FACULTY

APPLIED TECHNOLOGIES

DEPARTMENT

AIRCRAFT TECHNOLOGY ENGINEERING

LEVEL OF STUDIES

UNDERGRADUATE

MODULE CODE

AE3240

SEMESTER OF STUDIES

^6th

COURSE TITLE

RECIPROCATING ENGINES  

INDEPENDENT TEACHING ACTIVITIES

TEACHING HOURS PER WEEK

CREDIT UNITS

Lectures

3

3

Practice

1

2

Laboratory

2

2

COURSE TYPE

Specialty course

PRE-REQUIRED COURSES:

TEACHING AND EXAMINATION LANGUAGE

GREEK

THE COURSE IS OFFERED TO ERASMUS STUDETNS 

COURSE WEBSITE (URL)

Learning Objectives

After successfully completing the course, students should  be able to:
• Describe the operation cycles of two-stroke and four-stroke reciprocating engines and the procedures executed during the stages.
• Identify the main features of aircraft reciprocationg engines, their components and systems as well as the categories  which they belong to. 
• Analyze and apply the systems and components inspection methods  of aircraft reciprocationg engines. 
• Analyze and use mathematical formulas, read, describe and prepare drawings, simple designs and diagrams, apply carefully the knowledge they have acquired, using the manufacturer instructions, interpret the results from various sources and measurements and do corrective actions whenever needed, on topics from the material of Unit 16: RECIPROCATING ENGINE, as it is presented in part 66 of the EC Commission regulation 2042/2003.

General Skills

•               Αutonomous work

•               Group work

•               Work in international environment

Unit 1:  Thermodynamics of Reciprocating Engines. Fundamental theoretical (exemplary) operation cycles.   Mixed cycle, main characteristic magnitudes.  OTTO classic cycle.  DIESEL classic cycle.  Exemplary diagram of a two-stroke engine. Actual cycle beyond the exemplary.  Τurning moment diagram of engine  operation.   Characteristic magnitudes. Mechanical losses and level of performance. Calculation of power and   torsional moment. Determination of main dimensions of a piston engine. 

Unit 2: Diesel engines.  – Main parts of a petrol engine – diesel engine.  Distinction between four-stroke and two-stroke engines.  Four-stroke petrol engine.  Four-stroke diesel engine.  Main parts of the two-stroke petrol and diesel engines.  Tow-stroke petrol engine.  Two-stroke diesel engine.  Crankcase. Bearings.   Crankshaft.  Connecting rod.  Oil pan. Auxiliary gearbox.  Piston – piston pin – piston springs.   Cylinders – Cylinder heads. Valves. Valve motion system and camshaft.  Ignition systems. Types of magnetos, structure and operation principles.   Ignition wiring, spark plugs. Low and high voltage systems. 

Unit 3: Mechanichal, thermal and volume performance. Operating  cycles. Piston displacement and compression ratio.  Engine layout and ignition series.  Engine efficiency. Power calculation and measurement. Factors affecting  engine power. 

Unit 4: Mixtures / mixture regulation, pre-ignition. Engine structure. Crank housing, crankshaft, camshaft, oil  pan.  Auxiliary gearbox. Cylinder and Piston systems. Connecting rods, inlet and exhaust pipes. Valve mechanisms. Propeler reduction gears.  

Unit 5: Engine Fuel systems.  Mixers. Types, structure and operation principles.  Ιcing and heating. Fuel injection systems. Types, structure and operation principles.  Start and ignition systems. Types of magnetos, structure and operation principles.   Ignition wiring, spark plugs. Low and high voltage systems.   

Unit 6: Induction systems, Exhaust and cooling systems, Structure and operation of induction systems, including air exchanger systems. Exhaust systems and engine cooling systems.

Unit 7:  Supercompression/Turbocharging. Principles and purpose of supercompression and its effects on the engine parameters. Structure and operation of supercompression/turbocharging systems. System terminology. Control systems. System protection. 

Unit 8:  Lubricants and fuels. Properties and specifications. Fuel additives. Safety precautions. Lubrication systems. System operation/device and components.

Unit 9:   Engine indication systems. Engine speed. Cylinder head temperature. Oil pressure and temperature. Exhaust gases temperature. Fuel flow and pressure. Intake pressure.

Unit 11:  Power plant installation.   Fire protection diaphragms, engine cowlings, acoustic panels, engine bases,  engine bases, anti-vibration mounts, flexible tubes, ducts, power supply, couplers, cable coating, cables and control rods, suspension and drainage points.

Unit 12:   Engine monitoring systems and Ground operation. Procedures of engine starting and testing on the ground.  Interpretation of engine power output and parameters. Inspection of engine and components: criteria, tolerances and data determined by the engine manufacturer. Engine storage and protection.  Protection and reoperation of engine and components/systems.

1^st Lab Activity: Main parts of aircraft piston engine.

2^nd Lab Activity: Basic tools for aircraft piston engine repair.

3^rd Lab Activity: Removal and re-installation of aircraft piston engine.

4^th Lab Activity: Aircraft piston engine disassembly and assembly methods

5^th Lab Activity: Valve clearance adjustment and spark plug check.

6^th Lab Activity: Magneto replacement and synchronization, ignition wiring inspection. 

7^th Lab Activity: Removal, inspection and assembly of lubrication system components.

8^th Lab Activity: Removal, inspection and assembly of aircraft piston engine fuel pump.

9^th Lab Activity: Machining of aircraft piston engine components on tool machines.

10^th Lab Activity: Wear measurements in piston engine components.

11^th Lab Activity: Crankshaft balancing on aircraft piston engine.

TEACHING METHOD

In the classroom

USE OF INFORMATION AND COMMUNICATION TECHNOLOGIES
ς

Specific Thermodynacis software with Otto and Diesel cycle analysis

Support of learning procedure through the use of e-class platformΥποστήριξη

TEACHING ORGANIZATION

STUDENT EVALUATION

Ι. Final written examination  (100%) including:

–                     Multiple choice questions

–                     Problem Solving on piston engine performance

-Suggested Bibliography :

1)            ”Aircraft Propulsion-A review of the evolution of Aircraft Piston Engines”, C.Fayette Taylor, Smithsonian Annals of Flight, Vol.1, No 4, Smithsonian Institution Press 1971.

2)            “Airframe and Powerplant Mechanics”, FAA EA-AC65-12A

3)            “Training Manual Powerplant Section Book 1”, EA-ITP-P1, Aviation Maintenance Publishers Inc.

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