308 



SMITHSONIAN' CONTRIBUTIONS TO KNOWLEDGE 



VOL. '27 



DATA SHEET No. 12. 



Weigh! of Aerodrome, One-Quarter Model. 



Certified to by (has. M. Manly, June 11, 1901. 



Rev, x dinm. x pitch ratio x thrust 

 33000 



t This is calculated on the assumption that the center of pressure on each win:.' or on pair "f winirs at .1 motion ,,f 2000 feet per 

 minute is 111 ordinary curved wings 2 5 the way from fronl to rear, that for wings ol usual size tin- rear wings have 2-3 of the 

 .""■"" " f " and that the tail proper bears no pari ,.f the weight: hut if rear wins is smaller or larger 



"i per unit of surface. 



