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RESUME 
of 
BRITISH RESEARCH DEVELOPMENT
IN SERVICE AIRCRAFT.

WIND TUNNELS.
One of the striking things noticed in England was the existence of wind tunnels at practically all the important aeronautical manufacturing establishments. As these vary in scale, dimensions, and characteristics, it is very hard to correlate the the data in concrete cases for comparison. I found that the principal purpose of these was to get relative data which would be close enough to show the immediate relative advantages even though they could not be applied by correction factors to accurate full scale machines.
 
The tests conducted are further valuable to ascertain conditions of fore and aft stability and for getting measurements of relative resistances.

AERODYNAMICS.

A large amount of full scale work has been done for measuring the full flight variations of different air foil sections.

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