39-245
Rapid Design through Virtual and Physical Prototyping

Carnegie Mellon University
Spring 2000

Save the Egg

Scoring Sheet

Structural Engineer___ Michelle P.________________________

Materials/Cost Engineer______ Zuley C.__________________________

Industrial Designer____________Shalyn D._________________________

1. Egg integrity 40 points for no breaks or cracks 30 points for just a crack 20 points for cracked, but still together 0 points for a smashed egg	___40____/40
2. Material Cost: unused µ*2	____26____/26 max
3. On target 25 points for a bull's-eye 20 points within 2 feet of the bull's-eye 15 points within 4 feet of the bull's-eye 10 points within 5 feet of the bull's-eye 5 points for hitting the ground	____20____/25
4. Egg holder aesthetics	____10____/10
Total	____96____/100

Your mission, should you choose to accept it (actually, you don't have much choice), is design an egg holder to protect an egg dropped from the classroom window to the pavement below. You will have 45 minutes to design and build your egg holder. Whatever you have ready 45 minutes from now will be dropped. The holder needs to protect the egg from cracking. You must work efficiently with your teammates to build your egg holder with the limited material available.

Instructions: Structural Engineer

In addition to the common goal of preventing the egg from cracking, you have the added responsibility of getting the egg-holder to hit the target. Your team will get 25 points for a bull's-eye, 20 points for getting within 1 foot of the bull's-eye, 15 points for getting within 2 feet of the bull's-eye, 10 points for getting within 3 feet of the bull's-eye and 5 points for hitting the ground.

Instructions: Materials/Cost Engineer

In addition to the common goal of preventing the egg from cracking, you have the added responsibility of minimizing the cost of material. You can purchase materials from the instructor using >mus (Monetary Units). You have a maximum budget of 36 mus. A price list for different materials will be available at the beginning of class. All purchases are final. No Exchanges or Returns.

Instructions: Industrial Designer

In addition to sharing the common goal of preventing the egg from cracking, you have the added responsibility of making your egg holder as aesthetically pleasing as possible. The more pleasing your egg holder is to the eye (before being dropped), the more points your team will receive. And remember, have fun and learn something!!! This page may self destruct in 5 seconds. Hey, you never know!!

Materials Cost Sheet

Item	µs	Item	µs
Cold Cup	15 µ	Rope	1 µ/inch
Hot Cup	15 µ	String	1 µ/inch
Clear Cup	10 µ	Masking tape	2 µ/in
Ziplock bag (small)	10 µ	Scotch tape	2 µ/in
Ziplock bag (large)	7 µ	Crepe paper	1 µ/in
Giant Eagle plastic bag	5 µ	Twist ties	2 µ/tie
Giant Eagle paper bag	3 µ	Wood shims	2 µ
Plastic soda bottle	10 µ	Cardboard	3 µ/in²
Shredded paper	15 µ/fistful	Safety pin	1 µ
Packing peanuts	1 µ/peanut	Bobby pin	1 µ
Bubble wrap	1 µ/in²	Paper plate	5 µ
Foam wrap	2 µ/in²	Styrofoam bowl	5 µ
Napkin	1 µ	Paper bowl	4 µ
Cloth	1 µ/in²	Clay	5 µ/lump

sfinger@ri.cmu.edu

39-245 Rapid Design through Virtual and Physical Prototyping

Carnegie Mellon University Spring 2000