30mm Gun (GAU-23) Flashcards
Characteristics of the 30mm Gun (GAU-23):
Air-cooled Single Barrel Open Bolt Percussion-fired Chain-driven Belt fed Fires in either single or automatic-fire modes Located in the #1 gun station on the AC-130W Side eject modified 200 shots per minute (SPM) Firing rate (single or rapid) manually selected by gunner Powered by a 1hp 24 V dc motor
The 30mm gun provides fire against personnel, soft targets and light armor with ___________ _________
pinpoint accuracy
The 30mm may be preferred for _________ ________ _________ (______) because of its small fragmentation pattern
close air support (CAS)
The 30mm is capable of ______ shots per minute in the automatic setting
200
The 30mm consists of these 3 major components:
Barrel Assembly
Receiver Assembly
Feeder Assembly
The barrel assembly of the 30mm consists of these three parts
Barrel (with barrel alignment arrows)
Blast Diffuser
Shroud Bushing
Housing which supports various subassemblies of the 30mm:
Receiver Assembly
Part of the receiver assembly that has ring springs to absorb the recoil load and a hydraulic damper valve to control counter recoil
Recoil Mechanism
Part of the receiver assembly that stops guns in MISFIRE position if gun does not recoil
Mechanical Interlock
Part of the receiver assembly that transfers the recoil load to receiver mounting lugs which transfers load to the turret
Barrel Support Assembly
Part of the receiver assembly that is actuated by sear solenoid and sear push rod. Locks the gun in SEAR and MISFIRE positions by contacting master and sear links in the chain.
Sear Assembly
Part of the receiver assembly that restrains master and safety links from cycling backwards
Sear Catch Assembly
Part of the receiver assembly that converts rotational movement of the chain into linear movement (forward and aft). Rides in left side receiver and guide rod and houses the firing pin assembly
Bolt and Carrier Assembly
Part of the receiver assembly that is a mechanical counter actuated by recoiling breech. Does not record dry cycled rounds
Round Counter Assembly
Part of the receiver assembly that locks with the bolt and barrel to contain firing pressure
Breech Assembly
Part of the receiver assembly that contains the safety pawl and firing pin pawl
Track Assembly
Part of the track assembly that prohibits the firing pin from dropping when the safety is engaged. Safety handle cannot be disengaged with firing pin held against this.
Safety Pawl
Part of the track assembly that cocks the firing pin/prevents forward movement of the firing pin as the bolt carrier moves forward
Firing Pin Pawl
Part of the receiver assembly that is seated in the bolt carrier cross-slot to drive the bolt carrier. Held by the sear to stop the gun in the SEAR position
Master Link and Slider
Part of the receiver assembly held by the sear to stop the gun in the MISFIRE position if the round does not fire
Safety Link
Part of the receiver assembly that rotates, which raises and lowers the safety pawl
Safety handle and actuator