LUNAR’clips
2001Livermore Unit of the National Association of Rocketry
Volume 8, Number 3
May / June 2001
Piñata Rocket Story
Tony Cooper LUNAR #
OK, I do admit one mistake. Last Easter I packed the Piñata Rocket with M&M filled plastic eggs. Even I know eggs are far too aerodynamic to drop on 3-year-old heads from 700'. Especially at 2 oz. each. Does anyone know the terminal velocity of a plastic Easter egg? Back to the story. This was before I had dual deployment. Actually this was the event that caused me to go to dual deployment. So what I did, was to put 6 inch little garbage bag parachutes on each little egg. Thought it would be rather amusing to see all the little hatchlings being set free on the winds with 50 little kids running and screaming after them. Fortunately this worked out. I announced the eggs had little parachutes and so they would have to watch for them.
Now for the turn of events. As soon as the H-180burned out, I had a drag separation. Seems all those little Easter eggs didn't like a 1G deceleration and they slammed against the nose cone knocking it off the rocket in a spectacularly explosive fashion. Even with the surprising deployment, the sky was filled with little parachutes floating down wind. All the kids started screaming and running after those lovely little parachutes.
Does anyone happen to know how long it takes for a plastic Easter egg to fall from an early deployment of about 200'? If you answered just long enough for 50 little kids to run out of the way, you are right. Seems that 2 oz Easter eggs with plastic parachutes being deployed into a 125mph air stream is no match for the adhesive ability of 3M Scotch Tape. For as soon as the last little tyke (with mother leading the way) cleared the recovery area where the eggs were planned to land, the Easter hand grenades started going off. It was rather spectacular. I could not see the eggs coming down so it looked as if little
M&M artesian wells were sprouting up all over the lawn. This year I don't know yet. We got rained out of our April launch. So the Piñata rocket sits in the garage filled with little plastic Easter eggs containing M&Ms attached to garbage bag parachutes. It's deployment charges sit waiting to properly spew forth little eggs in a 10mph air stream. Anyone have a problem with Easter eggs in May?