CHAPTER IX.
SELECTION OF THE MOTOR. Flying Machines: Construction and Operation: A Practical Book Which Shows, in Illustrations, Working Plans and Text, How to Build and Navigate the Modern Airship. | ||
Experts Fail to Agree.
Why should there be such a marked difference in the results obtained? Who knows? Some experts
Other experts argue that the difference in results
may
Sample of Two-Bladed Propeller.
[Description: Black and white illustration: Two-blade propeller.]
The fact is that propeller results depend largely upon the nature
of the aeroplanes on which they are used. A propeller, for instance,
which gives excellent results on one type of aeroplane, will not work
satisfactorily on another.
Simple Form of Propeller Used by Curtiss.
[Description: Black and white illustration: Simple one-piece propeller.]
There are some features, however, which may be safely adopted in propeller selection. These are: As extensive a diameter as possible; blade area 10 to 15 per cent of the area swept; pitch four-fifths of the diameter; rotation slow. The maximum of thrust effort will be thus obtained.
CHAPTER IX.
SELECTION OF THE MOTOR. Flying Machines: Construction and Operation: A Practical Book Which Shows, in Illustrations, Working Plans and Text, How to Build and Navigate the Modern Airship. | ||