Gun System Components

Question 1

Answer 1

Question 2

Barrel, breech, feed system, cooling system are part of what part of the gun?

Answer 2

Gun Structure

Question 3

Recoil and laying systems are part of what part of the gun?

Answer 3

Mounting arrangement

Question 4

“A tube capable of containing and controlling the explosion of a propellant charge so as to propel a projectile at high velocity. Provides stability and imparts spin to projectile.”

Answer 4

Barrel

Question 5

Answer 5

Question 6

Answer 6

Question 7

“The portion of the barrel in which the ammunition is inserted prior to being fired. It is of a larger diameter than the bore and houses the casing of the round while the projectile rest in the bore.”

Answer 7

Chamber

Question 8

“Interior of the barrel”

Answer 8

Bore

Question 9

What type of rifling do modern naval guns have?

Answer 9

Right-hand

Question 10

What does the spinning of the projectile do?

Answer 10

Gyroscopic rigidity, stabilizes the round

Question 11

“A tubular insert that can be replaced when worn”

Answer 11

Bore liners

Question 12

What are causes of eriosion to the bore?

Answer 12

Heating scouring the surface
Rapid heating and cooling
Hot gasses acting as high-velocity jets

Question 13

Where does most of the wear on the bore occur?

Answer 13

Near the breech where rifling begins.

Question 14

Why does bore erosion reduce muzzle velocity?

Answer 14

Gas escapes past the projectile, reducing pressure behind it.

Projectile may be rammed further into the gun, reducing the propeling in the chamber.?

Question 15

Answer 15

Question 16

Why must the muzzle be precise?

Answer 16

Question 17

“reduce the signature of a gun by cooling or dispesing the burning gasses that exit the muzzle. Not typically used on guns above 40mm due to added mass and recoil.”

Answer 17

Flash Suppressors

Question 18

“A device connected to the muzzle of a gun that redirects propellant gases to counter recoil and unwanted rising of the barrel during rapid fire”

Answer 18

Muzzle Brake

Question 19

“The part of the gun barrel that slides back and forth in a bearing mounted in the gun slide during recoil”

Answer 19

Sliding Cylinder.

Question 20

“The tapered area of the barrel, thicker walls to withstand higher pressure.”

Answer 20

Chase

Question 21

“The thinnest part of the barrel running from the chase to the muzzle”

Answer 21

Neck

Question 22

“Used on older guns. Metal is made thicker to discourage splitting.” (flaring out at the muzzle)

Answer 22

Bell

Question 23

Modern version of a bell, used when the liner is replaced, to anchro the tool for pulling the liner out.

Answer 23

Lug

Question 24

Two main categories of breech types

Answer 24

Screw type
Sliding block type

Question 25

What is the mechanism by which breeches work to seal the chamber?

Answer 25

Sealing by Expansion

Question 26

Answer 26

Question 27

Answer 27

Question 28

What is the advantage of a horizontally sliding breech block?

Answer 28

Don't have to fight against gravity

Question 29

"Opens the breech and operates the extractors during recoil"

Answer 29

Lever Breech Mechanism (LBM)

Question 30

"Prevents the breech block from slamming into place during recoil to prevent damage. Brings the block gradually to rest in the open position.

Answer 30

Breech Buffer

Question 31

"Lock the breech in place and hauls fired cartridge cases out of the chamber after firing."

Answer 31

Extractors

Question 32

"Imparts energy to the round required to initiate the propellant train"

Answer 32

Firing Mechanism

Question 33

What are the two types of firing mechanisms?

Answer 33

Electrical Percussive

Question 34

Designed to absorb and dissipate the forces generatedby firing and return the gun to the firing position.

Answer 34

Recoil System

Question 35

"Controls the length of recoil and the velocity of counter-recoil." Contails a mix of air and hydraulic oil which is compressed upon recoil, dissipating energy by hydraulic dampening.

Answer 35

Recoil Cylinder

Question 36

"Provides the force necessary to return the gun mechanism to the battery position, cock the rammer, and feed the new round"

Answer 36

Recoil Spring

Question 37

What are 3 cooling systems?

Answer 37

Water cooled Air cooled Multiple barrels (CIWS)

Question 38

"The process of aiming an artillery piece in training and elevation in order to aim at surface and air targets."

Answer 38

Gun Laying system

Question 39

Subsystem of Laying System: "Traverses the gun in the horizontal plane."

Answer 39

Training System

Question 40

Subsystem of Laying System: "Elevates and lowers the gun body in the verticle plane"

Answer 40

Elevating System

Question 41

"All components on the gun body that pass ready-use ammunition **to the firing point**"

Answer 41

Feed System

Question 42

How is the CIWS made mechanically safe?

Answer 42

Sector Holdback Tool Holds back cams so they do not chamber the rounds.

Question 43

"All components designed to store ammunition, transfer it to the gun mount, and handle ready-use ammunition **on the mount**"

Answer 43

Loading System

Question 44

What are components of the loading system on the 57mm?

Answer 44

Magazine, hoist system, rounds receiver, loading cassettes, intermediate magazines

Question 45

What are the major components of the gun mount?

Answer 45

Laying System Recoil System Slide Trunnions Carriage Stand Cupola

Question 46

"A cylindrical casting within which the gun slides axially in recoil and counter recoil."

Answer 46

Slide

Question 47

"Provide the pivot point for the elevating system"

Answer 47

Trunnions

Question 48

"The part of the mount that rotates in training."

Answer 48

Carriage

Question 49

"The stationary part of the mount which is bolted to the ship's structure"

Answer 49

Stand

Question 50

"Covers the gun and mounting to protect them from the surrounding environment." Often radar absorbant, made of glass reinforced plastic.

Answer 50

Cupola

Question 51

What are the components of a sliding breech mechanism?

Answer 51

Breech Ring Breech Block Lever Breach Mechanism (LBM) Breech Block Buffer Extractors Firing Mechanism

Question 52

What must a gun mount provide to the gun?

Answer 52

Support the gun body Elevation and training Recoil and counter-recoil control Protection from the elements