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The Fastest Man-Made Object Might Be A Nuclear-Powered Manhole Cover Which Reached 125,000 MPH
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The Fastest Man-Made Object Might Be A Nuclear-Powered Manhole Cover Which Reached 125,000 MPH

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It’s always a good idea to throw out fun facts in conversations with family and friends, or better yet, new acquaintances. These make you sound smart, interesting, and you can make a good impression.

These can include a variety of things like, “Did you know that the tallest building in the world is the Burj Khalifa?” or “Did you know that the largest animal in the world is the blue whale?” or “Did you know that the fastest man-made object is a manhole cover?” Yeah, we didn’t believe that either. Until it became apparent that it was true. The more you know!

More info: Robert Brownlee | Nuclear Weapon Archive

RELATED:

    Back in the late 1950s, the US was conducting a lot of nuclear bomb tests under the name Operation Plumbbob

    Image credits: Public Domain

    A total of 29 tests were carried out in the Nevada Test Site from May to October of 1957. On August 27, 1957, around an hour before midnight, a test called Pascal-B (originally Galileo-B) took place. Like Pascal-A, it was a one-point criticality safety test of the same design. Except, it had a concrete plug similar to the collimator used in the Pascal A test, which was placed just above the device at the bottom of the shaft.

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    Image credits: iwishmynamewasmarsha

    The collimator was so close to the explosion that it was, quite literally, vaporized. The extremely heated gas quickly expanded and blasted towards the top of the shaft where a steel plate was in place. Needless to say, the plate did not conceal the explosion and instead skyrocketed into the heavens at a speed of 56 km/s, which is 201,600 kilometers or 125,268 miles per hour.

    Image credits: National Nuclear Security Administration

    In perspective, this is approx. five times faster than the Earth’s escape velocity or roughly 775 times faster than a 2019 Ford Mustang GT 5.0. High-speed cameras filmed the steel manhole cover as it was flying sky-high, but scientists never found it afterward. It is very unlikely that the object managed to leave Earth as it would simply not be able to retain its speed given its lack of aerodynamics and other physical earthly forces. The dominant theory is that it was way beyond the reach of any search party to find.

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    Image credits: Atomic Heritage Foundation

    So, the next time you need to spice up a conversation with a fun fact, go for the 125,000 miles per hour nuclear power propelled steel manhole cover.

    Here’s how people online reacted

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    Neringa Utaraitė

    Neringa Utaraitė

    Author, Community member

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    Neringa is a proud writer at Bored Panda who used to study English and French linguistics. Although she has many different interests, she's particularly drawn to covering stories about pop culture as well as history. While not at the office, this Panda enjoys creepy movies, poetry, photography and learning how to play the piano.

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    Neringa Utaraitė

    Neringa Utaraitė

    Author, Community member

    Neringa is a proud writer at Bored Panda who used to study English and French linguistics. Although she has many different interests, she's particularly drawn to covering stories about pop culture as well as history. While not at the office, this Panda enjoys creepy movies, poetry, photography and learning how to play the piano.

    Robertas Lisickis

    Robertas Lisickis

    Author, BoredPanda staff

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    Some time ago, Robertas used to spend his days watching how deep the imprint in his chair will become as he wrote for Bored Panda. Wrote about pretty much everything under and beyond the sun. Not anymore, though. He's now probably playing Gwent or hosting Dungeons and Dragons adventures for those with an inclination for chaos.

    Read less »

    Robertas Lisickis

    Robertas Lisickis

    Author, BoredPanda staff

    Some time ago, Robertas used to spend his days watching how deep the imprint in his chair will become as he wrote for Bored Panda. Wrote about pretty much everything under and beyond the sun. Not anymore, though. He's now probably playing Gwent or hosting Dungeons and Dragons adventures for those with an inclination for chaos.

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    xXKittensweetXx
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    boom put me on that thing and BLAST me off.. ill be in space.. or heaven.. either or is fine

    Jesper Rasmussen
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Would a metal object, going that fast through air, not burn up in a matter of seconds?

    Kenny Kulbiski
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Probably, Brownlee, the director of the project quickly got tired of the legend. His calculations were just off the cuff and didn't allow for atmosphere and other conditions. The cover only shows up partially in one frame and then disappeared. Probably vaporized. This is a pretty old story.

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    Ionescu Popa
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    And very interesting, the cap was hungarian. Be more ambitious guys, go directly to the romanian master - he appreciates these things.

    Load More Comments
    xXKittensweetXx
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    boom put me on that thing and BLAST me off.. ill be in space.. or heaven.. either or is fine

    Jesper Rasmussen
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Would a metal object, going that fast through air, not burn up in a matter of seconds?

    Kenny Kulbiski
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Probably, Brownlee, the director of the project quickly got tired of the legend. His calculations were just off the cuff and didn't allow for atmosphere and other conditions. The cover only shows up partially in one frame and then disappeared. Probably vaporized. This is a pretty old story.

    Load More Replies...
    Ionescu Popa
    Community Member
    5 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    And very interesting, the cap was hungarian. Be more ambitious guys, go directly to the romanian master - he appreciates these things.

    Load More Comments
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