this post was submitted on 18 Oct 2025
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Science Memes

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top 34 comments
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[–] supersquirrel@sopuli.xyz 61 points 2 months ago* (last edited 2 months ago) (2 children)

Also if you need your arrows to land all at the same time so you can fool the enemy into thinking you are many archers fire like this.

[–] NeatNit@discuss.tchncs.de 49 points 2 months ago (1 children)

bottom projectile traveling at mach 5

[–] Tja@programming.dev 12 points 2 months ago (2 children)

Bottom projectile is traveling at a normal speed, just fired last.

[–] KoboldCoterie@pawb.social 30 points 2 months ago (2 children)

Then the distance must be almost zero, as it exhibits no drop over that range.

[–] Cawifre@lemmy.world 25 points 2 months ago (2 children)

That might have something to do with this being a chart for powered missiles.

[–] KoboldCoterie@pawb.social 10 points 2 months ago (2 children)

However, the comment was talking about arrows...

[–] HowAbt2day@futurology.today 18 points 2 months ago

I’m over here with some popcorn as nerds debate the project motion of a hypersonic missile named “arrow” and shit.

[–] ulterno@programming.dev 0 points 2 months ago

Go with a fantasy arrow made of light, for the last one.

[–] FishFace@piefed.social 4 points 2 months ago (1 children)

The diagram is about normal unpowered shells. They use different amounts of propellant to achieve different projectile speeds

[–] Cawifre@lemmy.world 3 points 2 months ago (1 children)

Y'know, I think you're right. That gray bit looks like the tank barrel. I mistook that as part of the projectile path, and I misinterpreted the overall design as a missile battery.

[–] FishFace@piefed.social 2 points 2 months ago

If you want to know more, look up Multiple Round Simultaneous Impact

[–] Tja@programming.dev 5 points 2 months ago (1 children)

I see a significant drop...

[–] KoboldCoterie@pawb.social 2 points 2 months ago

Are we looking at the same image? DO I NEED TO GET A RULER?

[–] FishFace@piefed.social 1 points 2 months ago (1 children)

That is not how this concept, time on target, works

[–] Tja@programming.dev 1 points 2 months ago (1 children)

It works by firing at mach 5?

[–] FishFace@piefed.social 2 points 2 months ago

It's easier to just refer to "multiple round simultaneous impact" than to try to explain succinctly, especially since I already got the term kinda wrong (time on target is more of an umbrella category/earlier version)

[–] niktemadur@lemmy.world 2 points 2 months ago

I wanna see a reverse brachistochrone!

[–] tyler@programming.dev 54 points 2 months ago (2 children)

Did nobody else notice that they’re pointing the bow lower than 45° but the line is drawn slightly upwards up compensate?

[–] jol@discuss.tchncs.de 26 points 2 months ago

If you keep falling short, cheat. Or if you keep falling short, your rich parents will prop you up.

So inspiring.

[–] OddMinus1@sh.itjust.works 4 points 2 months ago

Also, the arrow has some serious gliding effect on its way down.

[–] zxqwas@lemmy.world 26 points 2 months ago (1 children)

In a frictionless vaccuum 45° would be max range.

[–] SatansMaggotyCumFart@piefed.world 11 points 2 months ago (1 children)

Yeah you actually want a bit less then that.

[–] Ooops@feddit.org 14 points 2 months ago* (last edited 2 months ago)

Unless you use modern artillery. Then you want to aim even higher because at those ranges/heights it's beneficial to reach less dense air layers quickly.

[–] SpaceCowboy@lemmy.ca 11 points 2 months ago (1 children)

The optimal launch angle would only be 45 in a vacuum. It'll be lower if you're on Earth where there's air resistance.

[–] ulterno@programming.dev 3 points 2 months ago* (last edited 2 months ago)

Yeah, that's why try multiple times and aim higher every time until 45°
Once you reach that, if you are still falling short, you know you have no chance, unless you increase the launch speed.

Of course, you can try to properly calculate drag for each projectile and set that as the maximum, but it's fine for a one-off, assuming you have enough arrows to try again.

[–] innermeerkat@piefed.social 3 points 2 months ago* (last edited 2 months ago) (1 children)

Instructions unclear and took an arrow in the knee

[–] Ceruleum@lemmy.wtf 1 points 2 months ago

It's supposed to end up in the butt.

[–] snoons@lemmy.ca 3 points 2 months ago (2 children)
[–] ininewcrow@lemmy.ca 4 points 2 months ago (1 children)

Unless you can achieve a certain amount of force .... then you can get a stable orbit around the planet

[–] CannonFodder@lemmy.world 4 points 2 months ago (1 children)

Not unless you have something to alter the trajectory in flight.

[–] snoons@lemmy.ca 3 points 2 months ago

EEXXPLOSSIIOONSS??!

[–] RedBauble@sh.itjust.works 2 points 2 months ago

CAN WE GET MUCH LIGHTER

[–] niktemadur@lemmy.world 3 points 2 months ago

And if you still can't reach it, ask your god or gods for help,
as it's beyond the reach of Mr Newton or even Herr Leibniz.

[–] NigelFrobisher@aussie.zone 1 points 2 months ago

That’s only about 30 degrees.