LEADER 00876nam a2200253 i 4500 001 991001314909707536 005 20020507114310.0 008 970308s1976 il ||| | eng 035 $ab1020345x-39ule_inst 035 $aLE00645707$9ExL 040 $aDip.to Fisica$bita 084 $a53.0.634 084 $a53.9.1 100 1 $aCherepnin, N.$0464397 245 10$aTreatment of materials for use in high vacuum equipment /$cN. Cherepnin 260 $aHolon :$bOrdentlich,$c1976 300 $av. :$bill. 650 4$aVacuum 907 $a.b1020345x$b21-09-06$c27-06-02 912 $a991001314909707536 945 $aLE006 53.0.634 CHE$g1$i2006000010184$lle006$o-$pE0.00$q-$rl$s- $t0$u0$v0$w0$x0$y.i10251376$z27-06-02 996 $aTreatment of materials for use in high vacuum equipment$9192602 997 $aUNISALENTO 998 $ale006$b01-01-97$cm$da $e-$feng$gxx $h0$i1 LEADER 06463nam 2200709 a 450 001 9910139628403321 005 20230802061710.0 010 $a1-5231-2341-9 010 $a1-283-17795-1 010 $a9786613177957 010 $a1-119-97272-8 010 $a1-119-99411-X 010 $a1-119-99410-1 035 $a(CKB)2550000000041716 035 $a(EBL)697587 035 $a(SSID)ssj0000506348 035 $a(PQKBManifestationID)11353118 035 $a(PQKBTitleCode)TC0000506348 035 $a(PQKBWorkID)10514707 035 $a(PQKB)10208535 035 $a(MiAaPQ)EBC697587 035 $a(PPN)171601785 035 $a(OCoLC)739118496 035 $a(CaSebORM)9781119972723 035 $a(EXLCZ)992550000000041716 100 $a20110425d2011 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aBasic helicopter aerodynamics$b[electronic resource] /$fJohn Seddon, Simon Newman 205 $a3rd ed. 210 1$aChichester, England ;$aHoboken, N.J. :$cWiley,$d2011. 215 $a1 online resource (287 p.) 225 1 $aAerospace series 225 1 $aTHEi Wiley ebooks 300 $aDescription based upon print version of record. 311 $a0-470-66501-7 320 $aIncludes bibliographical references and index. 327 $aBasic Helicopter Aerodynamics; Contents; About the Authors; Series Preface; Preface to First Edition; Preface to Second Edition; Preface to Third Edition; Notation; Units; Abbreviations; 1 Introduction; 1.1 Looking Back; 1.1.1 Early Years; 1.1.2 First World War Era; 1.1.3 Inter-war Years; 1.1.4 Second World War Era; 1.1.5 Post-war Years; 1.1.6 The Helicopter from an Engineering Viewpoint; 1.2 Book Presentation; Reference; 2 Rotor in Vertical Flight: Momentum Theory and Wake Analysis; 2.1 Momentum Theory for Hover; 2.2 Non-dimensionalization; 2.3 Figure of Merit; 2.4 Axial Flight 327 $a2.5 Momentum Theory for Vertical Climb2.6 Modelling the Streamtube; 2.7 Descent; 2.8 Wind Tunnel Test Results; 2.9 Complete Induced-Velocity Curve; 2.9.1 Basic Envelope; 2.9.2 Autorotation; 2.9.3 Ideal Autorotation; 2.10 Summary Remarks on Momentum Theory; 2.11 Complexity of Real Wake; 2.12 Wake Analysis Methods; 2.13 Ground Effect; 2.14 Brownout; References; 3 Rotor in Vertical Flight: Blade Element Theory; 3.1 Basic Method; 3.2 Thrust Approximations; 3.3 Non-uniform Inflow; 3.3.1 Constant Downwash; 3.4 Ideal Twist; 3.5 Blade Mean Lift Coefficient; 3.6 Power Approximations; 3.7 Tip Loss 327 $a3.8 Example of Hover CharacteristicsReference; 4 Rotor Mechanisms for Forward Flight; 4.1 The Edgewise Rotor; 4.2 Flapping Motion; 4.3 Rotor Control; 4.4 Equivalence of Flapping and Feathering; 4.4.1 Blade Sailing; 4.4.2 Lagging Motion; 4.4.3 Coriolis Acceleration; 4.4.4 Lag Frequency; 4.4.5 Blade Flexibility; 4.4.6 Ground Resonance; References; 5 Rotor Aerodynamics in Forward Flight; 5.1 Momentum Theory; 5.2 Descending Forward Flight; 