Home Diy • Download Backyard Ballistics: Build Potato Cannons, Paper Match by William Gurstelle PDF

Download Backyard Ballistics: Build Potato Cannons, Paper Match by William Gurstelle PDF

By William Gurstelle

Traditional fogeys can build thirteen impressive ballistic units of their storage or basement workshops utilizing reasonably cheap family or ironmongery shop fabrics and this step by step advisor. transparent directions, diagrams, and pictures express the best way to 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 powerful emphasis on safeguard, the publication additionally provides pointers on troubleshooting, explains the physics in the back of the initiatives, and profiles scientists and outstanding experimenters equivalent to Alfred Nobel, Robert Goddard, and Isaac Newton. This booklet might be quintessential for the legions of yard toy-rocket launchers and fireworks fans who want on a daily basis was once the fourth of July.

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Read Online or Download Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices PDF

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

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When the tube is attached, screw the cap back onto the plastic bottle. 41 BACKYARD BALLISTICS Making the Missile 1. File or whittle the 1-inch wooden dowel into a rounded nose cone. Weight is very important in terms of the performance of your rocket, so make the dowel as light as possible by hollowing out the interior of the nose cone with a drill or knife. Drill a hole from the bottom of the cone, up toward the nose, but do not drill all the way through the nose. 2. Cut a sheet of paper approximately 3 inches wide by 6 inches long.

Carefully drill a 1/16-inch hole through the middle of the stopper. 2. Next, widen the hole you just made by drilling a 5/32-inch hole about 1/2 inch down from the top (1-inch diameter) surface of the stopper. 3. 9. 4. Insert the inflation needle into the bottom surface of the stopper so that it projects into the copper tube. 8 Water rocket stopper hole detail BACK PORCH R O C K E T R Y Making the Rocket 1. Cut out a half sphere of foam rubber (or an old sponge) and glue it to the bottom of the soda bottle (which is really the top of the rocket).

When the match head is heated to ignition temperature, it forms a hot, rapidly expanding gas within the aluminumwrapped match head (the rocket's combustion chamber). The rocket has two ports, or openings, that vent the gas in a controlled direction. The exiting gas propels the rocket forward. Newton's third law explains why: Any action has an equal and opposite reaction. In this case, if the gas is exerting a force in the backward direction (because that's the way our jet exhaust ports point), the equal and opposite reaction will cause the rocket to move forward.

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