Senkrechtstarttechnik: Flugmechanik, Aerodynamik, Antriebssysteme
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Senkrechtstart und Senkrechtlandung, die im englischen Sprachgebrauch mit VTOL ( ertical ake-2ff and anding) bezeichnet werden, erfordern Hubkrafte mindestens von der GraBe des Fluggewichts, urn senkrecht oder sehr steil vom Boden abheben zu kannen und urn bei der Landung das Flug- zeug mit ausreichend kleiner Sinkgeschwindigk2it in steiler Bahn si- cher an den Boden heranzuflihren. Eine liberzeugende Lasung dieser Aufga- be stellt der Hubschrauber dar, dessen Rotor infolge seiner sehr groBen Kreisflache und entsprechend geringer Kreisflachenbelastung den erfor- derlichen Hubschub mit relativ kleiner Triebwerksleistung erzeugen kann. Bedingt durch Rotorprobleme bei hohen Geschwindigkeiten und unglinstigen aerodynamischen Widerstand im Vorwartsfluq, flir den der Vortriebsschub durch Neigen der mit dem Flugzeug fest verbundenen Rotorachse als Kom- ponente des Hubschubs erzeugt wird, ist der Hubschrauber nicht in der Lage, hohe Reisefluggeschwindigkeiten und groBe Reichweiten zu erzie- len, und damit in der Wirtschaftlichkeit des Reiseflugs den konventio- nell startenden Flugzeugen stark unterlegen. Urn die Fahigkeit zum Senkrechtstarten und -landen mit den Reisefluglei- stungen konventioneller Flugzeuge verbinden zu kannen, benatigt man Senkrechtstarter besonderer Art, die durch ihre Wandlungsfahigkeit bei- den Forderungen gerecht werden. Oas vorliegende Buch befaBt sich mit den Entwurfsproblemen ausschlieBlich dieser Art von Senkrechtstartern, flir die im Englischen auch die Bezeichnung "Powered Lift Aircraft" ver- wendet wird.
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