»J8 



EXPERIMENTS IN AERODYNAMICS. 



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



and to determine their soaring speeds. 



TABLE XIV— FIRST SERIES. 



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



Date. 



Mean barometer 

 (millimeters). 



Mean temperature 

 (centigrade). 



Mean wind velocity 



(meters per second i. 



1890. 

 September 29 



October 1 

 " 2 



u ■> 



■ I 



4 



7 



" 8 



" 9 



741.0 

 738.6 

 736.6 

 735.8 

 734.5 

 727.7 



::m:,.c, 



740.1 



14° 



17 



18 



15 



19 



15 



15 



17 



1.20 



i i.;,i i 



1 1.55 

 0.60 

 0.60 



(i:;n 



Date. 



l.s'jo. 

 Sept. 29 



Oct. 1 



Oct. 2 



0< i 



Description of planes. 



24 x 6 inches (61.0x15.2) 

 Weight, 500 grammes. 



cm. cm. 

 24 x 6 inches (61.0x15.2) 

 Weight, 250 grammes. 



em. cm. 

 24 x6 inche 61 x 15.2) 

 Weight, 1,000 grami 



o 

 a> 



a 



30° 

 15 



10 



90 

 30 

 30 

 15 

 30 

 15 

 10 



5 



3 



3 



2 







90 



90 



mi 

 30 

 15 



Ki 

 5 



Attitude of plane. 



Soaring 



u 



Soaring 



tt 



a 

 tt 



it 

 a 

 tt 



Notqniir oarin 



S<.;iniiL r 



Nol 3oaring. .. . 



Soaring 



.. 

 Not soarintr 



()[)1.-,S 



.00135 

 .00146 



1 mlM 



