Review ArticleOpen accessIn the keywords“Defiant”, a Today Unique Helicopter in the WorldRelly Victoria Virgil PetrescuYou do not see helicopters like this every day. Sikorsky-Boeing SB1 Defiant in his first demonstration flight showed that it is much more than just a fancy design on paper as he could initially think, with a first relevant flight demonstration. The initial flight lasted less than 30 min, enough time for Defiant to prove he can climb and descend … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 15 Apr 2019 · 6,841 accessesView PDFCite
Review ArticleOpen accessIn the abstractAbout HelicoptersRelly Victoria Petrescu, Raffaella Aversa, Bilal Akash et al.A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. In contrast with fixed-wing aircraft, this allows the helicopter to take off and land vertically, to hover and to fly forwards, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft would … …Journal of Aircraft and Spacecraft Technology, Vol. 1, Issue 3 · 9 Sep 2017 · 15,671 accessesView PDFCite