Free Engineering Textbook

This is our free engineering textbook. This book is made available, without charge, to all. This book references only free public domain sources that are linked from the text and hosted by Abbott Aerospace. This book links to free spreadsheet methods for all analysis methods in the book, also hosted by Abbott Aerospace.

This document is intended to provide general structures engineering guidance for the development of metallic and fiber composite aircraft parts.

This book is not an academic textbook and does not show the mathematical theory behind the methods. There are many fine books that provide that information. This book is a collection of practical stress analysis methods and tools; the aim is to give useful numerical methods for basic sizing that will give an engineer the means to carry out an analysis with confidence.

All methods in this document have been either cited from public domain sources or derived from first principles. Every effort has been made to cite sources and the reader is encouraged to use the links to examine the sources for a broader understanding of the particular method

This document is generally applicable to part 23 and part 25 primary and secondary structures. However, there are varying airworthiness standards and interpretation of standards across different jurisdictions and consultation with the relevant local certification agency is essential.