AE25401 Aircraft Systems and Instruments – Semester IV – Aero – R-2025

Subject Code & Name: AE25401 – Aircraft Systems and Instruments

Regulation: R-2025

Semester: IV (Fourth Semester)

Branch: B.E. Aeronautical Engineering (Aero)

Credits / L-T-P: 3 Credits | L-T-P: 3-0-0

Course Objectives

• This course provides knowledge of aircraft systems, engine systems, flight controls, and aircraft instruments used in modern aviation.
• It enables students to understand the operating principles and performance of various aircraft systems for safe and efficient aircraft operation.

Full Unit-wise Syllabus

Unit I – Aircraft Systems

Hydraulic systems – Study of typical systems – components – Hydraulic systems controllers – Modes of operation – Pneumatic systems – Working principles – Typical Pneumatic Power system – Brake system – Components, Landing Gear Systems – Classification – Shock absorbers – Retractive mechanism.

Activities: Study and demonstration of hydraulic, pneumatic, landing gear, and brake system components using models/charts/videos.

Unit II – Airplane Control Systems

Conventional Systems – Power assisted and fully powered flight controls – Power actuated systems – Engine control systems – Push pull rod system – operating principles – Modern control systems – Digital fly by wire systems – Auto pilot system.

Activities: Case study and schematic analysis of conventional and fly-by-wire flight control systems.

Unit III – Engine Systems

Piston and Jet Engines- Fuel systems – Components - Multi- engine fuel systems, lubricating systems – Starting and Ignition systems.

Activities: Identification and working analysis of piston and jet engine fuel, lubrication, ignition, and starting systems.

Unit IV – Airconditioning and Pressurizing System

Basic Air Cycle systems – Vapour Cycle Systems, Boot-strap air cycle system – Evaporative vapour cycle systems – Evaporation air cycle systems – Oxygen systems – Fire extinguishing system and smoke detection system, Deicing and anti-icing system.

Activities: Demonstration and comparative study of aircraft air-conditioning, pressurization, de-icing, and fire protection systems.

Unit V – Aircraft Instruments

Flight Instruments and Navigation Instruments – Accelerometers, Air speed Indicators – Mach Meters – Altimeters - Gyroscopic Instruments– Principles and operation – Study of various types of engine instruments – Tachometers – Temperature and Pressure gauges.

Activities: Observation and calibration study of flight and engine instruments such as altimeter, airspeed indicator, tachometer, and gyroscopic instruments.

Unit VI – Model Based Systems Engineering

Introduction to MBSE: Introduction to MBSE, MBSE Concepts, MBSE Ontology

Unit VII – Modeling Techniques and Languages

Introduction to Object Process Modeling (OPM), Object Process Language (OPL), Overview of SysML Block Definition Diagrams, Internal Block Diagrams, Use Case Diagrams, Activity Diagrams, Sequence Diagrams, State Machine Diagrams, Parametric Diagrams, Requirements Diagrams, Package Diagrams

Unit VIII – Practical Applications and Case Studies

Case Studies of MBSE, MBSE Deployment.

Course Outcomes (COs)

• CO1: Explain the operating principles and functions of aircraft hydraulic, pneumatic, engine, control, environmental, and instrumentation systems.
• CO2: Apply the principles of aircraft systems and instruments to determine the performance of flight control, engine, and environmental control systems.
• CO3: Analyze the behavior and operational characteristics of aircraft control systems, engine systems, and flight instruments under different flight conditions.
• CO4: Evaluate the efficiency, reliability, and safety of aircraft systems and instrumentation used in modern aviation applications.
• CO5: Develop suitable configurations and integrated models of aircraft systems and instruments using modern engineering tools and design concepts.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessment 40% | End Semester Examinations 60%
• Internal methodology: Quiz (5%), Assignments (25%), Review of GATE/ESE Questions (20%), Internal Examinations (50%)

Source: Official Anna University – B.E. Aeronautical Engineering R-2025 Syllabus
Last Updated: October 2026