(Paperback)

Children are asked to spot differences in 27 sets of brain teasers, among them 2 pictures of a dog and his friend and backyard scenes of fluttering butterflies.

(Hardback)

Designing and building a miniature aero-engine is an exciting and rewarding task. Whether a professional engineer or an amateur looking to build an engine to fly your model aeroplane, this book helps you guide through all the stages of designing and constructing an aero-engine in your workshop at home.

(Paperback)

This book is a practical guide to the aerodynamic principles of the 'aerofoil' and the way that wings produce lift, which is vital to establishing flight. Included are over forty ready-to-use aerofoil sections in a range of typical sizes, together with a detailed method of plotting these sections on a home computer.

(Paperback)

(Paperback)