The M39 cannon is an American revolver cannon developed for use in jet aircraft during the 1950s. Designed by General Motors, the M39 is based on the German Mauser MG 213C and features a revolver-style mechanism that allows for a high rate of fire, approximately 1,500 RPM. It is chambered for 20x102mm ammunition and known for its reliability and effective performance in aerial combat. The M39 cannon was primarily installed in aircraft such as the North American F-100 Super Sabre, McDonnell F-101 Voodoo, and other Century Series fighters. Due to its compact size, enormous firepower and relative lightness, it is a popular option to retrofit into older fighter aircraft.
M39 Cannon
Autocannon
Abilities
Common Attributes - Mechanical
Auto
This weapon is fully automatic, either inherently so or by the presence of a selective-fire mechanism.
EFFECT:
This weapon can fire more than one shot each time it is used. Each subsequent shot has a progressive penalty.
Automatic weapons are considered STABLE when they're mounted on a vehicle, tripod or turret. This is different from the Stabilised SA.
- Point Blank Range - No penalty.
- Close Range (≤10m / 2sq) -> -1
- Short Range (≤50m / 5sq) -> -2 (STABLE: -1)
- Average Range (≤200m / 10sq) -> -3 (STABLE: -1)
- Medium Range (≤500m / 20sq) -> -5 (STABLE: -1)
- Long Range (≤1000m / 50sq) -> -5 (STABLE: -3)
~ Beyond this point, automatic fire is unfeasible without a STABLE firing platform. ~ - Very Long Range (≤2000m) -> (STABLE: -3)
- Extreme Range (>2000m) -> (STABLE: -5)
Belt-Fed
EFFECT:
This weapon is not fed from fixed capacity magazines, but from belts which can be made as long or short as needed.
Most machinegun belts contain 50, 100, 200 or 250 rounds. Some vehicle belts, however, can be way longer.
Unless specified otherwise, assume all small arms belts to be of 100 rounds.