Take a look at this one!
I have wanted to do this demo ever since my second year of teaching. I have read the instructions many times, found in Volume 1, Demo 1.41 of Shakhashiri’s Chemical Demonstrations. Every time I have read them, I would think, “I’ve got to try this, but it seems scary.” The set-up always gave me pause. I put it off until I “had more time”; just another excuse to delay plunging into this experiment.
|The Flinn Kit|
Here are a few pictures from the construction of our Mini Grain Elevator. We bent a funnel for the inside of the can, punched a hole in the paint can, scrounged around the science building for a rubber bulb, and put the whole thing together in a 1 gallon paint can.
This rig was awesome. It made a loud explosion, the lid flew off the can, flames shot out of the top of the can, and the candle flew out of the can. Attempts two and three were equally impressive. Making the rig was worth the effort! My colleague and I spent a couple of days setting off the Mini Grain Elevator for all of our classes and for any other visitors to the lab. It was really fun every time we ignited the can. The physics guys next door and the biology teacher down the hall came in to watch it go off several times too! My husband even made the trek from the next building to watch the famous Mini Grain Elevator explode. My reputation as a closet pyro was confirmed with this demo.
|Bending the stem of the funnel.|
|Second attempt. We broke the first funnel.|