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I imagine the recoil of a powerful machine gun or cannon would decelerate a plane significantly. Is this an issue?

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  • $\begingroup$ Short version of the answer: No. $\endgroup$
    – Therac
    Jun 6 at 10:19
  • $\begingroup$ Significantly? No. Compare the mass of the ammunition being fired to the mass of the aircraft. For a .50 caliber, typical bullets weigh about 40-50 g. Say the gun fires 20 bullets per second, that's about 1 kg per second. A typical fighter, say an F-16, weighs something over 9000 kg. Muzzle velocity would be about 900 m/s, vs a subsonic (jet) speed of 200-300 m/s. $\endgroup$
    – jamesqf
    Jun 6 at 17:17