Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AT 0013 > Fuzes > Flashcards

Fuzes Flashcards

1
Q

What is the definition of a fuze?

A

A fuze is a device designed to function an item of ammunition under pre determined circumstances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What do the abbreviation by position of fuze PD, BD and PIBD mean?

A

PD - Point Detonating
BD - Base Detonating
PIBD - Point Initiating Base Detonating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What do the abbreviation by function T, CT, MT, VT, CVT, SQ, DEL, MTSQ, TSQ, PDSQ, MO, ET mean?

A

T - Time
CT - Combustion Time (May also be PTTF)
MT - Mechanical Time
VT - Variable Time
CVT - Controlled Variable Time
SQ - Super Quick
DEL - Delay
MTSQ - Mechanical Time Super Quick
TSQ - Time Super Quick
PDSQ - Point Detonating Super Quick
MO - Multi Option
ET - Electronic Time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the 3 general and 6 other requirements for fuzes?

A

General
-Safety for storage and transport
-Safety against premature firing
-Reliability to high order when required
Other
-option for delay setting
-easy time adjustment/setting
-minimum prep time
-multi role to minimise fuzing
-standard weight
-must fit standard cavity size
(SSR MEMOMS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What 7 forces act on the fuze that can be used for arming and functioning?

A

Set Back
Set Forward
Creep Forward
Spin Decay
Centrifugal Force
Air or Gas Pressure
Stored Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the required amount of independent forces that must act on the fuze during the arming sequence?

A

Two

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the principle requirements of mechanical devices and fuze components?

A

-Functions at the desired moment
-Remains safe in handling
-Bore and muzzle safety immediately after firing
- Arms after leaving the muzzle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the 3 safety and arming mechanisms?

A

Holding device
Locking device
Safety device

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are 6 other fuze components?

A

Protective Cap
Pellets
Delay Systems
Detonators
Magazine or booster
Channel
(PPDDMC)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the 3 advantages to using electronic fuzes?

A

Lowers costs due to multi role function
Versatility in arming
Mechanical preparation or initiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the three categories of time fuze ?

A

Mechanical
Combustion
Electronic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the definition of a prox fuze?

A

Proximity fuzes are automatic time fuzes that are designed to function a projectile at the optimum lethal distance from the target.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Proximity fuzes can be divided into what two groups?

A

Variable time (VT)
Controlled variable time (CVT)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the 4 impact fuze actions?

A

Super quick
Graze
Non delay
Delay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Fuzes classified by function have what three types?

A

Time
Impact
Proximity

17
Q

Fuzes are classified according to what three categories?

A

Filling
Position
Function

18
Q

Describe the doppler effect -

A

Radio waves are emitted by the fuze, the waves reflected are picked up by the reciever. As the fuze gets closer to the set target distance the impulses increase to a defined peak value and the fuze functions.

19
Q

What is stored energy?

A

(Mechanical) usually a spring used to operate clockwork devices or shutters.

20
Q

What is air or gas pressure?

A

Pressure is sometimes used to drive a turbine to generate power for electrically operated fuzes

21
Q

What are the 4 options on a multi option fuze?

A

Proximity
Super quick
Delay
Near surface burst

22
Q

What are the three distinct types of MT fuze mechanisms

A

THIEL - British MT Fuzes
- A series of wheels and pinions controls the escape of from a main spring which is wound up during manufacture

JUNGHANS - American MT Fuzes
- This mechanism is actuated by spring assisted by centrifugal weights

DIXI - Swiss Fuze
- This mechanism is driven by centrifugal force acting on driving balls

23
Q

What are the 4 power sources for proximity fuzes?

A

Battery
Turbine generated
Precharged
Electrostatic

24
Q

What are the 10 design considerations for prox fuzes?

A

Have good storage characteristics.
Not easily jammed.
Able to function in all conditions.
Rugged.
Safe to handle.
Economical.
Not subject to false operation.
Able to fit existing projectiles.
Light weight.
Sensitive and rapid in operation.
(HN ARSENALS)

25
Q

How does graze fuzing work?

A

A movable part (graze inertia pellet or plunger) carries the detonator onto the needle once the projectile is checked in flight or decelerates.

26
Q

What are the 3 basic sections of a prox fuze

A

Nose
Steel Base
Sleeve

27
Q

What is a holding device?

A

Locks other components in a safe position until arming is required, unlock them and can possibly re-lock.

28
Q

What are the 3 safety devices used in unspun ordnance (mortars/rockets) when centrifugal force cannot be used?

A

Safety Pins
Cotter Pins
Pull Pins

29
Q

What is the common method of operation for fuzes?

A

Unlocking a component by set back, easing it on its seating during creep forward, Swinging it to an armed position by centrifugal force.
Initiation of the explosive train by set forward on impact.

30
Q

Definition of a Time Fuze

A

A fuze designed to function after a predetermined time whilst in flight.

31
Q

How are time fuzes set before loading? 4 ways

A

Rotation
Moving a portion of fuze with fuze key
Fuze setter
Fuze setting machine

32
Q

What are the standard cavity types for fuzes?

A

Mortar - 1.5 inch
Artillery - 2 inch

33
Q

2 types of masking devices

A

Delay or non delay masking Shutter and sliders
Delay Arming Shutter

34
Q

What is an inertia pellet?

A

A heavy weight that carries the detonator on rapid deceleration into the firing pin.

35
Q

Explain when a fuze is armed.

A

A fuze is armed when it has gone through all of its firing forces and the explosive train is in line.

36
Q

In design safety, the system shall be designed so that what?

A

Cannot be assembled in an unsafe condition
Safety arrangements can be checked during and after assembly

37
Q

In storage what 4 things should Prox fuses be protected from and in what orientation should they be stored?

A

Dampness
Sunlight
Heat
Drop / Strike
commonly stored nose down IOT protect the battery ampoule.

AT 0013 (21 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions