Alex Weiss established a model engineering workshop over forty years ago and has written numerous books and articles, mainly about model making. All the burners described in this book have been designed, built and tested in working boilers by Alex and Kevin Walton, who has provided extensive technical support. Kevin Walton, a professional consulting engineer, has many years' experience working with industrial commercial steam and hot-water boilers, also heating and ventilation systems. He has a well-equipped workshop and has built many different steam engines for boats, lorries and static use. He has also built the boilers to power them.