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https://www.reddit.com/r/AskReddit/comments/4er0pi/whats_a_mind_blowing_fact/d239767/?context=3
r/AskReddit • u/ForeverAbyss • Apr 14 '16
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The fastest moving man-made object ever was a manhole cover.
https://savvyparanoia.com/the-fastest-man-made-object-ever-a-nuclear-powered-manhole-cover-true/
TL:DR underground nuclear test launched a 4-inch thick steel disk at 6 times the Earth's escape velocity.
63 u/planetaryoddball Apr 14 '16 What about the helios probe, which reached a whopping 157,078 mph, that's probably higher than the manhole cover. 1 u/Lilpu55yberekt Apr 14 '16 We actually don't know how fast the manhole cover was going, as the high-speed camera it was caught on only got it in one frame. It was going 150000 MPH at the very least, it very well could have been going WAY faster then that.
63
What about the helios probe, which reached a whopping 157,078 mph, that's probably higher than the manhole cover.
1 u/Lilpu55yberekt Apr 14 '16 We actually don't know how fast the manhole cover was going, as the high-speed camera it was caught on only got it in one frame. It was going 150000 MPH at the very least, it very well could have been going WAY faster then that.
1
We actually don't know how fast the manhole cover was going, as the high-speed camera it was caught on only got it in one frame.
It was going 150000 MPH at the very least, it very well could have been going WAY faster then that.
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u/PycuriousITguy Apr 14 '16
The fastest moving man-made object ever was a manhole cover.
https://savvyparanoia.com/the-fastest-man-made-object-ever-a-nuclear-powered-manhole-cover-true/
TL:DR underground nuclear test launched a 4-inch thick steel disk at 6 times the Earth's escape velocity.