Smithsonian Report. 1934. — Loening 



Plate 1 1 



Typical of tail-surface control developnicnt arc these views of the Eoeiiij; 1j-17 bomber. 

 The upper one shows the original, and the lower one the final model at the end of World 

 War II, 6 years later — a constant increase in the fin area and rudder height. 



