Rotary-wing aerodynamics / / W.Z. Stepniewski, C.N. Keys

• Autore: Stepniewski W. Z (Wieslaw Zenon), <1909->
• Pubblicazione: New York : , : Dover Publications, Inc., , 1984
• Edizione: 1st ed.
• Descrizione fisica: 1 online resource (1212 pages)
• Disciplina: 629.132/3
• Soggetto topico: Helicopters - Aerodynamics; Mechanical Engineering; Engineering & Applied Sciences; Aeronautics Engineering & Astronautics; Helicòpters - Aerodinàmica
• Persona (resp. second.): KeysC. N.
• Note generali: "Two volumes bound as one" -- Cover page; This Dover edition, first published in 1984, is an unabridged, slightly corrected republication in one volume of the work originally published in two volumes by the Science and Technical Information Office of the National Aeronautics and Space Administration for the U.S. Army Air Mobility Research & Development Laboratory of the Aviation Systems Command. Volume I, “Basic Theories of Rotor Aerodynamics (With Application to Helicopters),” by W. Z. Stepniewski, was originally published in 1979. Volume II, “Performance Prediction of Helicopters,” by C. N. Keys, originally published in 1979, is being reprinted here from the 1981 edition revised and edited by W. Z. Stepniewski
• Nota di contenuto: Contents: 1. Basic theories of rotor aerodynamics : (with application to helicopters) / W.Z. Stepniewski – 2. Performance prediction of helicopters / C.N. Keys ; edited by W.Z. Stepniewski ; Cover; Title Page; Copyright Page; Foreword; Volume 1; Preface; Notes on Metric System; Chapter I: Introduction; 1. Definition of Rotary-Wing Aircraft; 1.1 General; 1.2 Disc Loading; 2. Energy Consumption of Rotary-Wing Aircraft; 2.1 Hover; 2.2 Cruise; 3. Fundamental Dynamic Problems of the Rotor; 3.1 Asymmetry of Flow; 3.2 Asymmetry of Blade Loads; 3.3 Flapping Hinge; 4. Blade Flapping Motion; 4.1 Static Stability; 4.2 Dynamic Stability; 4.3 Effect of Flapping Hinge Offset; 5. Rotor Control; 5.1 Rotor Thrust Inclination through Cyclic Control in Hover; 5.2 Blade Flapping in Forward Flight ; 5.3 Control of the Thrust Vector Inclination6. Blade Lagging Motion; 7. Configurations; 7.1 Rotor Types; 7.2 Types of Helicopter Control; 7.3 Conventional Helicopter; 7.4 Tilt Rotor; References for Chapter I; Chapter II: Momentum Theory; 1. Introduction; 2. Simplest Model of Thrust Generation; 3. Actuator Disc; 3.1 Induced Velocity and Thrust in Axial Translation; 3.2 Contraction and Expansion of the Slipstream; 3.3 Ideal Power in Climb and Hovering; 3.4 Vertical Climb Rates; 3.5 Vertical Descent Rates; 3.6 Induced Velocity and Thrust in Nonaxial Translation ; 3.7 Power Required in Nonaxial Translation3.8 Thrust Tilt in Forward Flight; 3.9 Induced Power in Horizontal Flight; 3.10 Rate of Climb in Forward Flight; 3.11 Partial and Zero-Power Descent in Forward Flight .; 4. Flight Envelope of an Ideal Helicopter; 5. Effects of Downwash Characteristics on Induced Power; 5.1 Uniform Downwash - No Tip Losses; 5.2 Nonuniform Downwash and Tip Losses - The kind Factor; 5.3 Examples of kfncj Values and Types of Loading in Hover; 5.4 kind Values and Types of Span-Loading in Horizontal Flight; 6. Tandem Rotor Interference in Horizontal Flight; 6.1 The Model ; 6.2 Axial Flow Velocities and Induced Power6.3 Thzkmd Factor; 7. Induced Velocity Distributions Along Disc Chords; 8. Concluding Remarks re Momentum Theory; References for Chapter II; Chapter III: Blade Element Theory; 1. Introduction; 2. Axial Translation and Hovering; 2.1 Basic Considerations of Thrust and Torque Predictions; 2.2 Combined Blade-Element and Momentum Theory; 2.3 Nondimensional Coefficients; 2.4 Rotor Profile Power in Axial Translation; 2.5 Tip Losses; 2.6 Rotor Thrust and Power in Climb and Hovering; 2.7 Thrust and Induced Power of Intermeshing and Overlapping Rotors ; 2.8 Rotor Power, and Aerodynamic and Overall Efficiencies in Hover3. Forward Flight; 3.1 Velocities; 3.2 Thrust and Torque (General Considerations); 3.3 Downwash Distribution Along the Rotor Disc Chord; 3.4 Blade Profile Drag Contribution to Rotor Power and Drag (Simplified Approach); 3.5 Further Study of Blade Profile Drag Contribution to Rotor Power and Drag; 3.6 Contribution of Blade Element Induced Drag to Rotor Torque and Power; 3.7 Contribution of Blade Element Induced Drag to Rotor Drag; 3.8 Propulsive Thrust and Power Required in Horizontal Flight ; 3.9 Rotor and Helicopter Efficiency in Horizontal Flight
• Sommario/riassunto: 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 o
• Titolo autorizzato: Rotary-wing aerodynamics
• ISBN: 9780486318516; 1-5231-0956-4; 0-486-31851-6
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9911006703303321
• Lo trovi qui: Univ. Federico II
• Serie: Dover books on aeronautical engineering