Washington: National Aeronautics and Space Administration, 1972. - 295 p.
Translation of "Aerodinamika vertoletov" Transport Press, Moscow, 1969.Table of contentsPrinciples of helicopter flight
Brief History of Helicopter Development
The Helicopter and Its Basic Components
Classification of HelicoptersBasic characteristics of the main rotor
General Characteristics
Geometric Characteristics
Basic Regimes of Operation
The Operating Regime Coefficient of the Main RotorOperation of the main rotor in the axial flow regime
Impulsive Theory of an Ideal Rotor
Blade Element Theory
Forces Resisting Rotation of the Main Rotor
Power and Torque Required to Rotate Main Rotor
Main Rotor RPM Control
Techniques for Counteracting Main Rotor Reactive Torque
Techniques for Transmitting Torque From Engine to Main Rotor
Main Rotor Power Available
Main Rotor Thrust in Vertical Climb and Vertical Descent
Losses of the Real Rotor
Characteristics of Operation of Coaxial System of Two Main RotorsMain rotor operation in forward flight
Characteristics of Main Rotor Operation in Forward Flight
Main Rotor Thrust as a Function of Flight Speed
Blade Thrust and Its Azimuthal Variation
Resultant Flow Velocity Over Blade Element in the Hub Rotation Plane
Variation of Circumferential and Resultant Velocities Along Main Rotor Radius
Drawbacks of Main Rotor With Rigid Blade Retention
Purpose of Main Rotor Hub Horizontal Hinges
Conditions for Blade Equilibrium Relative to the Horizontal Hinge
Main Rotor Cone of Revolution
Blade Flapping Motions
Main Rotor Coning Axis Tilt
Blade Flapping Motion Restriction and Flapping Compensator
Blade Element Angle of Attack Change Owing to Flapping Motions
Effect of Number of Blades on Main Rotor Aerodynamic Characteristics
Azimuthal Variation of Rotational Resistance Forces and Reactive Torque
Inertial Forces Acting on Main Rotor Blades
Oscillatory Blade Motions
Damping of Oscillatory Blade Motions
Possibility of Loss of Blade Flapping Motion StabilityHelicopter vertical flight operating regimes
Hovering Regime. General Characteristics.
Diagram of Forces Acting on Helicopter and Hovering Conditions
Thrust and Power Required for Hovering
Vertical Climb
Helicopter Vertical Descent With Operating Engine
Vortex Ring RegimeHelicopter horizontal flight
General Characteristics of Horizontal Flight
Thrust and Power Required for Horizontal Flight
Characteristic Helicopter Horizontal Flight Speeds
Effect of Helicopter Weight and Flight Altitude on Performance
Factors Limiting Maximal Horizontal Flight Speed and Ways to Increase This Speed
Horizontal Flight Endurance and RangeClimb along inclined trajectory
General Characteristics of the Climb Regime Along an Inclined Trajectory
Thrust and Power Required for Climb
Vertical Rate of Climb
Variation of Vertical Rate of Climb With AltitudeHelicopter descent along inclined trajectory
General Characteristics of the Descent Regime
Thrust and Power Required for Helicopter Descent
Helicopter Rate of Descent With Operating EngineHelicopter flight in main rotor autorotative regime
Vertical Descent
Blade Aerodynamic Forces
Main Rotor Autorotation Conditions and Regimes
Conditions for Autorotation of Different Blade Elements
Gliding
Vertical Rate of Descent In a Glide
Safety Height
Transition From Flight With Engine Operating to Flight in the Main Rotor Autorotation Regime
Gliding Characteristics of Dual- Rotor HelicoptersHelicopter takeoff and landing
Takeoff
LandingHelicopter balance, stability, and control
Helicopter Center of Gravity and Balance
General Analysis of Helicopter Equilibrium
Helicopter Equilibrium in the Hovering Regime
Helicopter Static Stability
Helicopter Dynamic Stability
Concept of Helicopter Control
Change of Main Rotor Collective and Cyclic Pitch
Purpose and Principle of the Main Rotor Tilt Control System
Single-Rotor Helicopter Control Principles
Dual-Rotor Helicopter Control Principles
Concept of Helicopter ControllabilityHelicopter vibrations
General Analysis of Vibrations
Helicopter Forced Vibrations
Self-Excited Vibrations
Bending and Bending-Torsion Vibrations of Rigidly Restrained Blade
