15,641 research outputs found
Rotorcraft preliminary design
No full textThis chapter introduces conceptual and preliminary design concepts for a conventional helicopter. The subject of rotorcraft design is too vast to the presented in a single book chapter, and thus we limit the presentation to a few key design aspects, as discussed in our lecture series. We provide a top level discussion of the multi-disciplinary team-work required, including analysis of design requirements, costs, risks and compliance. The design consists of a main rotor system and the associated tail rotor, both of which require sizing, with determination of the number of blades, rotor solidity and angular speeds. We discuss concepts for rotor blade design, which is essential in reducing shaft power, improving overall rotor performance, limit vibrations and noise. Concepts are shown for fuselage sizing, including assessment of aerodynamic drag We discuss items such as the empennage (horizontal and vertical stabilisers) and the landing gear
Procedimento per la preparazione di derivati perfluorurati del cardanolo utili come intermedi organici, idrorepellenti, impregnanti, insetticidi, fitofarmaci e precursori di bisfenoli, resine fenoliche o resine fenoliche modificate.
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“About the synthesis of t-butyl-5-pentadecylphenol derivatives - A letter regarding “Novel antioxidants from Cashew Nut Shell Liquid applied to gasoline stabilization” by T. N. Castro Dantas et al., Fuel, 82 (2003) 1465-1469
No full textWorking twenty years on conjugated azoalkenes (and environs) to find new entries in organic synthesis
No full textProcedimento per la produzione di antiossidanti solforati da derivati dell'olio del guscio della noce di anacardio.
No full textDeclaration of Intention for Antonio Franchihtti
No full textDeclaration of Intention to become a citizen of the United States, as filled out and signed by Antonio Franchitti. Applicant lists himself as a 47 year old farmer residing in Hammonton, New Jersey, born in Campombosso, Italy on 18 April 1870, who sailed on the US bound vessel Britania. Declaration submitted and sworn April 21, 1917
Effect of metal ions in organic synthesis. XXXV. Simple and convenient aromatic alkylation of some alkenylphenol derivatives with tert-alkyl methyl ethers in the presence of tin(IV) chloride
No full text"Effect of metal ions in organic synthesis. Part XVI. Knoevenagel condensations of aldehydes and tosylhydrazones with 2,4-pentanedione by copper(II) chloride-catalyzed reaction
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