Operation Upshot-Knothole Grable shot Remaster footage

The 2nd of four gun-type device tests. Fired from the M65 Atomic Cannon "Atomic Annie" 11 km (6.8 mi) downrange. 280mm shell, 365 kg (805 lb). Detonation at 200 feet (61 m) SW of target. Desert Rock V. Major effects test. 15 kilotons

[@StewieGriffin505]

Could you please add black space at the end for the recommended videos? They obscure the last part of the mushroom cloud.

[@beachlife4704]

That's a good idea.

[@MrKloetenklaus]

good idea, nobody had thought to ask that before🤔

[@Optim121]

ublock origin > right click > block element > select those videos and block them

[@htos1av]

Man, you can feel the neutrinos coming through the screen in 4k/245hz

[@josephastier7421]

Those are neutrons.

[@tokencivilian8507]

Fantastic as always ATC. The 2nd view, where you can really see the fireball...wow!

[@LuciusVulpes]

My favorite test.

[@EK14MeV]

Why have the fireball cut interrupt a beautiful sequence?

[@davida.p.9911]

Was this the one fired from "Atomic Annie"? Beautiful shot, nevertheless.

[@glennquagmire7696]

Yes. The cannon was only used once.

[@theschmedaparadox1018]

Perfect for the battlefield

[@ScotSapper2208]

This looks very similar to the atomic cannon explosion, is it the same one?

[@ModestO20]

yes

[@P-G-77]

Incredible... fantastic... nice job.

[@oceanhome2023]

That bright light is truly “Unearthly “ not of this world !

[@JoelPerez-tn4yw]

❤❤❤

[@gabrielc6252]

What's with that dark smoke before the explosion ?

[@jameswilkes451]

They use those clouds and the smoke lines to measure the speed and effects of the shockwave.

[@rtqii]

Watch the official Upshot-Knothole video. The white smoke is oil fog and the black smoke is carbon soot. They were testing these materials (fogs or smoke dispersion) to see if it would absorb some of the thermal effects from the blast. It worked, but the tests were difficult because the breeze dispersed a lot of the smoke before the shot was fired. They ran this same test on several shots in this series.

[@gabrielc6252]

@@rtqii Cool, thanks for the info

[@joseeduardobrazdasilva117]

The same kiloton Hiroshima?

[@rtqii]

Exactly - The Little Boy and shot Grable above both proofed at 15kt

[@sockmonkey22]

0:20 to 0:25 it looks like a giant jellyfish.

[@blackpoolbootz2790]

Would be excellent to see in real life

[@matthewnotonline3366]

just give it time, the US military might give you not only a front row seat, but also a free gun !

[@rtqii]

@@matthewnotonline3366 Trump might.

[@MikeHunt-rw4gf]

Algorithm.

[@Aventador30]

Russian Russians are suffering terrible losses, 290,000 Russians have been killed.😢😢

[@alexandercarder2281]

😢 I’m very sorry to hear this 😢

[@shawnmiller4781]

Lesson here, don’t start wars

[@emilkarpo]

Lol cope Avie not even close.

[@tacitblue1973]

They just need to go home to Russia. Problem solved.

[@stuntmanmike37]

What was all the smoke and dust near ground zero prior to detonation? Was that for blast analysis?

[@jasonburdette9921]

They used white and black smoke as a test to see if the light from the blast would deflect or absorb the heat. The rocket you see that are launched seconds before the blast. That is what they used as a grid to measure the width of the blast.

[@htos1av]

All that data has long been transcribed directly to a digital database, useful for running simulations on supercomputers, which is how designs for hardware are calculated.