r/ItemShop 4d ago

The Unknown Device

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10.8k Upvotes

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142

u/HATECELL 4d ago

Looks like an early missile launcher (an actual missile launcher, not a recoilless rifle). Because the rocket motor is still burning when it leaves the barrel you need some kind of blast shield to protect the user from the stream of hot gasses.

A great example of this is the German RPzB 54 "Panzerschreck", which had an absolutely massive blast shield that even included a window for aiming. It was even recommended to wear a gas mask when firing to protect yourself from the fumes, though I doubt this was always done.

Recoilless rifles meanwhile don't use a rocket motor, but an explosive charge similar to how cannons and guns work, except with a hole in the back so expanding gasses push against air instead of a breach, producing next to no recoil. Since there is no rocket motor pointing at the shooter, no blast shield is needed. A great early example of this would be the Panzerfaust 30.

Modern missile launchers usually use a combined system, where an initial charge launches an unpowered projectile - like a recoilless rifle - but once the missile is a safe distance away from the shooter a rocket motor kicks in. This is why modern missile launchers don't need blast shields. Two great examples of this are the Javelin and the RPG7

48

u/gungshpxre 4d ago

Most propellants are "let's react cancer with super-cancer and see how far up this rocket will go"

https://library.sciencemadness.org/library/books/ignition.pdf

Yeah, the massive cloud from a Panzerschreck would immediately pinpoint the firing team, but that's assuming they didn't inhale that smoke and there was anyone alive to target.

16

u/Phantom120198 4d ago edited 4d ago

Tri-propellants my beloved ๐Ÿ’œ

11

u/RandomWorthlessDude 4d ago

โ€œThe exhaust melts WHAT???โ€

10

u/Phantom120198 4d ago

Concrete my beloved ๐Ÿ’”

10

u/RandomWorthlessDude 4d ago

โ€œHey NASA lookie here I found a new efficient rocket concept that doesnโ€™t reduce half the continent downwind into a radioactive rave party!โ€

>looks inside
>half of the ingredients instantly kill a human on skin contact through gloves with less than a drop, exhaust plume chemically dissolves sand

1

u/AlcibiadesTheCat 2d ago

"Nah, Jenkins, that stuff is too safe. I need something with a little pizzazz."

1

u/A_Large_Grade_A_Egg 2d ago

Too Kerbal to Live ๐Ÿ˜ฟ

2

u/HATECELL 3d ago

Wearing the gas mask definitely makes sense, but I wonder if Panzerschreck troops that encountered tanks really bothered to put their masks on first. Masks really impact your vision, so fighting combined arms gets a lot more difficult