74 



EXPERIMENTS IN AERODYNAMICS. 



Table X\' — Continued. 



December 11, 1890. — F. W. Very, Conductor of experiments. 



Barometer, 724 mm. ; temperature, + 5° C. ; wind velocity, 0.8 meters per second. 



Description of planes. 



30x4.8 in. (30 in. side 



horizontal). 

 AVeight, 500 grammes. 



24 X 6 in. (24 in. side 



horizontal). 

 Weight, 500 grammes. 



o 

 o 



a 



90° 

 90 

 45 

 30 

 20 

 15 

 





 10 



Attitude of 

 plane. 



Soaring . 



Soaring. 



o 



^^ 



a 



o 

 > 



8.30 

 9.15 

 11.3 



10.9 

 11.1 



20.7 



20.7 

 13.0 



ID 







a 



^ . 



O o 



a o 

 o a 

 •SO 





1.80 

 2.20 

 2.10 

 0.91 

 0.47 



0.20 



0.20 



o. ^ 







930 



1,098 



1,057 



557 



350 



59 



59 



01 



to S 



5 3 



° S 



487 

 576 

 553 

 292 

 183 



31 



31 



.0076 

 .0074 



0.00144 

 0.00140 



Remarks. 



Mean of 22 determinations of lc,n (at temiDerature 0° C.) = 0.0076. 



