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AirshipsINDEXPROLOGUE 2TYPES OF dirigible 2RIGID AIRSHIP 2NONRIGID AIRSHIP 3HISTORY OF RIGID AIRSPS 3HISTORY OF NONRIGID AIRSHIPS 4AIRSHIPS TODAY 5HINDENBURG 6HINDENBURG catastrophe 7PROLOGUEAn airship is a type of lighter-than-air aircraft with propulsion and maneuversystems, it is used to carry passengers and cargo. It obtains its buoyancyfrom the presence of a lighter-than-air waste such as hydrogen or helium. Thefirst airship was authentic by the French, called a ballon dirigible, it couldbe steered and could excessively be flown a havest the wind.TYPES OF AIRSHIP dickens basic types of airship have been developed the stiff airship, the trope ofwhich is fixed by its internal structure and the nonrigid blimp, which dependson the pressure created by a series of air diaphragms inside its gas space to discover the shape of its fabric hull. Inventors sought to combine the bestfeatures of these models in a semirigid type, just it met with only limitedsuccess. Today only the no nrigid airship is used.Rigid AirshipThe rigid airships structure resembled a batting cage that enclosed a series ofballoons called gas cells. These cells were tailored to fit the roundedspace and were secured in place by a netting that patrimonial the lifting forceof their gas to the structure. Each gas cell had dickens or more valves, whichoperated automatically to relieve pressure when the gas expanded with altitude,the valves could also be operated manually so that the pilot could release gaswhenever desired. as well on board was a light ballast system that used irrigate as ballast. On the groundthis ballast served to make the airship heavier than air. When type of it wasreleased, the airship ascended to a cruising altitude where the engines suppliedpropulsion, and further ballast could be released to gain more altitude. As fuelwas consumed, the airship became lighter and tended to climb. This wascountered in hydrogen-inflated airships by simply releasing gas into theatmosp here.The method was uneconomical, however, with helium-inflated airships, and theywere therefore equipped with ballast generators, apparatuses that condensedmoisture out of the engines exhaust gases to compensate for fuel that wasconsumed. But this ballast-generating equipment was expensive, complex, heavy,and fractious to maintain and was thus one of the most serious disadvantages ofairships filled with the safer but more expensive helium.Nonrigid AirshipIn contrast to the rigid airship, the nonrigid blimp has no internal structureto maintain the shape of its hull envelope, which is made of two or three pliesof cotton, nylon, or dacron impregnated with safe for gas tightness. Insidethe gas space of the hull are two or more air diaphragms called ballonets that