1. Caliber: Machine guns typically have a smaller caliber compared to cannons. Machine gun calibers range from 7.62mm to 12.7mm, while cannons usually start from 20mm and can go up to 30mm, 35mm, or even higher.
2. Rate of Fire: Machine guns have a higher rate of fire compared to cannons. They can fire hundreds or even thousands of rounds per minute, while cannons have a slower rate of fire, typically ranging from a few hundred to a few thousand rounds per minute.
3. Ammunition: Machine guns use smaller and lighter ammunition compared to cannons. Machine gun ammunition is typically belt-fed, while cannon ammunition comes in larger shells or cartridges.
4. Purpose: Machine guns are primarily used for defensive purposes, to provide suppressive fire against ground targets or enemy aircraft. Cannons, on the other hand, are designed for offensive operations and are used to destroy or damage enemy equipment, vehicles, and structures.
5. Range and Accuracy: Machine guns have a shorter effective range compared to cannons. Cannons, with their higher muzzle velocities and larger calibers, can achieve greater ranges, accuracy, and penetration power.
6. Integration: Machine guns are typically mounted on various locations of the aircraft, such as the wings, nose, or turrets, while cannons are often integrated into the aircraft's airframe or wing pylons.
7. Platforms: Machine guns are commonly found on a wider variety of military aircraft, including fighters, bombers, attack aircraft, and helicopters. Cannons are more prevalent on larger aircraft, such as fighter jets, attack aircraft, and gunships, due to their size, weight, and recoil.
8. Ammunition Capacity: Machine guns generally have a higher ammunition capacity compared to cannons. They can carry thousands of rounds, allowing for sustained firing over a longer period.
In summary, machine guns on military aircraft are characterized by their high rate of fire, smaller caliber, and defensive role, while cannons offer greater range, accuracy, and destructive power, making them suitable for offensive operations.