The Coke Zero & Mentos Rocket Car: Early Experiments

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Driver on closed track. Don’t try this without professional help.

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About The Coke Zero & Mentos Rocket Car: Early Experiments
Not all the experiments EepyBird attempts are, umm, well, spectacular successes.  Every experiment is an important part of discovering the limits of what is possible, and the experiments where things don’t work are the most important.


Here are some of the steps along the way to building The Coke Zero & Mentos Rocket Car, which finally achieved our goal: propelling a human over 200 feet on Coke & Mentos power!  But we started with less spectacular results…

How Does This Work?
This is one not to try at home.

The Coke Zero & Mentos Rocket Car uses a piston mechanism: a six-foot long rod sits inside a six-foot long tube attached to each bottle of Coke Zero. When the Mentos drop into the soda, the pressure tries to push the rod out of the tube. With 108 rods all pushing at once, that gives us a lot of power.

All that power is pushing against a wall braced with 3,600 pounds of cement blocks. So all the force is directed into moving the Coke Zero & Mentos Rocket Car forward. We get one big push for six feet, and then it’s all coasting from there.

Want to know what makes the soda fly out of the bottle? Will you explode if you drink Coke and eat Mentos? Click here to find out!

Don’t Try This at Home!
Seriously, don’t try this at home. There is a huge amount of power involved, and we don’t want you to get hurt.

What you can (and should) try at home is the Coke & Mentos geyser: you can get your own Coke & Mentos Kit, which includes nozzles just like the ones we use in our geyser videos, or you can click here to learn how you can make Coke & Mentos geysers with stuff from around your house.

Credits
The Coke Zero & Mentos Rocket Car: Early Experiments by EepyBird: Fritz Grobe (the short one) and Stephen Voltz (the tall one). Music by AudioBody. Filmed in Buckfield, Maine, home of the Oddfellow Theater. Special thanks to the experimental research team: Mike Miclon, Matt Tardy, and Jason Tardy. And thanks to Coca-Cola Zero and Mentos for making this possible!

  • Pingback: Mentos Powered Rocket Car – Techory.com - Regular Ramblings About Technology

  • Concerned

    On a very child-like level, I find this remotely amusing, but as an adult this troubles me twofold:

    1) that some people have way too much time on their hands to do stuff like this and
    2) the irrevocable damage eating Mentos and drinking Coke products must be doing to people’s bodies…

    A for level of creativity, silliness, and commitment to useless engineering feats
    F for value added back to society, both in possible health risks in consuming these products, as well as for the negative economic impact from loss of employee productivity as a a result of watching mindless videos like this one

    Anyone Agree? Disagree?

  • Andy

    Oh please value to society? Like showing our children a little about physics and engineering, oh and having a little fun on the way. It is exactly these type of mindless stunts that get creative people going, hats off to these guys and to shows like Mythbusters that demonstrate that a technical education can be fun and yes, most of the time we engineers do give a lot back to society.

  • dd

    hey i think the mythbusters should team up with these guys and do something super insane- like bigger than the slip and slide- with these guys all together they might get coke and mentos into orbit…

  • Castal

    Actually dd, the MythBusters did do a special segment based on the coke and mentos video–but the guys from Eepybird were not directly involved. I do think it would be interesting for them to actually have a team-up and do other experiments though! (As far as the actual date of the show, I don’t remember–but I just watched it and that is how I got information to see this site)

  • W.W.

    Friend sent me a link to maker fair where a found a reference to here. The concept of using the bottles for power sounds like fun, but if you really want some better efficiency, try using nozzles aimed at a pelton wheel (aka impulse turbine), then gear/chain drive to a bike wheel. You’ll need the wheel large enough to aim all the nozzles at it at the same time and a mechanism for releasing the mentos.

  • andrew

    they get paid to do this, its not that they have way too much time on their hands

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