5" Gun

Question 1

Give a brief description for the 5” Gun.

Answer 1

The 5-inch Gun subsystem is a fully-automated, single-barrel, rapid-fire weapon that can be used against shore targets, surface targets and aircraft flying at low altitude.

Question 2

What does the loading system consist of?

Answer 2

a. lower hoist,
b. loader,
c. mechanical fuse setter, and
d. slide-mounted components.

Question 3

Slide-mounted components consist of the:

Answer 3

1. cradle,
2. rammer,
3. breech mechanism,
4. recoil pistons,
5. counter-recoil pistons,
6. empty case tray, and
7. empty case ejector.

Question 4

The gun laying system consists of the:

Answer 4

train system and elevation system.

Question 5

The gun mount control system consist of the:

Answer 5

a. Power panel EP1
b. Control and test panel EP2
c. Display panel EP3 and
d. Gun Interface Cabinet (GIC)

Question 6

The structural components consist of the:

Answer 6

a. stand,
b. carriage,
c. slide,
d. gun barrel housing,
e. gun barrel, and
f. shield

Question 7

The 5” Gun subsystem is controlled by:

Answer 7

Remote control or Local control

Question 8

The 5-inch Gun subsystem has two modes of operation:

Answer 8

Automatic control mode and Step control mode.

Question 9

The automatic control mode allows the following selections:

Answer 9

a. Auto-load
b. Auto-unload
c. Auto-off load, and
d. Auto-strike-down

Question 10

What does the selection “Auto-load” do?

Answer 10

Automatically sequences the electrical, hydraulic and mechanical functions of the gun loading system. Rounds are moved from the lower loading station or upper loading station to the loader drum and/or breech without further manual switching.

Question 11

What does the selection “Auto-unload” do?

Answer 11

Reverses the upper loading system and automatically returns rounds from the cradle to the upper hoist.

Question 12

What does the selection “Auto-offload” do?

Answer 12

Reverses the lower loading system and automatically returns rounds from the upper loading station and intermediate stations to the lower loading station in the magazine for off loading.

Question 13

What does the selection “Auto-strike-down” do?

Answer 13

It is used mainly for re-arming. The lower accumulator emergency motor is used to reposition the lower hoist. The lower hoist then raises or lowers the storage tanks containing projectiles or powder cases between the magazine and the loader drum. The upper loading station, intermediate station and lower loading station must be empty before performing an Auto-strike-down.

Question 14

Brief description of Step Control Mode.

Answer 14

The step control mode allows five functions to be done manually, all except step-exercise must be done sequentially. The STEP CONTROL push buttons must be pressed in the correct loading sequence to allow the operation to be done.

Question 15

The step control functions are:

Answer 15

a. Step-load
b. Step-unload
c. Step-off load
d. Step-strike-down
e. Step-exercise

Question 16

What does the selection “Step-load” do?

Answer 16

Lets the control and test panel EP2 operator cycle rounds from the lower loading station to the loader drum or from the upper loading station to the breech.

Question 17

What does the selection “Step-unload” do?

Answer 17

Lets the operator unload rounds from the cradle to the upper hoist.

Question 18

What does the selection “Step-offload” do?

Answer 18

Lets the operator off load rounds from the upper loading station and the lower hoist intermediate levels to the lower station.

Question 19

What does the selection “Step-strike down” do?

Answer 19

This selection is used mainly during re-arming. The upper loading station, intermediate station and lower loading station must be empty before performing a step-strike-down.

Question 20

Give a brief description about the Lower Hoist…

Answer 20

The lower hoist is an endless chain hoist that transports ammunition from the gun magazine to the loader drum.

Question 21

Give a description about the Loader Drum…

Answer 21

The Loader drum receives and stows 5” rounds ready to be positioned for fuse setting and then ejection into the Upper Hoist. The Loader drum has 20 ammunition cells and each cell is magnetically coded so that the system and operators know the total amount and type of rounds in the drum.

Question 22

Give a description about the Fuse setter…

Answer 22

The Fuse setter is an electro hydraulic device installed on top of the loader drum above the transfer station. When setting mechanical fuses, the setter extends over the projectile and continually adjusts the fuse until the fire order is given, it then retracts to allow the round to be shifted into the upper hoist and cycled.

Question 23

Locate where the Cradle is with a small description…

Answer 23

The cradle is a pivoting tube located between and below the gun pivot points.

Question 24

Locate where the Rammer is with a small description…

Answer 24

The rammer is a chain-operated pawl inside the cradle.

Question 25

Locate where the Breech Mechanism is with a small description…

Answer 25

The breech mechanism consists of the breechblock, empty case extractor and gas ejector equipment, and is located above the gun barrel housing.

Question 26

Locate where the Recoil Pistons are…

Answer 26

One recoil piston is on each side of the gun barrel in front of the gun barrel housing.

Question 27

Describe where the Empty Case tray is located.

Answer 27

The empty case tray is on top of the slide, behind and to the right of the breech mechanism.

Question 28

Describe where the Empty Case Ejector is located.

Answer 28

The empty case ejector is located above the gun barrel housing, to the right of the breech.