| Chapter 1 |
| INTRODUCTION |
| Purpose |
| Definition |
| Description |
| Operation |
| Safety |
| Remarks |
| Chapter 2 |
| DESCRIPTION |
| Introduction |
| Fuze Body |
| Transmitter-Receiver |
| Amplifier, Thyratron and Wave-Suppression Feature |
|
Amplifier |
|
Wave-Supression Feature |
|
Firing Condenser |
|
Thyratron 4 |
| Reserve Energizer |
|
Spin Breaker |
|
Dry Energizers |
| Rear Fitting |
|
Squib |
|
Reed Switch |
|
Mercury Switch |
|
Clock Works |
| Auxiliary Detonating Fuze |
| Assembly and Waterproofing |
| Chapter 3 |
|
OPERATION |
| Chapter 4 |
| VT FUZES FOR PROJECTILES |
| Mk 32 Mod 0-10, 14, 16-18, 20, 30, 40
(Obsolete) |
| Mk 40 Mod 0-5, 7 (Obsolete) |
| Mk 45 Mods 11 and 12 (Obsolete) |
| Mk 47 Mod 0 |
| Mk 53 Mods 0-2 (Obsolete) |
| Mk 53 Mods 3-6 (Mods 3 and 4
Obsolete) |
| Mk 58 Mods 0-4 (Mods 0, 1,
2-Obsolste) |
| Mk 59 Mod 0 |
| Chapter 5 |
| VT FUZES FOR SPIN-STABILIZED ROCKETS |
| Mk 173 Mods 0, 2, 4 |
| Chapter 6 |
| OPERATIONAL USE |
| Introduction |
| Antiaircraft |
|
Limitations |
|
Effectiveness |
| Shore Bombardment |
|
Limitations |
|
Effecitvness |
| Use Against Ships |
| Targets for Antiaircraft Gunnery Practice with VT Fuzes |
| Chapter 7 |
| CHARACTERISTICS |
| Operability |
|
Percent Operability |
|
Premature Bursts |
|
Duds |
|
Temperature |
|
Damage |
|
Serious Effects on Operability |
|
Tracers |
|
Coppering |
|
Hot Guns |
| Moderate Effects on Operability |
|
Atmospheric Effects |
|
Window |
|
Aerial Flares |
|
Salvo Fire |
|
Very New or Very Old Guns |
| No Effect on Operability |
|
Degaussing and Deperming |
|
Shipboard Radio and Radar |
|
Arming Range |
|
Internal Design Features |
|
Activating Time of Battery |
|
Condenser Charging Time |
|
Mercury Switch Unshorting Time |
|
Reed Switch Unshorting Time |
|
Auxiliary Detonating Fuze Arming Time |
|
Faulty Construction |
|
External Factors Affecting Arming Range |
|
Fuze Temperature |
|
Gun Effects |
|
Wave Effects on Arming Time |
|
Atmospheric Effects on Arming Time |
|
Sensitivity |
|
Life |
|
Refuzing |
|
Precautions |
|
Fuze-Cavity Liners |
|
Chapter 8 |
|
ROUTINE TEST FIRING |
|
Time of Test Firing |
|
Exchange of Ammunition |
|
Detailed Instructions |
|
General Information |
|
Detailed Test Results |
|
Type of Fuze Action |
|
No Observation |
|
Distinction Between Low Normals and Duds |
|
Use of Table to Determine Round at Which to Stop
Test |
|
Instructions in Mailing Report |
| Chapter 9 |
| THEORY |
| Introduction |
| Transmitter |
| Receiver |
| Amplifier |
| Wave-Supression-Feature Circuit |
| Firing Circuit |
| Appendix A |
| SAFETY FEATURES, HANDLING, AND PRECAUTIONS |
| Safety Features |
|
Energizers |
|
Charging Resistor |
|
Reed Switch |
|
Mercury Switch |
|
Auxiliary Detonating Fuze |
|
Arming Range |
| Handling Precautions |
| Stowage |
| Loading |
| Disposal of Damaged Fuzes |
| Disposal of Fired Duds |
| Degaussing and Deperming |
| Shipboard Radio and Radar |
| Firing Precautions |
| Appendix B |
| REFERENCE DATA |
| Table 1. Navy VT Fuzes for Projectiles and Spin-Stabilized Rockets |
| ILLUSTRATIONS |
| Figure |
| 1. Cutaway and exploded view of a typical VT fuze (VT Fuze Mk 53 Mod 5) |
| 2. Sectional views of reserve energizers |
| 3. Simplified drawing showing operation of Spin Breaker Mk 1 Mod 0 |
| 4. Sectional drawing of reed switch |
| 5. Sectional drawing of mercury switch |
| 6. VT Fuze Mk 32 |
| 7. VT Fuze Mk 40 |
| 8. VT Fuze Mk 45 |
| 9. VT Fuze Mk 47 Mod 0 |
| 10. VT Fuze Mk 53 Mods 0-4 |
| 11. VT Fuze Mk 53 Mods 5 and 6 |
| 12. VT Fuze Mk 58 |
| 13. VT Fuze Mk 59 Mod 0 |
| 14. VT Fuze Mk 173 |
| 15. Test Report Form-NAVROD FORM 1758 |
| 16. Schematic diagram of transmitter-receiver (T-R) circuit |
| 17. Standard dipole radiation pattern |
| 18. Effective sensitivity pattern of a VT fuze compared with the
fragmentation pattern of a 5-inch projectile |
| 19. Variation of transmitted wave amplitude with distance from
projectile |
| 20. Wave relationships between transmitted and reflected waves |
| 21. Relationships within transmitter-receiver of transmitted and
reflected waves |
| 22. Schematic diagram of amplifier |
| 23. Amplifier frequency-response characteristics |
| 24. Wave-suppression-feature sensitivity curve |
| 25. Schematic diagram of wave-suppression-feature (WSF) circuit |
| 26. Schematic diagram of firing ciruit, with safety switches |
|
27. Average arming characteristics of firing
condenser |
