Butterworth-Heinemann's Aircraft Engineering Principles and Practice Series provides students, apprentices and practicing aerospace professionals with the definitive resources to advance their aircraft engineering maintenance studies and career. This book provides an introduction to the principles of communications and navigation systems. It is written for anyone pursuing a career in aircraft maintenance engineering or a related aerospace engineering discipline, and in particular will be suitable for those studying for licensed aircraft maintenance engineer status. The book systematically addresses the relevant sections (ATA chapters 23/34) of modules 11 and 13 of part-66 of the EASA syllabus. It is ideal for anyone studying as part of an EASA and FAR-147 approved course in aerospace engineering. * Delivers the essential principles and knowledge base required by Airframe and Propulsion (A&P) Mechanics for Modules 11 and 13 of the EASA Part-66 syllabus and BTEC National awards in aerospace engineering * Supports Mechanics, Technicians and Engineers studying for a Part-66 qualification * Comprehensive and accessible, with self-test questions, exercises and multiple choice questions to enhance learning for both independent and tutor-assisted study

Chapter 1 Introduction 1.1 The radio frequency spectrum 1.2 Electromagnetic waves 1.3 Frequency and wavelength 1.4 The atmosphere 1.5 Radio wave propagation 1.6 The ionosphere 1.7 MUF and LUF 1.8 Silent zone and skip distance 1.9 Multiple choice questions Chapter 2 Antennas 2.1 The isotropic radiator 2.2 The half-wave dipole 2.3 Impedance and radiation resistance 2.4 Radiated power and efficiency 2.5 Antenna gain 2.6 The Yagi beam antenna 2.7 Directional characteristics 2.8 Other practical antennas 2.9 Feeders 2.10 Connectors 2.11 Standing wave ratio 2.12 Waveguide 2.13 Multiple choice questions Chapter 3 Transmitters and receivers 3.1 A simple radio system 3.2 Modulation and demodulation 3.3 AM transmitters 3.4 FM transmitters 3.5 Tuned radio frequency receivers 3.6 Superhet receivers 3.7 Selectivity 3.8 Image channel rejection 3.9 Automatic gain control 3.10 Double superhet receivers 3.11 Digital frequency synthesis 3.12 A design example 3.13 Multiple choice questions Chapter 4 VHF communications 4.1 VHF range and propagation 4.2 DSB modulation 4.3 Channel spacing 4.4 Depth of modulation 4.5 Compression 4.6 Squelch 4.7 Data modes 4.8 ACARS 4.9 VHF radio equipment 4.10 Multiple choice questions Chapter 5 HF communications 5.1 HF range and propagation 5.2 SSB modulation 5.3 SELCAL 5.4 HF data link 5.5 HF radio equipment 5.6 HF antennas and coupling units 5.7 Multiple choice questions Chapter 6 Flight-deck audio systems 6.1 Flight interphone system 6.2 Cockpit voice recorder 6.3 Multiple choice questions Chapter 7 Emergency locator transmitters 7.1 Types of ELT 7.2 Maintenance and testing of ELT 7.3 ELT mounting requirements 7.4 Typical ELT 7.5 Cospas?Sarsat satellites 7.6 Multiple choice questions Chapter 8 Aircraft navigation 8.1 The earth and navigation 8.2 Dead reckoning 8.3 Position fixing 8.4 Maps and charts 8.5 Navigation terminology 8.6 Navigation systems development 8.7 Navigation systems summary 8.8 Multiple choice questions Chapter 9 Automatic direction finder 9.1 Introducing ADF 9.2 ADF principles 9.3 ADF equipment 9.4 Operational aspects of ADF 9.5 Multiple choice questions Chapter 10 VHF omnidirectional range 10.1 VOR principles 10.2 Airborne equipment 10.3 Operational aspects of VOR 10.4 Multiple choice questions Chapter 11 Distance measuring equipment 11.1 Radar principles 11.2 DME overview 11.3 DME operation 11.4 Equipment overview 11.5 En route navigation using radio navigation aids 11.6 Multiple choice questions Chapter 12 Instrument landing system 12.1 ILS overview 12.2 ILS ground equipment 12.3 ILS airborne equipment 12.4 Low range radio altimeter 12.5 ILS approach 12.6 Autoland 12.7 Operational aspects of the ILS 12.8 Multiple choice questions Chapter 13 Microwave landing system 13.1 MLS overview 13.2 MLS principles 13.3 Aircraft equipment 13.4 Ground equipment 13.5 MLS summary 13.6 Multiple choice questions Chapter 14 Hyperbolic radio navigation 14.1 Hyperbolic position fixing 14.2 Loran overview 14.3 Loran-C operation 14.4 Loran-C ground equipment 14.5 Loran-C airborne equipment 14.6 Enhanced Loran (eLoran) 14.7 Multiple choice questions Chapter 15 Doppler navigation 15.1 The Doppler effect 15.2 Doppler navigation principles 15.3 Airborne equipment overview 15.4 Typical Doppler installations 15.5 Doppler summary 15.6 Other Doppler applications 15.7 Multiple choice questions Chapter 16 Area navigation 16.1 RNAV overview 16.2 RNAV equipment 16.3 Kalman filters 16.4 Required navigation performance 16.5 Multiple choice questions Chapter 17 Inertial navigation systems 17.1 Inertial navigation principles 17.2 System overview 17.3 System description 17.4 Alignment process 17.5 Inertial navigation accuracy 17.6 Inertial navigation summary 17.7 System integration 17.8 Multiple choice questions Chapter 18 Global navigation satellite system 18.1 GPS overview 18.2 Principles of wave propagation 18.3 Satellite navigation principles 18.4 GPS segments 18.5 GPS signals 18.6 GPS operation 18.7 Other GNSS 18.8 The future of GNSS 18.9 Multiple choice questions Chapter 19 Flight management systems 19.1 FMS overview 19.2 Flight management computer system 19.3 System initialisation 19.4 FMCS operation 19.5 FMS summary 19.6 Multiple choice questions Chapter 20 Weather radar 20.1 System overview 20.2 Airborne equipment 20.3 Precipitation and turbulence 20.4 System enhancements 20.5 Lightning detection 20.6 Multiple choice questions Chapter 21 Air traffic control system 21.1 ATC overview 21.2 ATC transponder modes 21.3 Airborne equipment 21.4 System operation 21.5 Automatic dependent surveillance-broadcast 21.6 Communications, navigation and surveillance/air traffic management 21.7 Multiple choice questions Chapter 22 Traffic alert and collision avoidance system 22.1 Airborne collision avoidance systems 22.2 TCAS overview 22.3 TCAS equipment 22.4 System operation 22.5 Multiple choice questions Appendices 1 Abbreviations and acronyms 2 Revision papers 3 Answers 4 Decibels Index

Mike Tooley, BA; Advanced Technological and Higher National Certificates, Kingston University, Formerly Vice Principal, Dean of Faculty and Head of Engineering at Brooklands College, Surrey, UK David Wyatt, Design Manager, Lees Avionics, UK; formerly avionics lecturer, Brooklands College; product support engineer, Lear Siegler (B737 FMCS) and development engineer, British Airways (B747 avionic systems)

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