NO. 5 STABILITY OF AEKOPLAXi:S— H LXSAKER AND OTHERS 



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verted to full-speed full scale as usual and divided by the mass in in 

 slugs to obtain X and Z in poinids jier unit mass on the full-size aero- 

 plane at the proper speed. 



z^/" -^ A^-" ^^- z-^' j^<^' y.y' ^^' rJ?- 



^■^f/xr o/~/f<^^^ ^/^o^c/^ ^ 



-^ 



r^° z-:^* 



Fig. p. — X, Z, and il/ for t==3 



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^60 

 f/O 



-/O 



\ N 





->e£7 



^ 



^ 



-.^.5 /^<? 



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The pitching- moment full size is obtained from the observed model 

 pitching moment about the center of gravity by an obvious manipula- 

 tion. The moment is expressed in pounds-feet per unit mass and 

 lettered M. 



