by using a greater assortment of motors and propellers or by the use of an intermediate speed 
changer. Final determination should be based on both a hydrodynamic and an electrical 
evaluation of requirements. 
9. ACKNOWLEDGMENTS 
The radio-control system was designed by members of the engineering divisions of the 
Industrial Department. The final system requirements were the result of conferences between 
Mr. W.F. Brownell, Mr. S.C. Gover, and Mr. F.D. Bradley of the Hydromechanics Laboratory; 
Mr. H.E. Prucha and Mr. P.M. Douglass, Jr. of the Facilities Division; and Mr. W.S. Campbell 
and the author of the Instrumentation Division. 
The control-system design was done by the author with many valuable suggestions con- 
tributed by Mr. Campbell, both of the Instrumentation Division. Design of the powering and 
propulsion equipment was handled by Mr. Douglass and Mr. R.C. Goodson of the Facilities 
Division. Mr. Stern of the Instrumentation Division designed the mechanical portions of the 
rudder servo system. 
Mr. Goodson also participated in the final system checkout and prepared the sections 
of this report which concern the powering and propulsion equipment. 
