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Blk 1-7 > Blk 7 GAU-2C > Flashcards

Blk 7 GAU-2C Flashcards

0
Q

barrels, bolts and removable tracks

A

Six

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1
Q

Characteristics

A

Electrically driven
Air cooled
Multi-barrel weapon

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2
Q

Capabilities

A

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

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3
Q

Effective range
Tracer Burnout
Max Range

A

1500
750
3000

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4
Q

Limitation

A

Azimuth, elevation and depression.

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6
Q

Advantages & disadvantages

A

Multi-Barrel design

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

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7
Q

GAU-2C 10 Major Components

A 
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
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8
Q

Rotor Assembly

A

Main structural component of the gun

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

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9
Q

Bolt Assemblies (6)

A

Contain the firing pin action

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

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10
Q

Removable Tracks

A

Provide a baring surface on the bolt assembly’s slide

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11
Q

Gun Housing Assembly

A

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

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12
Q

Safing Sector

A

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

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13
Q

Housing Cover

A

Provides an inspection and service acces to the lot assemblies

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14
Q

Guide Bar

A

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

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15
Q

Aft Gun Support/Clutch Assembly

A

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.

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16
Q

Barrel Assembly

A

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

17
Q

Barrel Clamp Assembly

A

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

18
Q

GAU-2C 6 Accessories

A 
Feeder/De-linker (Dillon Feeder)
AC Electric Drive Motor
Gun System Control Panel (GSC)
Gun Control Unit (GCU)
Electronic Control Unit (ECU)
Safing Bar
19
Q

Feeder/De-linker (Dillon Feeder)

A

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

20
Q

AC Electric Drive Motor

A

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

21
Q

Gun System Control Panel (GSC)

A

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

22
Q

Gun Control Unit (GCU)

A

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

23
Q

Electronic Control Unit

A

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

24
Q

Safing Bar

A

Acts as a mechanical safe to prevent the gun from rotating

25
Q

GAU-2C Cycle of Operations

A 
Feeding
Chambering
Locking
Firing
Extracting
Ejecting
Cocking
Clearing
26
Q

Feeding

A

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

27
Q

Chambering

A

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

28
Q

Locking

A

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

29
Q

Firing

A

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

30
Q

Extracting

A

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

31
Q

Ejecting

A

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

32
Q

Cocking

A

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

33
Q

Clearing

A

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.

Blk 1-7 (12 decks)

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