Aeronautical Engineer’s Data Book Clifford Matthews BSc, CEng, MBA, FIMechE OXFORD AUCKLAND BOSTON JOHANNESBURG MELBOURNE NEW DELHI Butterworth-Heineman Linacre House, Jordan Hill, Oxford OX2 8DP 225 Wildwood Avenue, Woburn, MA 01801-2041 A division of Reed Educational and Professional Publishing Ltd A member of the Reed Elsevier plc group First published 2002 © Clifford Matthews 2002 All rights reserved. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1P 9HE. Applications for the copyright holder’s written permission to reproduce any part of this publication should be addressed to the publishers British Library Cataloguing in Publication Data Matthews, Clifford Aeronautical engineer’s data book 1. Aerospace engineering–Handbooks, manuals, etc. I. Title 629.1’3 Library of Congress Cataloguing in Publication Data Matthews, Clifford. Aeronautical engineer’s data book / Clifford Matthews. p. cm. Includes index. ISBN 0 7506 5125 3 1. Aeronautics–Handbooks, Manuals, etc. I. Title. TL570.M34 2001 629.13'002'12–dc21 2001037429 ISBN 0 7506 5125 3 Composition by Scribe Design, Gillingham, Kent, UK Printed and bound by A. Rowe Ltd, Chippenham and Reading, UK Contents Acknowledgements vii Preface ix Disclaimer x 1 Important Regulations and Directives 1 2 Fundamental Dimensions and Units 6 2.1 The Greek alphabet 6 2.2 Units systems 7 2.3 Conversions 8 2.4 Consistency of units 20 2.5 Foolproof conversions: using unity brackets 21 2.6 Imperial–metric conversions 22 2.7 Dimensional analysis 22 2.8 Essential mathematics 25 2.9 Useful references and standards 47 3 Symbols and Notations 49 3.1 Parameters and constants 49 3.2 Weights of gases 49 3.3 Densities of liquids at 0°C 50 3.4 Notation: aerodynamics and fluid mechanics 50 3.5 The International Standard Atmosphere (ISA) 56 4 Aeronautical Definitions 66 4.1 Forces and moments 66 4.2 Basic aircraft terminology 70 4.3 Helicopter terminology 71 4.4 Common aviation terms 72 4.5 Airspace terms 75 5 Basic Fluid Mechanics 76 5.1 Basic properties 76 5.2 Flow equations 79 iv Contents 5.3 Flow regimes 86 5.4 Boundary layers 88 5.5 Isentropic flow 89 5.6 Compressible 1D flow 90 5.7 Normal shock waves 91 5.8 Axisymmetric flow 93 5.9 Drag coefficients 94 6 Basic Aerodynamics 96 6.1 General airfoil theory 96 6.2 Airfoil coefficients 96 6.3 Pressure distributions 98 6.4 Aerodynamic centre 100 6.5 Centre of pressure 101 6.6 Supersonic conditions 102 6.7 Wing loading: semi-ellipse assumption 103 7 Principles of Flight Dynamics 106 7.1 Flight dynamics – conceptual breakdown 106 7.2 Axes notation 106 7.3 The generalized force equations 110 7.4 The generalized moment equations 110 7.5 Non-linear equations of motion 111 7.6 The linearized equations of motion 111 7.7 Stability 114 8 Principles of Propulsion 115 8.1 Propellers 115 8.2 The gas turbine engine: general principles 118 8.3 Engine data lists 126 8.4 Aero engine terminology 126 8.5 Power ratings 129 9 Aircraft Performance 132 9.1 Aircraft roles and operational profile 132 9.2 Aircraft range and endurance 136 9.3 Aircraft design studies 138 9.4 Aircraft noise 140 9.5 Aircraft emissions 144 10 Aircraft Design and Construction 145 10.1 Basic design configuration 145 10.2 Materials of construction 164 10.3 Helicopter design 165 10.4 Helicopter design studies 168 Contents v 11 Airport Design and Compatibility 173 11.1 Basics of airport design 173 11.2 Runway pavements 196 11.3 Airport traffic data 197 11.4 FAA-AAS airport documents 197 11.5 Worldwide airport geographical data 205 11.6 Airport reference sources and bibliography 205 12 Basic Mechanical Design 215 12.1 Engineering abbreviations 215 12.2 Preferred numbers and preferred sizes 215 12.3 Datums and tolerances – principles 217 12.4 Toleranced dimensions 218 12.5 Limits and fits 223 12.6 Surface finish 227 12.7 Computer aided engineering 224 13 Reference Sources 235 13.1 Websites 235 13.2 Fluid mechanics and aerodynamics 235 13.3 Manufacturing/materials/structures 235 13.4 Aircraft sizing/multidisciplinary design 240 13.5 Helicopter technology 240 13.6 Flying wings 240 13.7 Noise 241 13.8 Landing gear 241 13.9 Airport operations 241 13.10Propulsion 242 Appendix 1 Aerodynamic stability and control derivatives 243 Appendix 2 Aircraft response transfer functions 245 Appendix 3 Approximate expressions for dimensionless aerodynamic stability and control derivatives 247 Appendix 4 Compressible flow tables 253 Appendix 