Here is a story from last April:
An 18-year-old high school student killed in the explosion of a "homemade model rocket" at a Thousand Oaks school that also left a 17-year-old boy injured was identified Tuesday, when the teens' campus community was mourning. Bernard Moon is the teen who died after an explosion occurred at Madrona Elementary School about 7:40 p.m. Monday. Emergency crews responded to the blast and found the two injured teens on the school's campus. The pair had created what the Ventura County Sheriff's Department described in a news release as a "homemade model rocket" that was attached to a skateboard. When the device didn't go off, Moon went to check on it, and the explosion occurred then, authorities said on scene.
Dan,
Dan, A truly sad story, indeed.
To lighten the atmosphere, let me share a story that could have ended in injury...twice...
An older retired Marine got his alternative teaching certification by taking a few college courses and using his job and Corp experience to qualify. He was hired at a Texas high school to teach Science with two classes of Physics. As a hobby he flew radio controlled R/C model planes and thought that the much more simple model rockets would be good to use in his Physics' classroom teaching.
At one of the monthly model airplane club's meeting, he told of an experience in his Physics classes just in the past week. Teaching Newton's Laws, he set up a bare model rocket engine to measure forward thrust against a set of scales. On a large piece of plywood, with some nails along both sides the rather large Estes engine for a longer burn, he held it down with crisscrossing heavy rubber-bands. The Science/Physics lab had the old multi-pane and large wood sash windows to which he'd opened to let out the minor rocket engine's exhaust.
Now, as I remember, the Estes Rocket motors have a propulsion stage, then a stage that has the excessive white trailing and visual tracking smoke. But, it has the last burn stage that has a powder charge that explodes forward through the hollow rocket body to eject the nosecone and return parachute. The smoke stage and ejection charge never entered his mind as to what was to come...
With several of the model club's members standing around him, he said,
" I teach Physics and we used an Estes Rocket motor for an experiment, yesterday. Man, I still don't know what happened. After I made sure everybody was wearing the lab's safety glasses and well away from the setup, I set off the rocket motor. I never new it would cause so much smoke! Smoke filled the classroom, but with an incoming breeze the smoke stayed in the classroom and even went out into the main hallway. Then, at the very last, it came out of the holder and smoking engine carcass violently bounced from wall to floor to ceiling all about the classroom."
There were lots of comments along with the groaning laughter.
Then, he continued. "You know, even though I put on more hold-down rubber-bands, I still don't understand it. In the afternoon Physics class, it did the same thing, AGAIN."