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Activation Forces

• Used to arm the warhead
• Time
• Acceleration (Setback)
• Deceleration (Creep)
• Centrifugal
• Impact

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Redundancy in Fuze System

• Safety - Devices placed in series in firing path
  for safety.
• Arming - Components placed in parallel in firing
  path for arming firing reliability.

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Redundancy in Fuze System
14
Questions?
15
Presentations Grading

• Subject Knowledge
• Content of Presentation
• Eye Contact
• Body Language
• Is it 15 minutes long?
• Are there any, uh, um, pause words?