We decided to go for the world record for the tallest soda geyser. Currently, the record is held by Jamie Hyneman and Adam Savage from Mythbusters at 29 feet.
What To Do:
We used one of our soda geyser generators, but changed out the tube for a solid pipe (no leaking out the holes) and activated it by using a nut held in place by magnets.
We loaded the soda geyser generator with 10 Mentos (what we found worked best in our tests).
We attached the soda geyser generate to a 2L bottle of Diet Coke that we had left sitting out in the sun for several hours (remember, we filmed this back in August in over 100 degree heat, so it was pretty hot).
We did our countdown and released the geyser.
We then measured the maximum height of the geyser using a homemade altitude trackers like the ones here and calculated the height.
Well, unfortunately we fell just a little short – we only managed to get 27′ 2″. If you watch the video closely, you’ll see that the bottom of our generator leaked, so some of the pressure that generated the geyser was lost. We’ll need to improve the point where the geyser generator attaches to the bottle. We used 10 Mentos, which is what we determined worked best with ROOM TEMPERATURE soda. Our mistake! We should have tested to see how many work best with HOT soda. We’ll have to figure that out, as we found one Mentos still in the soda geyser generator at the end of our test. The wind had started to kick up outside the Children’s Museum of Houston by the time we went for the record, which had an impact on the height. We’ll have to do it again when there is less wind.
So, yes, we made some mistakes, but that is the essence of science! Run tests, make observations, draw conclusions, then begin again. Science is about a lot of tests and not giving up with failure always being an option. So keep your eyes open for our next attempt!