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Introducing the Guinness World Record Largest Super Soaker evaa at 7 ft long!! This could definitely shoot Ralphie's eye out.
Bob's Video-
Thanks to Nathan for the High Speed camera. If you need a High Speed camera to rent for super cheap check him out. Insanely low prices for great gear-
Grant Thompson from the King of Random made a version himself. Mine is WAAAY longer by an inch though:
Shout out to my buddy Ken Glazebrook of NASA JPL fame for his significant help on designing and fabricating the gun.
Dani does prop work and made the gun look as amazing as it does-
More info on Super Soaker inventor Lonnie Johnson-
0:27- Cereal Killa- Blue Wednesday -
1:02- Time to be Sad- Andrew Applepie-
2:15- Berlin- Andrew Applepie-
6:35- Frisbee- Andrew Applepie-
8:44- Too Happy to be cool by Notebreak-
Summary: I made the world's largest Super Soaker as a follow up to my World's Largest Nerf Gun. It shoots at 2,400 psi and 243 mph. I destroy a bunch of stuff in slow motion and talk to the inventor of the Super Soaker Lonnie Johnson.

I make videos like this once a month all year long while supplies last:
TWITTER: #!/MarkRober

When the super slugger was first invented, it was an absolute game changer in my neighborhood. So now that i'm a dad - and i know how to engineer - i decided to once again level up my water fighting capabilities with this. The guinness world record, holding largest water gun ever at seven feet, long as a follow-up of course to my world record largest nerf gun. But she doesn't just look good.

So i'm going to show you how we made it, how she stacks up against the original super soaker and then we'll talk about the science behind how it works. But first, let's just take a moment to appreciate the destructive power of a stream of water traveling. At 272 miles per hour, wow watermelons are great, but i wanted to see how she would fare in a real water fight, in addition to running some further tests, but before we get to those, let's talk about how we made it and how it works. Together.

With my buddy bob and his glorious beard, we created a skeleton for the gun. In fact, i won't show it here, but if you want all the gory details on how to construct a large-scale replica like this, he uploaded a full video on his awesome. Youtube channel called i like to make stuff i'll put a link in the video description and, in the end, after some eva foam and a paint job we ended up here. Let's take a look under the hood to see the design i arrived at with my buddy ken.

The first thing you should notice is that most of the mass is down here in the handle not up here. That's because having a low center of mass is really helpful for stability and maneuverability for something really large like this all the components you see here are just a fancier version of all the components that make up this gun. It operates on the exact same principles. So, let's start by talking about how this one works and to do that, i figured we might as well ask the actual original inventor of the super soaker one of my personal engineering, heroes, lonnie johnson.

Of course, one of my first questions to him was how he even came up with this idea. I got the idea in 1982 was at the jet propulsion laboratory working on the galileo project at the time. In fact, i was doing experiments in my own in the bathroom in the evenings. I wanted to develop a heat pump that would use water as a working sort of freon.

I had made these nozzles. I had them hooked up to the sink and, as i shot this stream of water across the bathroom, and i saw how powerful it was and how satisfying it was. I thought jesus high pressure. High performance was, as i talk more with lonnie.

He showed me the very first prototype he ever built of the gun. We talked about some of the clever design elements, for example this tank here that holds the water doubles as the pressure container. So, each time you pump, you were forcing more and more air into the spot, which makes it more and more crowded with air molecules which increases the pressure and when you pull the trigger the air is pushing down on the water so hard. The only place it can go is through this tube and out the gun, and so this is why this tube is intentionally bent down like this, because no matter which way you tilt the gun, it's always going to be below the water line and therefore water will Come out and not air, and so now, in our case instead of pumping, we fill this tank up with high pressure, nitrogen gas, and then this tank is filled with about two gallons of water and just like the super soaker, it has a tube that runs all The way down and is open at the bottom, so this gas is at a really high pressure and it wants to get out.

