Course detail
Flight Mechanics II
FSI-OML-A Acad. year: 2020/2021 Winter semester
Classical theory of the stability and control of aircraft. Development of general equations of motion for an atmospheric aircraft. Classical small perturbation equations of motion. Aircraft state equations. Aerodynamic stability derivatives -meaning and estimation. Dynamic stability modes and their influence on aircraft handling. Longitudinal and lateral-directional stability of aircraft. Controllability and manoeuvrability. Trim. Requirements on the flying and handling qualities. Aircraft as a dynamic system.
Language of instruction
English
Number of ECTS credits
5
Supervisor
Department
Learning outcomes of the course unit
Familiarizing with basic criteria for flying characteristics of an atmospheric aircraft. Qualitative and quantitative considering of flying handling characteristics, stability and controllability regarding the design and optimal use of an aircraft.
Prerequisites
The basics of mathematics – differential and integral calculus, common differential equations. The basics of common mechanics ; force effect on a body, kinematics, dynamics.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.
Assesment methods and criteria linked to learning outcomes
The exam is written and oral, and the core of proving knowledge is based on a written exam, which consists of a part without aids (general theoretical knowledge) and a part of a given problem using aids (notes from lectures and exercises). Classification according to FSI Study and Examination Regulations.
Aims
The goal is to explain the basic flight mechanics of atmospheric aircraft. Familiarizing students with the methods of calculation of the stability and aircraft control. Students will also learn to judge the influence of aircraft design parameters on its flying characteristics.
Specification of controlled education, way of implementation and compensation for absences
Lectures are optional. Exercises are compulsory, and the attendance (80% at the minimum) is controlled and recorded. The absence (in justifiable cases) can be compensated by personal consultation with the lecturer and elaboration of individually assigned topics and exercises. Individual tasks must be finished and handed in the credit week at the latest.
The study programmes with the given course
Programme M2I-A: Mechanical Engineering, Master's
branch M-STL: Aircraft Design, compulsory
Type of course unit
Lecture
39 hours, optionally
Teacher / Lecturer
Syllabus
1. Introduction. Basic definitions.
2. Longitudinal static stability of airplane.
3. Lateral-directional static stability of airplane.
4. Longitudinal static control and trim of airplane.
5. Longitudinal manoeuverability of airplane.
6. Lateral-directional static control of airplane.
7. Flight with asymmetric thrust. Minimum control airspeed.
8. Lateral-directional manoeuverability of airplane.
9. General equations of airplane total motion.
10.Linearized perturbation equations of motion for solution of dynamic stability.
11.Longitudinal dynamic stability with fixed-control. Short-period and phugoidal motion.
12.Lateral-directional dynamic stability. Spiral and Dutch roll motion.
13.Special flight regimes. Stall and spin characteristic.
Exercise
13 hours, compulsory
Teacher / Lecturer
Syllabus
1. Control-fixed neutral point of airplane and static margin calculation.
2. Control-free neutral point of airplane and static margin calculation.
3. Control-fixed manoeuvre point of airplane and manoeuvre margin calculation.
4. Control-free manoeuvre point of airplane and manoeuvre margin calculation.
5. Control force gradient calculation.
6. Control force gradient calculation.
7. Control force per g calculation.
8. Control force per g calculation.
9. Minimum control airspeed calculation.
10.Short-periodic longitudinal motion calculation.
11.Phugoidal longitudinal motion calculation
12.Lateral-directional motion calculation – spiral motion.
13.Lateral-directional motion calculation – Dutch roll.