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Chapter 3. BallistaMail - Pg. 63

MAKE: PROJECTS Eccentric Cubicle 3 BallistaMail: Projectile-to-Peer (P2P) Intercubicle Messaging Remember those wind-up balsa airplanes you flew as a kid? Wind about a hundred turns of the propeller onto the nearly-impossible- to-replace-when-it-breaks rubber band, chuck it into the air, and watch it soar majestically onto the roof of your house? Snickering as your dad almost falls off the ladder rescuing it? That's torsion energy at work, kids, and it's woefully under-