Rotary-wing Aerodynamics, Τόμος 1Dover Publications, 1984 - 601 σελίδες Recent literature related to rotary-wing aerodynamics has increased geometrically; yet, the field has long been without the benefit of a solid, practical basic text. To fill that void in technical data, NASA (National Aeronautics and Space Administration) commissioned the highly respected practicing engineers and authors W. Z. Stepniewski and C. N. Keys to write one. The result: Rotary-Wing Aerodynamics, a clear, concise introduction, highly recommended by U.S. Army experts, that provides students of helicopter and aeronautical engineering with an understanding of the aerodynamic phenomena of the rotor. In addition, it furnishes the tools for quantitative evaluation of both rotor performance and the helicopter as a whole. Now both volumes of the original have been reprinted together in this inexpensive Dover edition. In Volume I: "Basic Theories of Rotor Aerodynamics," the concept of rotary-wing aircraft in general is defined, followed by comparison of the energy effectiveness of helicopters with that of other static-thrust generators in hover, as well as with various air and ground vehicles in forward translation. Volume II: "Performance Prediction of Helicopters" offers practical application of the rotary-wing aerodynamic theories discussed in Volume I, and contains complete and detailed performance calculations for conventional single-rotor, winged, and tandem-rotor helicopters. Graduate students with some background in general aerodynamics, or those engaged in other fields of aeronautical or nonaeronautical engineering, will find this an essential and thoroughly practical reference text on basic rotor dynamics. While the material deals primarily with the conventional helicopter and its typical regimes of flight, Rotary-Wing Aerodynamics also provides a comprehensive insight into other fields of rotary-wing aircraft analysis as well. |
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Σελίδα 184
... rotor helicopter performance presented in this chapter are based on methods developed and refined during the CH - 46 ... tandem - rotor wind tunnel testing of the Boeing Vertol Universal Helicopter Model ( UHM ) shown in Fig 2.20 . To ...
... rotor helicopter performance presented in this chapter are based on methods developed and refined during the CH - 46 ... tandem - rotor wind tunnel testing of the Boeing Vertol Universal Helicopter Model ( UHM ) shown in Fig 2.20 . To ...
Σελίδα 187
Wieslaw Zenon Stepniewski, C. N. Keys. 2.4 Solidity The tandem - rotor solidity was sized to provide the same maneuver capability and structural envelope as the single - rotor aircraft ( Ch III , Sections 6.1 and 6.2 ) . The rotor stall ...
Wieslaw Zenon Stepniewski, C. N. Keys. 2.4 Solidity The tandem - rotor solidity was sized to provide the same maneuver capability and structural envelope as the single - rotor aircraft ( Ch III , Sections 6.1 and 6.2 ) . The rotor stall ...
Σελίδα 207
... TANDEM ROTOR SINGLE ROTOR 10 8 TANDEM ROTOR TOGW 19,450 ( HOGE ) TANDEM AND SINGLE ROTOR TOGW = 17,700 LB ( OEI 100 FT / MIN CLIMB AT INT POWER ) 6 2 SINGLE ROTOR TOGW 16,000 LB ( HOGE ) FULL FUEL 354 GAL OF JP - 4 AT 6.5 LB / GAL 1 0 ...
... TANDEM ROTOR SINGLE ROTOR 10 8 TANDEM ROTOR TOGW 19,450 ( HOGE ) TANDEM AND SINGLE ROTOR TOGW = 17,700 LB ( OEI 100 FT / MIN CLIMB AT INT POWER ) 6 2 SINGLE ROTOR TOGW 16,000 LB ( HOGE ) FULL FUEL 354 GAL OF JP - 4 AT 6.5 LB / GAL 1 0 ...
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actual aerodynamic aircraft airfoil angle application approach assumed average axis azimuth becomes blade blade element calculations characteristics chord circulation climb coefficient component computed Consequently considered corresponding defined determined developed direction disc discussed distance distribution downwash drag effects equal equation example expressed factor field Figure flapping flight flow forces forward flight fuel function fuselage geometry given gross weight helicopter horizontal hover hypothetical ideal increase indicated induced power induced velocity influence integration lift limits loading located losses maximum means method momentum nondimensional noted obtained performance pitch plane position potential power required predictions presented pressure problems radius ratio relationship represents respect resulting rotor shown in Fig similar speed stall station strength Substituting surface theory thrust tion trailing unit usually values variation various vortex vortices wake wing
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Flight Performance of Fixed and Rotary Wing Aircraft Antonio Filippone Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2006 |