70 



EXPERIMENTS IN AERODYNAMICS. 



Table XIV— Continued. 



Date. 



Description of planes. 



1890. 

 Oct. 8 



Oct. 9 



cm. cm. 

 6 X 24 inches (15.2 x 61.0) 

 Weight, 1,000 grammes. 



cm. cm. 



30x4.8 inches (76.2x12.2) 

 Weight, 500 grammes. 



.2 



o 

 'o 



o 

 o 



cm. cm. 

 30x4.8 inches (76.2x12.2) 

 Weight, 250 grammes. 



cm. cm. 

 30x4.8 inches (76.2x12.2) 

 Weight, 1.000 grammes. 



15 



10 



5 



90 



90 



90 



30 



10 



10 



5 



3 







90 



90 



30 



15 



10 



5 



3 



2 



2 







90 

 90 

 30 

 15 

 15 

 10 

 10 

 5 



Attitude of plane. 



Soaring. . . . 

 Not soaring 



Soaring . . . . 



a 

 it 



Not soaring 

 Soaring .... 



u 

 u 

 a 

 a 



Soaring. . . . 



o u 



> 



21.8 

 28.6 

 30.0 



5.0 

 6.0 

 6.2 

 10.6 

 17.9 

 12.1 

 15.2 

 21.1 

 25.0 



5.8 



4.3 



8.1 



8.3 



9.3 



13.3 



17.1 



26.1 



22.2 



27.9 



5.8 

 8.3 

 15.2 

 17.1 

 17.4 

 17.9 

 18.2 

 22.6 



bC 



3 



bC 



o 2 



O G 



X 



W 



0.40 



1.40 

 2.20 

 2.45 

 2.30 



0.75 

 0.90 

 0.45 

 0.50 

 0.90 



2.60 

 1.20 

 1.30 

 0.50 

 0.35 

 0.40 

 0.55 

 0.50 

 1.20 

 1.50 



0.7 

 1.7 

 2.2 

 1.1 

 2.3 



1.9 

 1.6 



fcC 



113 



317 

 471 

 527 

 492 

 183 

 216 

 122 

 134 

 216 



554 

 277 

 294 

 134 

 100 

 113 

 145 

 134 

 277 

 336 



490 

 909 

 1110 

 659 

 492 



416 

 355 



& be 



c ^ 





59 



166 



247 



276 



258 



96 



113 



64 



70 



113 



290 

 145 

 154 



70 

 52 

 59 

 76 

 70 

 145 

 176 



257 

 476 

 581 

 345 



258 



218 



186 



.0073 

 .0075 

 .0076 



.00138 

 .00142 

 .00145 



.0091 

 .0086 



.00173 

 .00163 



.0082 

 .0074 



.00157 

 .00141 



Average of 22 detemiinations of fc„ (at mean temperature, 16° C.) = .00816. 



