A photo essay tracing the history and development of aircraft from hot-air balloons to jetliners. Includes information on the principles of flight and the inner workings of various flying machines.
According to early Sanskrit texts the ancients had several types of airships called vimanas. Like aircraft of today, vimanas were used to fly through the air from city to city; to conduct aerial surveys of uncharted lands; and as delivery vehicles for awesome weapons. David Hatcher Childress, popular Lost Cities author and star of the History Channel’s long-running show Ancient Aliens, takes us on an astounding investigation into tales of ancient flying machines. In his new book, packed with photos and diagrams, he consults ancient texts and modern stories and presents astonishing evidence that aircraft, similar to the ones we use today, were used thousands of years ago in India, Sumeria, China and other countries. This means that these ancient civilizations had advanced metal technology, electricity and the engineering knowledge of flight many thousands of years before our own era of flight technology. Childress discusses ancient UFO sightings, the fascinating lore of ancient flight and the technology allegedly used in the flying machines of the ancients.
Beskriver gennerelle principper for at flyve og fortæller om de første forsøg på at bygge en egentlig flyvemaskine før det lykkedes at gennemføre en bemandet, motordrevet flyvning
Calling all future Amelia Earharts and Chuck Yeagers—there's more than one way to get off the ground. Author and physics teacher Bobby Mercer will show readers 35 easy-to-build and fun-to-fly contraptions that can be used indoors or out. Better still, each of these rockets, gliders, boomerangs, launchers, and helicopters are constructed for little or no cost using recycled materials. The Flying Machine Book will show readers how to turn rubber bands, paper clips, straws, plastic bottles, and index cards into amazing, gravity-defying flyers. Learn how to turn a drinking straw, rubber band, and index card into a Straw Rocket, or convert a paper towel tube into a Grape Bazooka. Empty water bottles can be transformed into Plastic Zippers and Bottle Rockets, and ordinary paper can be cut and folded to make a Fingerrangs—a small boomerang—or a Maple Key Helicopter. Each project contains a material list and detailed step-by-step instructions with photos. Mercer also includes explanations of the science behind each flyer, including concepts such as lift, thrust, and drag, the Bernoulli effect, and more. Readers can use this information to modify and improve their flyers, or explain to their teachers why throwing a paper airplane is a mini science lesson. Bobby Mercer has been sharing the fun of free flight for over two decades as a high school physics teacher. He is the author of several books and lives with his family outside of Asheville, North Carolina.
This book clearly demonstrates the problems encountered by the personalities involved and their strengths in developing the helicopter for Coast Guard use. It shows how Erickson and his friend and mentor, Coast Guard captain William Kossler, undaunted by their lack of support, fought with single-minded intensity to establish the helicopter as a vital rescue tool in the service. Kossler died while the project was still in its infancy.