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

By William Gurstelle

Traditional parents can build thirteen extraordinary ballistic units of their storage or basement workshops utilizing reasonably cheap loved ones or ironmongery store fabrics and this step by step advisor. transparent directions, diagrams, and pictures convey easy methods to construct tasks 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 ebook additionally offers tips about troubleshooting, explains the physics at the back of the initiatives, and profiles scientists and striking experimenters similar to Alfred Nobel, Robert Goddard, and Isaac Newton. This booklet could be necessary for the legions of yard toy-rocket launchers and fireworks enthusiasts who want each day was once the fourth of July.

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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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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? While it may be possible to compare the rocket's apex with some nearby tree or building of known height, that's inconvenient at best and impossible at worst. " Triangulation is based on the branch of mathematics called trigonometry.

There are many other variables to explore. Experiment with different types and colors of match heads to see if some have more power than others. Find the angle of launch (trajectory) that maximizes the distance traversed. Real rocket performance analysis looks at a host of highly technical variables such as the shape and diameter of the exit nozzle (equivalent to the back edge of the jet tube), the rate of speed at which the gas leaves the exit orifice, the length of time of the "burn," and so on.

2. With your foot, stamp quickly and firmly on the plastic bottle. The rush of air will send the missile flying skyward to a surprising altitude. TIPS AND T R O U B L E S H O O T I N G 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.

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