5.3 Wake Analysis; 5.3.1 Geometry of the Rotor Flow; 5.4 Blade Element Theory; 5.4.1 Factors Involved; 5.4.2 Thrust; 5.4.3 In-Plane H-force 327 $a5.4.4 Torque and Power5.4.5 Flapping Coefficients; 5.4.6 Typical Numerical Values; References; 6 Aerodynamic Design; 6.1 Introductory; 6.2 Blade Section Design; 6.3 Blade Tip Shapes; 6.3.1 Rectangular; 6.3.2 Swept; 6.3.3 Advanced Planforms; 6.4 Tail Rotors; 6.4.1 Propeller Moment; 6.4.2 Precession - Yaw Agility; 6.4.3 Calculation of Downwash; 6.4.4 Yaw Acceleration; 6.4.5 Example - Sea King; 6.5 Parasite Drag; 6.6 Rear Fuselage Upsweep; 6.7 Higher Harmonic Control; 6.8 Aerodynamic Design Process; References; 7 Performance; 7.1 Introduction; 7.2 Hover and Vertical Flight 327 $a7.3 Forward Level Flight7.4 Climb in Forward Flight; 7.4.1 Optimum Speeds; 7.5 Maximum Level Speed; 7.6 Rotor Limits Envelope; 7.7 Accurate Performance Prediction; 7.8 A World Speed Record; 7.9 Speculation on the Really Low-Drag Helicopter; 7.10 An Exercise in High-Altitude Operation; 7.11 Shipborne Operation; References; 8 Trim, Stability and Control; 8.1 Trim; 8.2 Treatment of Stability and Control; 8.3 Static Stability; 8.3.1 Incidence5 Disturbance; 8.3.2 Forward Speed Disturbance; 8.3.3 Angular Velocity (Pitch or Roll Rate) Disturbance; 8.3.4 Sideslip Disturbance; 8.3.5 Yawing Disturbance 327 $a8.3.6 General Conclusion 330 $a"Basic Helicopter Aerodynamics, now in its third edition, is widely appreciated as an easily accessible, rounded introduction to the first principles of the aerodynamics of helicopter flight. Concentrating on the well-known Sikorsky configuration of single main rotor with tail rotor, the authors avoid the lengthy mathematical treatment of some textbooks, thereby making the material accessible to undergraduates as well as engineers looking for an introduction to the subject.Early chapters deal with the aerodynamics of the rotor in hover, vertical flight, forward flight and climb. Analysis of these motions is developed to the stage of obtaining the principal results for thrust, power and associated quantities. Later chapters turn to the characteristics of the overall helicopter, its performance, stability and control, and the important field of aerodynamic research is discussed, with some reference also to aerodynamic design practice.This third edition has been brought up to date with a complete new set of illustrations & imagery, as well as an accompanying website that contains all the calculation files used in the book, problems, solutions and powerpoint slides. The authors address the unique considerations applicable to rotor UAVs/ MAVs, and coverage of blade dynamics is expanded to include lagging and ground resonance, and new material is included on blade tip design, flow characteristics surrounding the rotor in forward flight, tail rotors, and brown-out, blade sailing and shipborne operations"-- Provided by publisher. 410 0$aAerospace series (Chichester, England). 410 0$aTHEi Wiley ebooks. 606 $aHelicopters$xAerodynamics 615 0$aHelicopters$xAerodynamics. 676 $a629.133/352 676 $a629.133352 700 $aSeddon$b John M$0967983 701 $aNewman$b Simon$f1947-$0967984 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910139628403321 996 $aBasic helicopter aerodynamics$92198432 997 $aUNINA