5 Shock wave data 261 Index 269 Preface The objective of this Aeronautical Engineer’s Data book is to provide a concise and useful source of up-to-date information for the student or practising aeronautical engineer. Despite the proliferation of specialized infor­ mation sources, there is still a need for basic data on established engineering rules, conver­ sions, modern aircraft and engines to be avail­ able in an easily assimilated format. An aeronautical engineer cannot afford to ignore the importance of engineering data and rules. Basic theoretical principles underlie the design of all the hardware of aeronautics. The practical processes of fluid mechanics, aircraft design, material choice, and basic engineering design form the foundation of the subject. Technical standards, directives and regulations are also important – they represent accumu­ lated knowledge and form invaluable guide­ lines for the industry. The purpose of the book is to provide a basic set of technical data that you will find useful. It is divided into 13 sections, each containing specific ‘discipline’ information. Units and conversions are covered in Section 2; a mixture of metric and imperial units are still in use in the aeronautical industry. Infor­ mation on FAA regulations is summarized in Section 1 – these develop rapidly and affect us all. The book contains cross-references to other standards systems and data sources. You will find these essential if you need to find more detailed information on a particular subject. There is always a limit to the amount viii Preface of information that you can carry with you – the secret is knowing where to look for the rest. More and more engineering information is now available in electronic form and many engineering students now use the Internet as their first source of reference information for technical information. This new Aeronautical Engineer’s Data Book contains details of a wide range of engineering-related websites, including general ‘gateway’ sites such as the Edinburgh Engineering Virtual Library (EEVL) which contains links to tens of thousands of others containing technical infor­ mation, product/company data and aeronauti- cal-related technical journals and newsgroups. You will find various pages in the book contain ‘quick guidelines’ and ‘rules of thumb’. Don’t expect these all to have robust theoret­ ical backing – they are included simply because I have found that they work. I have tried to make this book a practical source of aeronautics-related technical information that you can use in the day-to-day activities of an aeronautical career. Finally, it is important that the content of this data book continues to reflect the infor­ mation that is needed and used by student and experienced engineers. If you have any sugges­ tions for future content (or indeed observations or comment on the existing content) please submit them to me at the following e-mail address: [email protected] Clifford Matthews Acknowledgements Special thanks are due to Stephanie Evans, Sarah Pask and John King for their excellent work in typing and proof reading this book. Disclaimer This book is intended to assist engineers and designers in understanding and fulfilling their obligations and responsibilities. All interpreta­ tion contained in this publication – concerning technical, regulatory and design information and data, unless specifically otherwise identi­ fied, carries no authority. The information given here is not intended to be used for the design, manufacture, repair, inspection or certification of aircraft systems and equipment, whether or not that equipment is subject to design codes and statutory requirements. Engineers and designers dealing with aircraft design and manufacture should not use the information in this book to demonstrate compliance with any code, standard or regula­ tory requirement. While great care has been taken in the preparation of this publication, neither the author nor the publishers do warrant, guarantee, or make any representa­ tion regarding the use of this publication in terms of correctness, accuracy, reliability, currentness, comprehensiveness, or otherwise. Neither the publisher, author, nor anyone, nor anybody who has been involved in the creation, production, or delivery of this product shall be liable for any direct, indirect, consequential, or incidental damages arising from its use.