Course detail

Aircraft On-Board Systems I

FSI-OPZAcad. year: 2017/2018

Basic laws of pressure and electrical energy ransfer. Hydraulic circuits with pressure and flow regulation, working and emergency circuits. Requirements put on hydraulic systems and their elements. Pneumatic system, pneumatic elements characteristics, brake systems. Requirements imposed on direct control system, hydraulic and electro-mechanical servo control of aircraft with respect to their static, dynamic and stiffness properties. Modification of control forces. Fuel systems, pressure fuelling. Air condition systems, fire-fighting protection systems, ice protection systems, requirements and construction. Aircraft electrical systems. Electric power sources and the concept of electricity distribution systems in aircraft.

Learning outcomes of the course unit

Students will gain the basic knowledge and experience of function and construction of aircraft onboard systems I. The knowledge is necessary for aircraft designing, service and maintenance.


Basic knowledge of mathematics, differentiation, integral calculus, ordinary differential equations. Basic knowledge of fluid flow, equation of continuity. The laws of thermodynamics and fluid mechanics. Fundamentals of Electrical engineering.


Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

Předpisy EASA CS-23, CS-25 (CS)
Letecké předpisy FAR 23/CS 23, FAR 25/CS 25
I. Moir, A.Seabridge: Design and development of aircraft systems, AIAA, 2004.
I. Moir, A. Seabridge: Aircraft Systems, John Wiley & Sons, 2008. (EN)
I. Moir, A.Seabridge: Design and development of aircraft systems, AIAA, 2004. (EN)
E.Langton, C.Clark, M.Hewitt, L.Richards: Aircraft Fuel Systems, John Wiley & Sons, 2009
Moir, I., Seabringe, A.: Aircraft systems, John Wiley & Sons, Ltd, 2008
E.Langton, C.Clark, M.Hewitt, L.Richards: Aircraft Fuel Systems, John Wiley & Sons, 2009 (EN)
Akers, A., Gasman, M.: Hydraulic power system analysis,Taylor & Francis Group, LLC, 2006

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. Teaching is suplemented by practical laboratory work.

Assesment methods and criteria linked to learning outcomes

Awarding the course-unit credit is based on the 80% presence at exercises and correct elaboration of homework. The examination has both written and oral parts. The written one comprises solving 3 problems, the oral one consist of answering 2 questions randomly chosen by a student.

Language of instruction


Work placements

Not applicable.


Students will be familiarized with the purpose and operation principles of aircraft onboard systems. Students will understand design and construction of onboard systems with respect to aircraft reliability and flight safety.

Specification of controlled education, way of implementation and compensation for absences

If presence at lectures is less then 80%, students have to prove elaborated tasks and completed parts from missed lessons. Missed lessons can be compensated in a very limited extend by consultations with the lecturer.

Classification of course in study plans

  • Programme M2I-P Master's

    branch M-LPR , 2. year of study, winter semester, 4 credits, compulsory
    branch M-STL , 2. year of study, winter semester, 4 credits, compulsory

Type of course unit



52 hours, optionally

Teacher / Lecturer


1. Aircraft onboard systems, distribution, purpose, requirements.
2. Hydraulic systems, transmission of pressure energy.
3. Hydraulic components, requirements, performance and characteristics.
4. Hydraulic and electric servo control of airplanes, impulse control - FBW.
5. Dynamic characteristics of servo control.
6. The introduction and modification of control forces, flight control laws.
7. Pneumatic systems, braking systems and their components.
8. Aircraft fuel systems, fuel storage and refueling, pressure filling.
9. Air-conditioning systems, requirements, temperature and humidity.
10. Fire-fighting systems, de-icing system.
11. Aircraft electrical system, the requirements of regulations.
12. Zdroje elektrické energie a jejich charakteristiky.
13. Conception of power lines.


11 hours, compulsory

Teacher / Lecturer


1. Calculation of pressure loss in aircraft hydraulic system.
2. Calculation of dynamic relations in the course of pressure measurement.
3. Liquid flow, power and torque of the hydraulic pumps.
4. Calculation of the working and the hydraulic capacity of the accumulator.
5. Symbolic description of hydraulic system.
6. Modelling of properties of the landing flap by means of Matlab-Simulink.
7. Calculations of stability parameters of the hydraulic booster
8. Frequency characteristic modelling of the hydraulic booster
9. Design of the loading mechanism to the subsonic aircraft.
10. Fuel pipeline parameter calculation of the aircraft pressure fuelling.
11. Calculation of the air temperature in the aircraft cabin pressurisation.

labs and studios

2 hours, compulsory

Teacher / Lecturer


1. Measurement of the emergency pump efficiency.
2. Measurement and evaluation of the electric actuator characteristics.