Foreword

To offer one more book on engineering drawing when so many are available already may seem to be imprudent. However, it is an unfortunate fact, so far as the model engineer and amateur machinist is concerned, that almost all the existing books are either directed to the passing of examinations or intended to be used in conjunction with class teaching, or both. As a result the reader is faced with much matter which does not apply to workshop use and, at the same time, finds many gaps. This is inevitable, for to 'meet the syllabus' much theory must be covered and the class teacher of course, fills in the gaps. I know of only one book which could enable a raw beginner to learn to make (and hence to read) drawings from a clean sheet of paper* and that, unfortunately, seems to be out of print and, in any case, is based entirely on American practice.

In writing this book I have had in mind just those problems. I have tried to eliminate the academic theory, and to concentrate on the essentials needed to make good drawings. However, I must emphasise two things. First, engineering drawing is a highly disciplined subject. If complex machine parts are to be represented accurately on flat sheets of paper the rules must be observed; the conventions and the grammar' are both vital, and you will ignore them at your peril.

Technical Drawing by Giesecke, Mitchell & Spencer (New York, Macmillan 1944)

Secondly, in order to learn to read drawings it is necessary to know how they are made, and to know that you must make them yourself. So, right though the book, practise as you read. Don't leave It until later. I would emphasise, too, that 'mere sketching' is not to be disdained. Indeed, if pressed, I would assert that the ability to make a good sketch is more important than the making of a good drawing. There is really, no such thing as a 'mere' sketch! In fact, you will find that some of the illustrations in this book are sketches - two straight from the bench!

I have followed the current British Standard No 308 Drawing Office Practice throughout, but have retained some aspects of the earlier standards that are still acceptable, and which are easier both to follow and to execute than those currently 'preferred'. There Is a world of difference in this respect between the needs of the industrial production department and those of the model engineer and jobbing machinist. I have included examples in both metric and imperial conventions of dimensioning, although most of the 'rules' on this aspect apply to either system.

I hope that you will find the book useful; and, even more, that you may come actually to enjoy making drawings. It is a very satisfying occupation.

Tubal Cain.

Longsleddale, Westmorland.

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Freehand Sketching An Introduction

Freehand Sketching An Introduction

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