Table of Specifications

		Target		Tolerance		Measurement Device
Complete Assembly
Diameter		2.500"		+/- 0.005"		Digital Caliper
Total Width		1.175"		+/- 0.005"		Digital Caliper
String gap		0.075"		+/- 0.05"		Digital Caliper
Mass		50.00 g		+/- 5.00 g"		Scale
Max rotation speed		2400rpm*		+/- 500 rpm		Laser Tachometer
Moment of Inertia (Izz)		.0536 lb/in^2		-		-
Center of mass (x)		0.063"		+/- 0.005"		-
Center of mass (y)		0.000"		+/- 0.005"		-
Center of mass (z)		0.000"		+/- 0.005"		-
String clearance		0.100"		+/- .0005"		Digital Caliper
Part 1: Body
Inner diameter		2.300"		+ 0.000"/-0.005"		Digital Caliper
Maximum Thickness		0.163"		+/- .0005"		Digital Caliper
Part 2: Window
Outer diameter		2.300"		+ 0.005"/-0.000"		Digital Caliper
Inner diameter		2.000"		+ 0.000"/-0.005"		Digital Caliper
Maximum Thickness		0.050"		+/- .0005"		Digital Caliper
Part 3: Ring
Outer diameter		2.000"		+ 0.005"/-0.000"		Digital Caliper
Lettering Thickness		0.070"		+/- .0005"		Digital Caliper
Maximum Thickness		0.340"		+/- .0005"		Digital Caliper
* Dropped from a height of 39.4 "

With the start of a new semester, another yo-yo team has been born! We are a group of 5 students in MIT's Design and Manufacturing II Class, 2.008, that will design and manufacture yo-yo's over a few months. We are currently deciding between three project ideas: the use of spinners on our yo-yo's, the installation of LED's, or the creation of an asymmetrical, but fully functional, yo-yo. Our weekly meetings are scheduled to be on Mondays and Wednesday, so stay tuned for more updates!

Chris Mills
William Pritchett
Lucien Morales
Lesley Wang
Eric Tu

(Mass Production of Many Wonderful Toys)