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Aviation History
1929
1929 - 0641.PDF
MARCH 28, 1929 21 THE AIRCRAFT ENGINEER SUPPLEMENT TOFLIGHT The Armstrong-Whitworth Wind Tunnel : General View. The rectangular part of the tunnel is 22 ft., and the regenera- tive cone between the rectangular portion and the fan is 24 ft. long. The rectangular portion has a slight taper of 18 mins. and this eliminates the static pressure gradient. The Armstrong-Whitworth Wind Tunnel : Propeller and Motor. The tunnel is supported by structural steel work. The working portion is made up of pitch pine. The regenerative cone is made up of three-ply wood instead of the more usual sheet steel in order to reduce drumming to a minimum. This has been particularly effective, as the tunnel can be The Armstrong-Whitworth Wind Tunnel at Whitley : On the left are seen the motor starter and manometer, and on the right is an inside view of the tunnel itself, seen from the flare end. The door which gives access to the tunnel is seen on the extreme right. 258* ' . .
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