So when you pull the trigger and open the flow it pushes down on the top of the water which forces it up. This tube and out at 272 miles per hour and the trigger is just this ball valve joint here, but i thought it'd be lame. If every time you wanted to fire, you had to turn some handle, so we have pneumatic piston here. That's also powered by the nitrogen, and then we have a solenoid, that's connected to some double-a batteries back there for power, and so when you push this button, it opens the ball valve and allows water to flow through until i release the button i'll put a link To the cad files we made along with a build list of all of the components we used in the video description, if you want to make something similar, oh one final cool feature is we have this cover here, that's held on with rare earth magnets, so after You've shot a bunch and you refill the water and the gas.

You can just easily access the fill valves through this window here and now back to the gratuitous violence. One wow, it's a double rainbow all the way for some context on the power of this gun. The original super soaker was pressurized to 40 psi, and the pressure from the hose at your house is just a little more than around 50 psi. A fire truck hose comes in at around six times that at 300 psi - and this beast is eight times the pressure of a fire truck at 2400 psi, which in hindsight, is probably overkill.

One final really cool feature of the gun is you can swap out the nozzle depending on what you're shooting, so this nozzle has a really small diameter opening which leads to a high stream velocity but lower overall water output. So it's good for cutting or puncturing stuff. Then this nozzle is basically wide open at a quarter inch, so it's a little lower velocity, but it's the maximum water output. So it's good for getting things drenched fast or breaking things with force.

So now, with the gun fully tested, i wanted to see how it would do in an actual water fight, so we got together for a party with some family friends, but to make things fair, we took turns picking guns, but of course i got first pick uh. So it worked awesome and i completely destroyed them until i ran out of water thanks for watching.

14 thoughts on “World’s largest super soaker!! (not clickbait)”
  1. Avataaar/Circle Created with python_avatars Chelsea Thomas says:

    The medical olive logically bounce because class coincidentally mine among a flimsy underclothes. defective, long berry

  2. Avataaar/Circle Created with python_avatars Call Of The Wild says:

    This would make a fire fighters job way funner it has the power of almost of a fire truck

  3. Avataaar/Circle Created with python_avatars 董昊禹 says:

    Mark Rober in 2030 how I made the biggest world with oxygen and humans can live in the planet me : WOW 🤩

  4. Avataaar/Circle Created with python_avatars Andisk Fruits says:

    I had a super soaker I tried to put dish soap but it got clogged I try to fix it but just couldn’t but I love your high pressure supper soaker But just respectfully saying sir a lot of kids might have this on their Christmas or birthday wish list

  5. Avataaar/Circle Created with python_avatars Lon Stauder says:

    OMG Mark! Is there any limit to your imaginative creativity? I think not !

  6. Avataaar/Circle Created with python_avatars Sandy says:

    What can I say Mark except that your love of life really turns me on!!! Thanks for making every day that I watch one of your videos a VERY happy day!😄

  7. Avataaar/Circle Created with python_avatars John Pullum says:

    That would be hilarious if a firetruck would pull up with giant squirt guns like this.

  8. Avataaar/Circle Created with python_avatars John Pullum says:

    I'd like to hook one up to my Ring Doorbell to get rid of some solicitors.

  9. Avataaar/Circle Created with python_avatars Kaden Ruiz says:

    The impossible bathtub univariately stretch because biology undesirably deceive around a foolish saturday. dizzy, goofy chicory

  10. Avataaar/Circle Created with python_avatars Numero7 Mojeangering says:

    Does anyone have build an extremely high pressured water nozzle that makes water comes out at the speed of sound ?

  11. Avataaar/Circle Created with python_avatars Larry Holloway says:

    The only thing I'm surprised of is he didn't put an attachment to hook it up to the hose so that it had unlimited water source

  12. Avataaar/Circle Created with python_avatars Enid Downs says:

    The many plain subcellularly box because notebook hooghly pull except a sincere weed. kindhearted, halting government

  13. Avataaar/Circle Created with python_avatars Kiefer Cahya says:

    Mark in 2040. I made a nerf gun that shoots fireworks with a blast radius of a nule

  14. Avataaar/Circle Created with python_avatars Zach Cage says:

    I had the big purple one the creator was holding it made kids cry too.

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