Course detail
Flight Mechanics II
FSI-OML-A Acad. year: 2021/2022 Winter semester
The 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 maneuverability. 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. Project work devoted to handling qualities of an aircraft is the main exercise method.
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 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 attendance (80% at the minimum) is controlled and recorded. The credit condition is finished project work focused on handling qualities of an aircraft. Individual tasks must be finished and handed in the credit week at the latest.
The study programmes with the given course
Programme N-AST-A: Aerospace Technology, Master's, compulsory
Type of course unit
Lecture
39 hours, optionally
Teacher / Lecturer
Syllabus
1. Introduction. Basic definitions.
2. Longitudinal static stability of an aircraft.
3. Lateral-directional static stability of an aircraft.
4. Longitudinal static control and trim of airplane.
5. Longitudinal manoeuverability of an aircraft.
6. Lateral-directional static control of an aircraft.
7. Flight with asymmetric thrust. Minimum control airspeed.
8. Lateral-directional manoeuverability of an aircraft.
9. General equations of airplane total motion.
10.Linearized perturbation equations of motion for the solution of dynamic stability.
11.Longitudinal dynamic stability with fixed-control. Short-period and phugoid 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. Estimation of aerodynamic derivatives of the selected aircraft.
2. Estimation of aerodynamic derivatives of the selected aircraft.
3. Calculation of aerodynamic characteristics in XFLR5 or AVL software.
4. Calculation of aerodynamic characteristics in XFLR5 or AVL software.
5. Aircraft lift curve calculation.
6. Aircraft moment curve calculation.
7. Control force gradient calculation.
8. Control force gradient calculation.
9. Control force per g calculation.
10.Calculation of longitudinal dynamic stability – fast oscillations.
11.Calculation of longitudinal dynamic stability – phugoid oscillations.
12.Calculation of lateral dynamic stability – spiral motion.
13.Calculation of lateral dynamic stability – Dutch roll.