How long can a spitfire fire for?

A Supermarine Spitfire's cannon and machine guns could fire for approximately 30 seconds of continuous operation before overheating or running out of ammunition. The Spitfire was typically equipped with eight .303 Browning machine guns or, in later variants, a combination of machine guns and 20mm cannons, which limited sustained fire due to ammunition capacity. Pilots were trained to use short bursts to maximize effectiveness while avoiding overheating.