In IRL, reactive armor is a type of armor, that is created to defend the tank from non-explosives kinetic perpetrators penetrators, by blowing away the projectile with the detonation of a high explosive.

My idea is to ionize a small portion of air in front of the bullet, then smeck it into the projectile with a strong magnetic field, then repeat this until the bullet stops or reaches you, but with a decreased kinetic energy.

Would such precise (read:German) system be possible?

  • 1
    $\begingroup$ With all your interest in plasma, maybe you should just learn magnetohydrodynamics. $\endgroup$
    – JDługosz
    Jul 17, 2017 at 16:16
  • $\begingroup$ @JDługosz The moment when I realized, why XKCD has an entry on that wiki. $\endgroup$ Jul 17, 2017 at 16:24
  • 1
    $\begingroup$ What? I don't understand what you're saying. $\endgroup$
    – JDługosz
    Jul 17, 2017 at 16:57
  • $\begingroup$ xkcd.com/1851 @JDługosz $\endgroup$
    – apaul
    Aug 22, 2017 at 15:58

1 Answer 1


Sorry, but Boeing beat you to it.

Boeing's Force Field

Although it doesn't protect you from bullets, it can detect shockwaves from an explosion and ionize air to deflect the shockwave. Here is the video of how this works: https://www.youtube.com/watch?v=SOmUhjlfh1o

However, sorry to pop the excitement, people doubt that this will even work as of now it is still only a patent and they might haven't build the real thing themselves.

It still looks cool, though.

  • $\begingroup$ @RedactedRedacted thanks for the edit. I don't know there's a "mobile" version by adding m to the end of the filename. $\endgroup$
    – Vylix
    Jul 16, 2017 at 14:30
  • $\begingroup$ They always tell me, that plasma bubbles would rapidly expand (just like an explosion) without a magnetic field keeping them together. So, I had the idea to replace the explosion with plasma explosion and add some magnetic assistance to it, for the extra power. $\endgroup$ Jul 16, 2017 at 14:36

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