By Mike Rigsby
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Extra info for Amazing Rubber Band Cars: Easy-to-Build Wind-Up Racers, Models, and Toys
Materials and Tools 1 ⁄ 8 -inch-thick corrugated cardboard Scissors Round pencil White glue 4 C-cell batteries 2 rubber bands 51 01 (001-056) chapters 01-07 52 9/7/07 1:41 PM Page 52 Amazing Rubber Band Cars Copy the templates from pages 55 and 56 onto cardboard. You will need two Large Wheels (7A), two Small Wheels (7B), one Bottom (7C), one Front (7D), one Back (7E), and two Side Rails (7F). Now take one small wheel and attach it, using glue, to a pencil as shown. Add glue to the inside surface of the small wheel, then glue a large wheel to the small wheel.
As the pulley turns, be sure that the rubber band is turning—sometimes you have to use your ﬁngers to keep the rubber band from slipping on the ﬁrst rotation. When fully wound, at the point where the ﬁshing line is wrapped around the rear axle, this car will travel at least three times as far as the Basic Rubber Band Car. 01 (001-056) chapters 01-07 28 9/7/07 1:39 PM Page 28 Amazing Rubber Band Cars Decorating the Car Materials and Tools Light and dark blue acrylic paint Ocean-themed stickers Wiggle eyes Paintbrushes Here is just one idea for decorating your Distance Car—a ﬁsh in the ocean theme.
01 (001-056) chapters 01-07 9/7/07 1:38 PM Page 17 3 Bearings and Friction To make a car roll more easily, you must reduce the friction between the bearings and the axles. Bearings are the part of a machine in which an axle turns. The bearings on your car have been nothing more than a hole in a piece of cardboard . . until now. You can reduce friction with a simple aluminum foil bearing. Materials and Tools Scissors Ruler Aluminum foil 2 round pencils 17 01 (001-056) chapters 01-07 18 9/7/07 1:38 PM Page 18 Amazing Rubber Band Cars Start with the cardboard car frame from chapter 1.