Download e-book for kindle: Backyard Ballistics: Build Potato Cannons, Paper Match by William Gurstelle

By William Gurstelle

ISBN-10: 1556523750

ISBN-13: 9781556523755

Usual parents can build thirteen notable ballistic units of their storage or basement workshops utilizing reasonably cheap family or ironmongery store fabrics and this step by step consultant. transparent directions, diagrams, and images express how one can construct initiatives starting from the simple-a match-powered rocket-to the extra complex-a scale-model, table-top catapult-to the offbeat-a tennis ball cannon. With a robust emphasis on security, the booklet additionally provides tips about troubleshooting, explains the physics in the back of the tasks, and profiles scientists and notable experimenters similar to Alfred Nobel, Robert Goddard, and Isaac Newton. This publication can be integral for the legions of yard toy-rocket launchers and fireworks fans who want on a daily basis used to be the fourth of July.

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Additional info for Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices

Example text

The gas will shoot out of the aluminum exhaust ports. Zip! We have liftoff! 24 BACK PORCH R O C K E T R Y Rocket O (1) book of paper matches O Scissors O Aluminum foil O (2) pins or sewing needles Launcher O (1) 1-inch length of 1/4-inch diameter copper tube O "T" hinge, about 2 inches long x 11/2 inches wide O Adhesive or brazing O Wooden block, at least 3 inches x 3 inches and 3/4 inch thick (large enough to accommodate the hinge and thick enough to accommodate the wood screw) O (1) 1/2-inch-long wood screw O Paper clip (optional) O Cigarette lighter or wooden match O Safety glasses Making the Rocket 1.

First, make sure all connections are tight and there are no places for air to escape except to push the rocket up. 2. Weight is of critical importance. Make the nose cone as light as possible for best results. 3. The bigger the air reservoir, the better the performance will be. Look for the biggest HDPE (high-density polyethylene) bottle you can find that will attach to the flexible plastic tubing. 42 BACK PORCH ROCKETRY ALTITUDE WITH ATTITUDE Just how high will these rockets and missiles fly? You can't hold a tape measure up in the air and measure height directly, so is there another way to find out?

Some people claim their best match rockets have flown over 50 feet. The distance will depend on how well you make the rocket, the weight of the match rocket, the amount of chemical energy stored in the match head, and so on. These variables open up the doors for further experimentation. For instance, can you shave the matchstick to make it lighter and still get a fairly straight flight? The matchstick is Shave matchstick here 3-6 Matchstick 29 BACKYARD BALLISTICS important because it provides the rocket with a stable center of gravity.

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Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices by William Gurstelle

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