NO. 5 STABILITY OF AEROPLANES HUNSAKER AND OTHERS 



29 



tea 





/^rrf/^ ^y AfO/7^ C/^o^cy, ^ 



'/6' -/-i^' -/^' -/<^* -<3'' -6' -^' -^' o' r-^' t-^' ^(5" 



Fig. II. — -Y, Z, and M for t= 12°. 



V— —54 foot-seconds (low speed, 36.9 miles per hour), 

 ^Q = o, j=i2°, normal attitude. 



i° ^' A' Z M 



-4 -16 +1.87 - 3.0 +11.6 



o -I-' +3-58 + 6.8 + 5.30 



+ 4 - 8 +4.84 +17.4 - 5.32 



8 - 4 +5.02 +26.6 -1^-5 



12 o +4.38 +32.3 -174 



16 4 +5.24 +34.2 -23.6 



18 6 +6.78 +33.4 -36.5 



When ^ = 0, note that Z,j should equal -^2.2 or g, a check on the 



table. 



Curves of X, Z, M for the four speed conditions are given on 

 figures 8, 9, 10, and 11. These curves are not " faired," but drawn 

 3 



