What are the three ways a fuze is classified?
- By Position (nose/tail)
- Action (impact/delay/airburst)
- Method of Arming (mechanical/electrical)
These classifications help in identifying the type and function of the fuze.
What is the first safety step before working with any fuze?
Review the pertinent Technical Orders (T.O.s)
Following T.O.s ensures compliance with safety protocols.
What should you do if a fuze appears to be armed or partially armed?
Do not handle it
Handling an armed fuze can lead to accidental detonation.
When can safety devices be removed from a fuze?
Only in accordance with the T.O.
This ensures that safety protocols are maintained.
What is the position and arming method of the M904 fuze?
Nose position, Mechanical arming
The M904 fuze is specifically designed for certain types of bombs.
What type of bombs is the M904 used with?
General Purpose (GP) bombs
GP bombs are versatile and widely used in various operations.
What component arms the M904 fuze?
The rotation of the arming vane
This mechanism is crucial for the fuze’s functionality.
What are two safety features of the M904?
- A seal wire with a warning tag
- An empty M9 delay cavity
These features enhance the safety of the fuze during handling.
What accessory adapts the M904 to the nose fuze well?
The T45 Adapter Booster
This accessory is essential for proper installation.
What accessory provides time delay options for the fuze?
The M9 Delay Element (has one non-delay and five time delays)
This allows for flexibility in bomb deployment.
What is the position and arming method of the M905 fuze?
Tail position, Mechanical arming
The M905 fuze is designed for specific bomb types.
What component arms the M905 fuze?
The rotation of the input drive shaft
This mechanism is vital for the fuze’s operation.
What safety feature prevents the input shaft from rotating on the ground?
A key spring on the base of the shaft
This feature is critical for ground safety.
What two-piece accessory adapts the M905 to the tail fuze well?
The T46 Adapter Booster
This accessory is necessary for proper installation.
What provides the rotational force to arm the M905 on the aircraft?
The ATU-35 Drive Assembly
This assembly is essential for the fuze’s functionality.
What component connects the drive assembly to the fuze and reduces the rotation speed?
The MAU-87 Governor Coupler
This component is crucial for controlling the arming process.
What connects the ATU-35 to the MAU-87?
The MAU-86 Flexible Drive Shaft (a steel cable)
This connection is vital for the operation of the fuze.
What is the purpose of an Arming Wire?
To prevent the rotation of the fuze’s arming vane or input shaft until bomb release
This ensures safety until the appropriate moment.
What is a Swivel and Link?
A double-loop assembly that connects the arming wire to the aircraft bomb rack
This component is essential for the safe operation of the fuze.
What is a Ferrule?
A short tube of twisted metal used to secure the arming wire to the bomb’s suspension lug
This ensures that the arming wire remains properly connected.
What is the purpose of Safety Clips (FZU-17 & FZU-18)?
To prevent the arming wire from pulling out of the fuze prematurely
This feature enhances safety during handling.
What is the main difference between the FZU-17 (Brass) and FZU-18 (Beryllium) clips?
Their stripping force. FZU-17 requires 2-8 lbs, FZU-18 requires at least 15 lbs
This difference affects how the clips function under various conditions.
