Description: Teams will build and bring with them a device capable of protecting an egg when tossed horizontally (clearing a barrier) placed on the floor.
Materials: Teams must bring egg protection devices, safety glasses, and their own tape or other allowable material to seal the device after the egg is loaded. Event leaders will provide raw Grade A Large chicken eggs and targets.
Scoring: Teams will be placed in tiers according to whether the egg breaks and then ranked by the mass of the device. Lowest score wins.
Tier 1: Egg Survives 2 tosses.
Tier 2: Egg survives first toss only.
Tier 3: Egg breaks on first toss.
- If you hold an egg between your palms short ways, when you squeeze it it will break. If you hold it long ways and squeeze, you probably can't break it. Eggs are stronger long ways, so try to orient it in your device so it will land top or bottom first. This is a great classroom demonstration, but demo it over a trashcan with safety glasses and a trashbag with a neckhole cut in it to be used as an apron just in case your egg has a weak spot.
- The USDA has defined a large chicken egg to be 60 g (+/- 3 g) averaged by the dozen.
- To practice your accuracy without the mess, use a plastic easter egg filled with enough paperclips, clay, or other mass to equal 60g.
- To test if a raw egg will survive impact without the mess, place the egg inside a sandwich baggie before loading it into the device.
- Part of the strategy in this event will be building something that can be easily opened between tosses to check if the egg has survived.
This video shows a coach explaining the event to her team. The kids asked some great questions!
Heres a video to show what this event will look like on competition day in 2017!
Eggs have 2 axes (plural of axis, not a tool for chopping down trees), the shorter weaker one, and the longer stronger one. In events with eggs you want to make sure the egg always receives the brunt of the impact on the stronger axis. Try this demo at home to see for yourself, just make sure you're not standing over good carpet!!
In events that require the protection of an egg, like Trajeggtory, Egg Drop, or Egg-O-Naut, you don't want to practice with a real egg, that gets messy. Rather, make a fake egg that is the same size and weight as a real one to see how your device performs without having to wash it out each time.