Course Objective:

Students study general arrangement and structure of airplanes and helicopters of various civil and military purposes as well as their main assembly units: wings, fuselages, empennage, landing gear. They study purposes, principles of operation, structures of various systems, and airplane and helicopter equipment: control systems (principal and auxiliary); life-support and survival systems, fuel systems, etc. They study the structure and principles of main integral parts of power plants equipment with various types of engines.

They study main principles and rules of engineering and designing of both airplanes and helicopters in general (general designing) as well as their separate assembly units: wings, empennage, landing gear. They study engineering and designing of separate assembly units and components of aircraft structures: trailing-edge flaps, leading-edge flaps, control surfaces, spars, ribs, panels, ring units, engine mounting systems, etc.

The engineering and designing problems are studied with a wide application of integrated computer technologies CAD/CAM/CAE in UNIGRAPHICS, ADEM, COMPAS systems.

To give an introduction to the basics of rotary-wing aerodynamics, flight mechanics and aeroelasticity. The fundamentals of rotary-wing aeromechanics are radically different from those of fixed-wing, therefore a systematic coverage of helicopter technology from the most basic concepts is essential. The content of this course would enable students to initiate research in the area of helicopter technology as well as rotary wing unmanned aerial vehicles.

Course Content:

• Historical development; helicopter and VTOL configurations

• Momentum theory: hovering and axial vertical flight, forward flight

• Blade Element Theory (BET): Hover and forward flight, Blade Element Momentum Theory

• Performance estimation: power required for hover, climb, level flight, maximum level speed, speed for best endurance and range

• Rotor blade and hub idealization • Blade flap response

• Trim analysis: coupled trim • Uncoupled flap, lag and torsion dynamics of rotor blade

• Flap-lag, flap-pitch, lag-pitch coupling

• Introduction to coupled flap-lag, flap-torsion stability (time permits)

• Elements of helicopter stability (time permits)

 

References :

This being an online course there is no prescribed text. However, the following books are recommended:

1. Principles of Helicopter Aerodynamics – Gordon J. Leishman, 2nd Edition, Cambridge Aerospace Series, 2006.

2. Rotorcraft Aeromechanics – Wayne Johnson, Cambridge University Press, Apr 2013.

3. Fundamentals of Helicopter Dynamics, C. Venkatesan, CRC Press, 2014.

4. Helicopter Flight Dynamics – Gareth D. Padfield, 2nd Edition, Wiley-Blackwell, May 2008.

5. Basic Helicopter Aerodynamics, J. Seddon, 3rd Edition, Wiley, 2011.

6. Helicopter Performance, Stability and Control, R. W. Prouty, Krieger Publishing Company, Florida, 1986.

Special Emphasis

• Being able to understand the fundamentals of aerodynamics and dynamics of rotary wing.

• Ability to write simulation codes to predict the aerodynamic performance of blade under different conditions.

• Ability to develop coupled trim analysis which is backbone of any helicopter research.

• Basic ideas related to helicopter design would be highlighted at various stages.

Course Curriculum

Introduction
Basic Concepts
Design of Helicopters
Aviation & Cosmonautics

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