Blk 7 GAU-2C

Question 0

barrels, bolts and removable tracks

Answer 0

Six

Question 1

Characteristics

Answer 1

Electrically driven
Air cooled
Multi-barrel weapon

Question 2

Capabilities

Answer 2

2000 rpm low rate
4000 rpm high rate
Pilot limited to 2000 rpm

Question 3

Effective range
Tracer Burnout
Max Range

Answer 3

1500
750
3000

Question 4

Limitation

Answer 4

Azimuth, elevation and depression.

Question 6

Advantages & disadvantages

Answer 6

Multi-Barrel design

Not a stand alone system, Requires external power source and ammunition storage to employ

Question 7

GAU-2C 10 Major Components

Answer 7

Rotor Assembly
Bolt Assemblies (6)
Removable tracks
Gun housing assembly
Safing Sector
Housing Cover
Guide Bar
Aft Gun Support/Clutch Assembly
Barrel Assembly
Barrel Clamp Assembly

Question 8

Rotor Assembly

Answer 8

Main structural component of the gun

Supported in the gun housing by annular ball bearings and supports the barrel cluster

Question 9

Bolt Assemblies (6)

Answer 9

Contain the firing pin action

Pick up a cartridge from the guide bar, camber and fire the round

Question 10

Removable Tracks

Answer 10

Provide a baring surface on the bolt assembly’s slide

Question 11

Gun Housing Assembly

Answer 11

provides a mount for the safing sector, housing cover, guide bar and gun drive motor

Question 12

Safing Sector

Answer 12

When removed, the bolt assemblies cannot be cammed into battery by manual or mechanical rotation of the barrels

Question 13

Housing Cover

Answer 13

Provides an inspection and service acces to the lot assemblies

Question 14

Guide Bar

Answer 14

Guide bar fingers direct the cartridges from the feeder de-linker to the extractors of the bolt

Question 15

Aft Gun Support/Clutch Assembly

Answer 15

Serves as a mounting point for the hand-grip assembly. Consists of an electrical solenoid gear and mecanical linkage to couple the clutch gear with the rotor and feeder assemblies.

Question 16

Barrel Assembly

Answer 16

Provide the aiming path for the projectile to follow after it has been fired

Question 17

Barrel Clamp Assembly

Answer 17

Steps along the barrel and at the muzzle provide mounting for the barrel clamp assembly

Question 18

GAU-2C 6 Accessories

Answer 18

Feeder/De-linker (Dillon Feeder)
AC Electric Drive Motor
Gun System Control Panel (GSC)
Gun Control Unit (GCU)
Electronic Control Unit (ECU)
Safing Bar

Question 19

Feeder/De-linker (Dillon Feeder)

Answer 19

Accepts the ammo from the ammo feed chute assembly, delinks the rounds, and feeds the rounds to the guide bar of the gun

Question 20

AC Electric Drive Motor

Answer 20

Assists the mechanical action of the machine gun by driving the rotor and when the clutch solenoid is activated the feeder de-linker

Question 21

Gun System Control Panel (GSC)

Answer 21

Left and Right switch determine the operational mode (FWD, SAFE, SIDE), MASTER ARM provides an arming signal to the LH/RH gun ECU.

Question 22

Gun Control Unit (GCU)

Answer 22

Mounts between the handgrips, provides an ICS push to talk switch, ARM switch, and HI and LO RATE trigger switches

Question 23

Electronic Control Unit

Answer 23

Primary power is supplied to each ECU via the GSC panel. AC gn drive motor and booster drive assembly are controlled by the staion ECU to provide 2 rates of fire. The ECU also provides a control signal to energize the clutch solenoid

Question 24

Safing Bar

Answer 24

Acts as a mechanical safe to prevent the gun from rotating

Question 25

GAU-2C Cycle of Operations

Answer 25

``` Feeding Chambering Locking Firing Extracting Ejecting Cocking Clearing ```

Question 26

Feeding

Answer 26

Firing Cycle begins when mechanical power is applied to the forward gear of the rotor assembly.

Question 27

Chambering

Answer 27

Round is chambered, the bolt assembly roller reaches the forward dwell portion of the elliptical cam.

Question 28

Locking

Answer 28

The bolt head is the allowed to rotate by the bolt head helix camping

Question 29

Firing

Answer 29

The firing pin spring drives the firing pin forward to strike the primer of the chambered round

Question 30

Extracting

Answer 30

The bolt head rotates back until its grooves align with the rotor tracks, the bold assembly continues to move rearward along the reverse segment of the elliptical cam path to extract the case from the chamber

Question 31

Ejecting

Answer 31

As the bolt assembly reaches its rear dwell position on the rotor, the case is eject by the guide bar

Question 32

Cocking

Answer 32

The bold assembly has completely cycled thru the elliptical cam path all six bolt assemblies repeat this cycle while power is applied to the front gear of the rotor assembly

Question 33

Clearing

Answer 33

The clutch solenoid remains energized for 40 msec then de-energizes to de-clutch the feeder assembly. The booster drive remains energized for 80 msec to prevent the ammo belt from desengaging the feeder. The gun drive remains energized for 400 msec, which allows the gun to clear by firing the remaining rounds.