The Design of Screw Propellers, With Special Reference to Their Adaptation for Aircraft (Classic Reprint)

This l)o )k his Ui Mi writuii partly on reqaeet and partly wi Ui the okjael of placing oil record, for whai ihay A re worth, the resiut Bof experieooe liiitnl in connection with Hervice aircraft. Those who search the book in the hope of finding a strictly loffieal and mathemntical theory of the behaviour of a screw propeller will be disappointed. Those, however, who read with the object of learning bow to design a propeller for actual use, will, it is hoped, be more satiafied. It is for such readers that the book is intended. For the former t MkT hiw Gneither the inclihation nor the mathematical knowledge. A a Is the latter, it was my fortune during the war to be in charge, first Admiralty and later at the A ir Ministry, of technical work in lion with propellers for aircraft, and it therefore happened that propellers used on British aeroplanes, seaplanes and air4ed either by myself or under my direct superision. i ilied is my justification for attempting this work. i.... ... w;ay work with the British Government Departments, this opportunity is taken of recognizing the help ven by all the members of my staff, but in particular I would mention that of Major F. E. Pollard, R.A.F., A-RC.S., who ably seconded me throughout practically the whole of the time during which I held the poet In this work I have used the term propeller, although aware that the technical terms committee of the Boyai Aeronautical Society was about to reooffnize the term airscrew in preference to propeller. I have argued as strongly for the one as for the other, and am inclined to think that the more logical arguments are in favour of the term airhcrew, which has the additional advantage of being a literal traoalation of the French hlice arienne and the German Laftochraabe. But unfortunately language is not based on logic. Custom and usage are the ultimate sanctions of the use of words, an
(Typographical errors above are due to OCR software and don't occur in the book.)