Rotor egg drop - Wikispaces
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ROTOR EGG DROP
Science Olympiad Summer Institute
Phoenix, AZ
July 16 – 20, 20112
DESCRIPTION:
Construct a helicopter type device to safely
transport a raw chicken egg from a given
height to the floor
EVENT PARAMETERS
Use wings/blades that rotate around a
central axis to slow decent
No energy producing mechanisms
No pre-made rotor assemblies
Cannot be:
Airplane
Balloon
Parachute
PARAMETERS (cont.)
Grade A large chicken egg
Sealed in plastic bag
Placed in cup
8 – 10 oz
Foam?
Attached to device by tape
Egg, bag, cup, and tape provided by event
supervisor
PARAMETERS (cont.)
Cup is 1st surface to touch the floor
Devices where cup does not touch floor first will
be ranked below other devices where cup does
touch the floor first
No other shock absorbing material allowed
Devices must fit w/in 51 cm x 51 cm x 51 cm
COMPETITION
Impounded before start of event
No modifications allowed other than to attach egg
Students may inspect egg
If cracked may request another egg
Once accepted if broken before drop students
may receive another egg
2 sec. penalty subtracted from final time
COMPETITION (cont.)
Only one drop
Height announced day of tournament
5 meter minimum
Time – release time until it hits floor
3 timers – MEDIAN of the 3 times
(the middle time is used)
COMPETITION (cont.)
After drop student removes egg from device
and gives to supervisor
All devices with eggs surviving will be ranked
ahead of devices with broken eggs
even if student breaks the egg after the
drop and before giving to supervisor
Broken egg defined by wet spot on paper
towel
SCORING
Highest time wins
Devices not meeting construction parameters
will be ranked below all devices that do
Devices with broken eggs will be ranked
below successful devices
Tiebreaker
Lightest helicopter (w/o egg, bag, cup)
No appeals after device leaves impound
Practice
To practice without wasting eggs, take a
plastic egg and weight with pennies to
approximate mass of egg
Plan on making lots of different rotor designs.
Rotors must rotate at least 360 degrees in its
descent or it is not a rotor it is a parachute
The higher the drop, the easier it is to get
rotor to rotate 360 degrees
Angled blades rotate better than flat blades
Web Sites
http://fc.niskyschools.org/~psherman/03978F9B-011EDE4C.25/HelicopterEggDropNotes.pdf
http://www.instructables.com/id/Amazing--Graceful-Egg-Drop-Contraption/