Changes to Step #12

Edit by Ken Cory

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Step #12 Lines

[* black] The central cross easily pulls right out of the foam shell.
[* black] The two sets of wires in the central cross are responsible for controlling and providing power to the four motors.
[* black] The tubes of the cross are made of carbon fiber to save weight and provide plenty of structural rigidity.
[* black] The other plastic pieces are made of polyamide 6,6 (PA66), more commonly known as nylon. In practice, these nylon pieces will break before the carbon fiber tubes.
[* black] The other plastic pieces are made of polyamide 6,6 (PA66), more commonly known as nylon. In practice, these nylon pieces will break before the carbon fiber tubes.
[* icon_note] Yes, there are different variations of nylon, but it's not necessary to explain the differences between condensation and open-ring polymerization right now. Let's just get back to tearing down the AR.Drone.