A Course for Ground Engineers: VI.—Notes on the Non‐Metallic Materials Used in Aircraft Construction for Holders of Air Ministry “B” Licences

THE non‐metallic materials used in aircraft construction consist of a large number of different substances, to enter into any detailed discussions of which would occupy a volume of many pages. They are, however, conveniently classifiable into groups, and the reader will find, in what follows, some notes upon each group.