312 ANIMAL MKCHAInICS- 



Wing of Wood Pigeon. 



Angle. 



l-V. 



I sin 6 



sin 0. 



o°.oo' 



1 1 



+ 19 



4 16 



5 -20 



76 



+ 23 



+ 8 



10 .40 



96 



+ 13 



+ 4 



16 .00 



i'5 



0 



0 



21 .20 



129 



- 15 



- 3 



26 .40 



i43 



- 3i 



- 5 



32 .OO 



180 



- 49 



- 8 



From these values the following Table is calculated : — 



Wing of Wood Pigeon. 



Angle. 



1 



(l+l') sine 

 l-V ~ 



IV sin 2 0 

 I- V 



" o°.oo' 



0. 0909 i 



+ 3.18.8 



27.64 



5 -20 



0. 01317 



+ 0.4080 



2.42 



10 .40 



0. 01041 



+ 0. 177° 



0.54 



16 .00 



0. 00869 



0. 0000 



0.00 



2 1 .20 



0.00775 



- 0. 1393 



0.3.5 



26 .40 



0. 00699 



- 0.2517 



1.08 



32 .OO 



0. 00641 



— 0. 3166 



2. 18 



Sum, 0-14433 



3-0592 



34-21 



From these values, we can readily calculate, 



Q 2 -4PP = ~ 10.391. 



Since this quantity is negative, the equilibrium of the wing 

 is always stable, with respect to axes of rotation parallel to 



or. 



The position of the axis of minimum stability is found as 

 before ? 



8-i2£S25,- I0 .6o. 

 0.14433 



