68 



EXPERIMENTS IN AERODYNAMICS. 



Experiments with the Component Pressure Recorder to measure the horizontal pressure on nornud and inclined planes 



and to determine their soaring speeds. 



TABLE XIV— FIRST SERIES. 



F. W. Very, Conducting experiments; Joseph Ludewig, Regulating engine. 



Date. 



1890. 

 Sept. 29 



Oct. 1 



Oct. 2 



Description of planes. 



Oct. 



era. cm. 

 24x6 inches (61.0x1-5.2) 

 Weiglit, 500 grammes. 



cm. cm. 

 24x6 inches (61.0x15.2) 

 Weight, 250 grammes. 



im. cm. 

 24x6 inches (61.0x15.2) 

 Weight, 1,000 grammes. 



o 



a 



< 



30° 



15 



10 



90 

 30 

 30 

 15 

 30 

 15 

 10 



5 



3 



3 



2 







90 

 90 

 90 

 30 

 15 

 10 



Attitude of plane. 



Soaring 



a 



Soaring 



a 

 a 



u 

 u 



a 



Not quite soaring 



Soaring 



If 



Not soarin^j; 



Soaring 



u 

 u 



Not soaring 



.00158 



.00135 

 .00146 

 .00151 



