Course detail

Aircraft On-Board Systems I

FSI-OPZAcad. year: 2015/2016

Basic laws of pressure energy transfer, 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 put on hydraulic servo control systems, dynamic properties and velocity characteristics of hydraulic boosters. Control forces modification. Fuel systems, pressure fuelling. Air condition systems, fire-fighting protection systems, ice protection systems, requirements and construction.

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, 1st thermodynamic law. Basic knowledge of mechanics.


Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

Letecké předpisy FAR 23/CS 23, FAR 25/CS 25
J.A.A.: Aircraft general knoledge 1 - Airframes and Systems, Jeppesen Oxford, 2001 (EN)
I. Moir, A.Seabridge: Design and development of aircraft systems, AIAA, 2004.
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
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



26 hours, optionally

Teacher / Lecturer


1. Transfer of pressure energy, hydraulic resistance, inductance and capacity.
2. Hydraulic pressure systems with pressure and flow regulation.
3. Working pressure circuits, emergency circuits.
4. Hydraulic elements, requirements put on their function and characteristics.
5. Pneumatic systems, brake systems and their elements.
6. Aircraft servo control systems, impulse control - FBW.
7. Hydraulic boosters with single and dual piston chamber.
8. Modelling of servo control dynamic properties.
9. Set up and modification of control forces, loud mechanisms, fly control lows
10. Aircraft fuel systems, fuel storage and refuelling, pressure fuelling.
11. Air conditioning systems, requirements, adjustment systems of the temperature, pressure and humidity.
12. Fire-fighting systems, warning systems and extinguish, their parameters and constructions.
13. Ice protection systems, conditions of icing, ground de-icing.


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 dynamic properties of the landing flap by means of Matlab-Simulink.
7. Calculations of stability parameters of the hydraulic booster with single piston chamber.
8. Frequency characteristic modelling of the hydraulic booster with dual piston chamber.
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. The measurement of the flow delivery and the efficiency characteristics of the aircraft emergency hydraulic pump.
2. The measurement and the evaluation of the frequency characteristics of the hydraulic booster with dual piston chamber.