Aeroacoustics
Main rotor/tail rotor acoustics, noise interactions, operational impacts
K. Brentner
- Fundamentals of acoustics
- Key acoustics concepts
- Aspects of sound propagation
- Human response to sound
- Noise certification
- Overview of helicopter noise
- Acoustic theory
- Lighthill’s acoustic analogy
- Ffowcs Williams – Hawkings equation
- Farassat’s integral formulations
- Review of prediction state of the art
- Recent developments in helicopter/eVTOL noise prediction
- Maneuver noise
- Noise abatement procedures
- eVTOL, Urban Air Mobility, and UAS noise
Composite Structures
Helicopter composite structures, material properties
D. Pullman
- Introduction
- Analysis part I and part II
- Design for fabrication
- Fabrication methods
- Full-scale testing
- FAA certification
- Examples
Dynamics
Helicopter and tilt-rotor dynamics, coupled rotor/fuselage vibrations
B. Welsh
- Dynamics refresher (natural frequencies and forced response)
- Articulated rotor dynamics (flap, lag, torsion, etc.)
- Types of rotors
- Isolated rotor stability
- Coupled rotor airframe stability
- Aircraft vibration
- Vibration control approaches
- Design support and testing
- Recent research and development
Fundamentals of Vertical Lift
Axial flight aerodynamics and the rotor in edgewise flight
A. Brand
- The technology of vertical lift — essential physics
- Aerodynamics of vertical lift (momentum theory and the ideal rotor)
- Vortex theory applied to the rotor
- Vortex ring state
- The aerodynamics of forward flight
Propulsion
Propulsion and drive systems
B. Handschuh
- Overview of rotorcraft propulsion
- Major elements of propulsion system
- Impact of performance
- Power requirements
- Propulsion configurations
- The engine
- Cycle comparisons
- Gas turbine engine aerocomponents (compressor, turbine)
- Mechanical components
- Power transmission and engine control
Stability, Control, and Handling Qualities
Handling qualities, automatic control
R. M. McKillip
- Introduction, definitions, and scope
- Rotor control features
- Rotorcraft flight dynamics (equations of motion, linearization and stability derivatives, modes of response)
- Handling qualities (metrics for evaluation, specifications)
- Automatic flight control
- Higher complexity modes
- Rotor and wake dynamics
- Real-time simulation