Appendix A: Image credits

Everything in this book that is not listed below, the text, the figures, the photographs and the animations, is our own work and is released under the Creative Commons Attribution 4.0 licence (CC BY 4.0). You may copy, adapt and reuse it for any purpose, commercial or not, as long as you credit the book.

Most figures in this book are our own drawings, made either with python scripts or manual vector graphics. The figures listed here contain, in whole or in part, work by others that is shared under an open licence. We thank the authors for making it available.

A figure that contains material under a share-alike licence (CC BY-SA) is itself released under the same licence.

Figure	Content	Author	Source	Licence
Figure 4.2	Right-hand rule for the cross product, drawing	Acdx	Wikimedia Commons	CC BY-SA 3.0
Figure 10.1	Right-hand rule for the cross product, drawing (right)	Acdx	Wikimedia Commons	CC BY-SA 3.0
Figure 10.1	Right-hand grip rule, drawing (left)	Wizard191, after Schorschi2	Wikimedia Commons	Public domain
Figure 15.6	Sheet winch on a sailing boat, photograph	Jeuwre	Wikimedia Commons	CC BY-SA 4.0
Figure 14.8, Figure 18.29	Tractor drawing, cropped and mirrored	Twitter, Inc. (Twemoji)	Wikimedia Commons	CC BY 4.0
Figure 18.21	Airbus A380, top view from a three-view drawing	Adam001d	Wikimedia Commons	CC BY-SA 3.0
Figure 18.21	Saab JAS 39 Gripen, top view from a three-view drawing	Kaboldy	Wikimedia Commons	CC BY-SA 3.0
Figure 33.25	Meadow gate on Tjärö, Blekinge, photograph	Annalovisa	Wikimedia Commons	CC BY-SA 4.0
Figure 36.2	Involute spur gears meshing, animation	M. D. Lebedev	Wikimedia Commons	CC BY 4.0
Figure 37.1	Synchronous belts and pulleys, photograph	Walther Flender	Wikimedia Commons	CC BY-SA 4.0
Figure 37.2	Belt drive profiles, drawing	Wittiko	Wikimedia Commons	CC BY 4.0
Figure 37.4	Belt drive layouts, drawing	Christophe Dang Ngoc Chan	Wikimedia Commons	CC0 1.0
Figure 37.5	Toothed belt entering a flanged pulley, drawing	Superyoyo	Wikimedia Commons	CC BY-SA 3.0
Figure 37.6	Engine timing belt, photograph	Logansenf	Wikimedia Commons	CC BY-SA 4.0
Figure 37.12	Belt-driven 3D printer axis, photograph	watsdesign	Wikimedia Commons	CC BY 2.0