this post was submitted on 04 Aug 2025
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[–] NaibofTabr 25 points 2 days ago* (last edited 2 days ago) (26 children)

Don't they drive a car? and ride a train? so combustion works... kind of has to work

[–] Ilovethebomb@sh.itjust.works 4 points 2 days ago (14 children)

Combustion, sure, but not an explosion. Or the car is a special magic car or whatever.

[–] dohpaz42@lemmy.world 19 points 2 days ago* (last edited 1 day ago) (10 children)

Combustion, sure, but not an explosion.

~~I hate to do this to you, but that’s kind how explosions work (i.e. combustion).~~

Edit: I should’ve done my homework.

[–] ccryx@discuss.tchncs.de 10 points 2 days ago (1 children)

More specifically, that's how cars with a combustion engine work: lots of tiny explosions.

[–] Ilovethebomb@sh.itjust.works 1 points 2 days ago (1 children)

No, they're a combustion event. An actual explosion (detonation, pre ignition) is really bad news for an engine.

Firearms use a self oxidising propellant, so it would be quite easy to say that just doesn't work.

[–] rtxn@lemmy.world 5 points 2 days ago (2 children)

What, pray tell, do you think is in gunpowder? It's not magic dust that goes bang. It's a pre-mixed, pre-compressed mixture of fuel and oxidiser. When used in a gun, whether it's a muzzle-loader or a cartridge, the confined combustion of the mixture generates thermal energy and expanding gases that impart kinetic energy on a moving component (the piston or a projectile). The only difference is that the combustion event in an ICE is subsonic (deflagration) while the combustion in a gun is supersonic (detonation).

[–] dohpaz42@lemmy.world 2 points 1 day ago

@Ilovethebomb@sh.itjust.works is correct.

I should’ve done my homework before going all “well akshullay 🤓” on them (sorry!).

The only similarities between the two is that they both are chemical reactions that produce a rapid release of energy. But past that, they are much different in how they get to that point.

[–] Ilovethebomb@sh.itjust.works 3 points 2 days ago (1 children)

The only difference is that the combustion event in an ICE is subsonic (deflagration) while the combustion in a gun is supersonic (detonation).

So what you're saying is there's a fundamental difference between the two?

[–] rtxn@lemmy.world 2 points 2 days ago* (last edited 2 days ago) (1 children)

Yes, there are differences. That's why one is called deflagration and the other is called detonation. Good job, you can read. But the chemical and thermodynamic processes are identical, and that's what you seem to misunderstand.

[–] Ilovethebomb@sh.itjust.works 1 points 2 days ago (1 children)

Dude, you're being a pedant in the comments of a Harry Potter shitpost.

[–] davidagain@lemmy.world 1 points 2 days ago* (last edited 2 days ago)

And you're not?

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