Test 5 Flashcards
What is the definition of a fuse
A device designed to initiate an explosive at the required time or place
What are the 3 categories of fuzes
Filling, position, function
What are the general requirements for fuzes
Safety and reliability
What are the other requirements for a fuze
- Optional delay setting
- Easy time adjustment/setting
- Minimum preparation for use
- Multi role to minimise refusing
- Standard weight
What are influence fuzew
Mag
Acoustic
Seismic
Hydrostatic
What are the categories of shutters, masks etc
Delay
Non delay
What are the advantages of elec fuzes and disadvantages
Adv - lower cost due to multi option function
versatile in arming
Mechanical preparation or intiation
What is a bore riding pin
A pin held under spring tension which is released upon exit of the barrel arming projo
What is inertia pallet
A heavy weight incaptulating the detonator. Carries dry forward onto firing pin.
What are the forces acting on a fuse
Set back - acceleration forces
Centrifugal - outwards spin forces
Creep forward - when projectile slows after acceleration
Set forward - repaid declaration associated with impact
Spin decay - centrifugal forces decelrate (can be used as self distruct)
Air and gas pressure - sometimes used to drive a turbine or arming
Stored energy - chemical or mechanical stored energy
Name the types of impact fuzes action
Sq
Delay
Graze
Non delay
Name the impact fuze caragories
PD
PIBD
BD
What are the safety arrangements?
Safety arrangements can be checked before and after assembly. Can not be assembled in an unsafe condition.
What is the role of a booster
To maintain or enhance the disruptive chain. Made of a c.e pallet
What are time fuzes
Time fuzes are designed to function after a predetermined time whilst in flight
