Rotary-wing Flight Dynamics

Teacher

Dr. Sangram Samal

Core Courses

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Course Name : Rotary-wing Flight Dynamics

Code(Credit) :CUTM1095(2-0-1)

Course Objectives

Student will study this course to get the knowledge about different types of helicopter, and working principles of the helicopter flight
At end of this course student able to design a quad copter and able to fly

Learning Outcomes

Learn the rotor reaction and how to nullify this reaction
Ability to identify the types & classifications of components and control systems
Understand the stability of helicopter
Understand the principle of VTOL/STOL
Understand of hovercraft

Course Syllabus

Module I: Rotor configuration (3 hrs)

Introduction to rotary wing aircraft and Torque reaction, Different configurations to nullify the Torque reaction – Jet rotors and compound helicopters

Module II: Methods of Control (3 hrs)

Problem in rotary wing with compare to fixed wing aircraft, Methods of Control, rotor blade pitch control, –Collective pitch and and Cyclic pitch – Lead – Lag and flapping of rotor blade

Module III: Hovering and Vertical Flight (6 hrs)

Hovering performance – Momentum Theory, Blade element theories – Figure of merit – Profile and induced power estimation – Constant Chord and ideal twist rotors, Ground effect.

Module IV: Forward Flight (5 hrs)

Forward flight , Induced, profile and parasite power requirements in forward flight – Performance curves with effects of altitude, Hub Loads, Sideward Flight, Rearward Flight, Turning Flight, Autorotation.

Module V: Helicopter Trim and Stability (4 hrs)

Equilibrium condition of helicopter, Trim analysis, Basics of helicopter stability.

Module VI: VTOL and STOL (5 hrs)

Various configurations – propeller, rotor, ducted fan and jet lift – Tilt wing and vectored thrust –Performance of VTOL and STOL aircraft in hover, transition and forward motion.

Module VII: Ground Effect Machines (4 hrs)

Hovering Flight, lift augmentation and peripheral jet machines – Drag of hovercraft on land and water –Applications of hovercraft.

Text Books:

Gupta, L., Helicopter Engineering, Himalayan Books, 1996
Gessow, A.and Myers, G. C., Aerodynamics of Helicopter, MacMillan & Co., 1987.

Reference Books:

Johnson, W., Helicopter Theory, Princeton University Press, 1980.
MacCromick, B. W., Aerodynamics of V/STOL Flight, Academic Press, 1987.

Source of reference; NPTL

https://nptel.ac.in/courses/101/104/101104017/,

Project- Design and Build a small quad copter and fly it. Use Dassult system for designing

Steps:

Comparative configuration study of different types of quad copter.
Comparative study of specification and performance details of quad copter
Preparation of Comparative data sheets
Comparative graphs preparation and selection of main parameters for the design purpose of the quad copter
Preliminary main parameters Power plant selection , and control
Build the quad copter
Detailed stability check at ground.
Flight testing
Documentation