Aircraft Gun Systems
F-35 Lightning II 25mm Gun System
General Dynamics Ordnance and Tactical Systems has been awarded a system development and demonstration contract by Lockheed Martin Aeronautics Company to design, produce and integrate the gun systems for the F-35 Lightning II stealth fighter.
GD-OTS is developing the GAU-22/A for the internal and external gun systems based on a derivative of its GAU-12/U 25mm Gatling gun. An internally mounted gun system will arm the F-35A Conventional Takeoff and Landing aircraft variant and a removable or “missionized” externally mounted gun system will arm the F-35B Short Takeoff and Vertical Landing and F-35C Carrier-Based aircraft variants.
Internal Gun System
The F-35A gun system will include the GAU-22/A derivative gun, a linear linkless ammunition feed system, a gun system control unit and a 4,000-pounds-per-square-inch hydraulic drive assembly.
External Gun System
The missionized gun system designed for the F-35B and F-35C will be hard-mounted to the centerline station of the aircraft. This gun system will include the CTOL-common GAU-22/A derivative gun, a gun system control unit and drive assembly, and a helical linear linkless ammunition feed system contained in a conformal pod.
Four-barrel, 25mm, externally powered
|Weight (without ammunition)||
|Internal system||416 pounds (189 kg)|
735 pounds (334 kg)
|Rate of fire||
3,000 shots per minute
5 milliradians diameter, 80 percent circle
|(TP, HEI ammunition)||3,560 feet (1,085m) per second|
|(API ammunition)||3,400 feet (1,036m) per second|
|Average recoil force||
4,000 pounds (17.8 kN)
Conventional linear linkless (CTOL), helical