Amazing Rubber Band Cars: Easy-to-Build Wind-Up Racers, by Mike Rigsby

By Mike Rigsby

Combining enjoyable and interactive actions, this advisor may have teenagers captivated for hours developing really good racing vehicles with the fundamentals of in basic terms rubber bands, cardboard, and glue. those basic directions with templates enable budding engineers to achieve hands-on event as they study not just easy methods to construct a easy racer, yet easy methods to make variations corresponding to aluminum foil axle bearings, guidance mechanisms, hinges, cam shafts, and wheels produced from previous CDs. This helpful source has step by step directions for creating a uncomplicated rubber-band version, a railroad push-car, and a high-speed racer. different exact initiatives comprise Oscar the guffawing Clown, which has a jaw mechanism that opens and closes whilst it strikes, and notice the puppy, which has a relocating tail. little ones also can tips on how to construct a rubber band vehicle sufficiently big for a human. Exploring wheels, bearings, and friction, teenagers will research not just tips on how to make fast racers but in addition the technology that makes the method work.

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Each turn of the pulley turns the axle several times, making the wheels turn more revolutions than on the basic car. You may think this is magic—make a big enough pulley and the car will run forever—but there are limits. Bigger pulleys are harder for the rubber band to turn. If the pulley is too large, the rubber band won’t be able to turn it, and the car will not move. Materials and Tools 1 ⁄ 8 -inch-thick corrugated cardboard Scissors Pushpin White glue Hole punch 3 round pencils 1-foot length fishing line 2 rubber bands 23 01 (001-056) chapters 01-07 24 9/7/07 1:39 PM Page 24 Amazing Rubber Band Cars Copy the templates from pages 29, 30, and 31 onto cardboard.

Insert the pencil axle through the holes at the back of the frame, and glue a wheel to the other end of the axle. Place two wheels onto a pencil axle in the front part of the frame. 01 (001-056) chapters 01-07 9/7/07 1:40 PM Page 43 Railroad Push Car 43 Glue the two push rod pieces together, as shown, and glue the washer onto the remaining pencil, near the eraser. Starting on the side of the car opposite the special wheel, push the pencil (with the washer) through the hole in the upper part of the side rail, through the push rod, and through the hole on the opposite side rail.

You will use these holes to mount the pulley. Glue the three small inner pulleys pieces together, making sure the holes align. Then glue the two outer pulleys to the inner pulleys. Finally, punch a hole into one of the outer pulley wheels, as shown. 01 (001-056) chapters 01-07 9/7/07 1:39 PM Page 25 Distance Car Insert a pencil through one side rail hole. Add a spot of glue to the pencil, and slide it through the pulley wheels. Slide the end of the pencil through the other side rail hole. Your car should now look like this.

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