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Author by: Gabriel Alexander Khoury Language: en Publisher by: Cambridge University Press Format Available: PDF, ePub, Mobi Total Read: 95 Total Download: 333 File Size: 41,8 Mb Description: This comprehensive guide to modern airship design and operation, written by world experts, is the only up-to-date book on airship technology intended as a technical guide to those interested in studying, designing, building, flying, and operating airship. In addition to basic airship principles, the book covers conventional and unconventional design in a panoramic and in-depth manner focusing on four themes: (1) basic principles such as aerostatics, aerodynamics, propulsion, materials and structures, stability and control, mooring and ground handling, and piloting and meteorology; (2) different airship types including conventional (manned and unmanned), hot air, solar powered, and hybrid; (3) airship applications including surveillance, tourism, heavy lift, and disaster and humanitarian relief; and (4) airship roles and economic considerations. This second edition introduces nine new chapters and includes significant revisions and updates to five of the original chapters.

Author by: Books LLC Language: en Publisher by: Books LLC, Wiki Series Format Available: PDF, ePub, Mobi Total Read: 97 Total Download: 818 File Size: 42,5 Mb Description: Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Chapters: Aluminium, Hydrogen, Helium, Propeller, Hot air balloon, Monocoque, Buoyancy, Truss, History of ballooning, Umberto Nobile, Polyester, Mooring mast, Thrust vectoring, RAF Cardington, Aramid, Buoyancy compensator, Airship hangar, Spy basket, Laminate, Geodesic airframe, Goldbeater's skin, Lifting gas, Ballonet, Polyvinyl fluoride, Thermic welding, Hybrid moored balloon. Excerpt: Helium ( -lee- m) is the chemical element with atomic number 2 and an atomic weight of 4.002602, which is represented by the symbol He.

It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. Next to hydrogen, it is the second most abundant element in the universe and accounts for 24% of the elemental mass of our galaxy. An unknown yellow spectral line signature in sunlight was first observed during a solar eclipse in 1868 by French astronomer Jules Janssen. Janssen is jointly credited with the discovery of the element with Norman Lockyer, who observed the same eclipse and was the first to propose that the line was due to a new element, which he named helium. In 1903, large reserves of helium were found in natural gas fields in parts of the United States, which is by far the largest supplier of the gas. Helium is used in cryogenics (its largest single use, absorbing about a quarter of production), particularly in the cooling of superconducting magnets, with the main commercial application being in MRI scanners.