Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/399

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EXPERIMENTAL AERODYNAMICS.
§ 244

components of the terminal vortices, so that no error shall be introduced by an allowance for the “downthrow current,” as would be necessary were the tail plane situated in the ordinary position (Fig. 151).

Weight .24 grams.
Area 1.125
+ 1.030
+ .490
———
= 2.645 sq. in.
Angle of aeroplane


Flight Data.

Distance.
Ft.
Time.
Secs.
1
2
3

4
 
30
33
28

21
 
2
2
1.8

?
 


Whence,

Mean
Mean or or,
Resistance
Aerodynamic resistance
Skin resistance ———

And area sq. in. or skin resistance per sq. ft. area—


But normal plane reaction at

377