Oovid Taylor Model Basin. Report 984. 



A SIX CHANNEL BALANCING UNIT TYPE 1000-A FOR USE 

 WITH DC OPERATIONAL AMPLIFIERS, by Henry B.O. Davis. 

 Dec 1967. ii, 14p. incl. figs., refs. (Industrial Department 

 Research and Development Report) UNCLASSIFIED 



A 6-channel balancing unit used to reduce drift in dc operation- 

 al amplifiers is described. Although designed specifically for 

 stabilizing the TMB Type 176-A amplifiers used in the Bureau of 

 '^8^ • Ships Analog Computer BUSAC, it may be used with any opera- 



'' tional amplifier having a differential input stage. 



The use of this balancing unit has reduced amplifier drift in the 

 BUSAC computer to a negligible quantity. 



985. Static Tests on CW-1T7A/u Sonar Domes to Determine Adeqviacy of Struct- 



ural Reinforcement, by Eobert D. Short, Jr., ^^ron E. Lunchick, Ph. D., 

 and Harry P. Rietman. Sep 1955' 22 pp., 1^4^ figs. Distributed only upon 



authorization of Bureau of Ships, 



986. (NS 715-102). A Procedure to Impart Specified Dynamical Properties 



to Ship Models, by Howard E. Reiss. Mar I956. IQ pp., 1 fig. 



987. Determination of the Motion of a Body from Measurements of Flow Ahead 



of the Body, by L. Landweber, Ph.D. and M.A. Todd. Apr I956. 37 

 pp., \ figs. 



989. (NS 715-086). Maneuvering and Turning Tests of Model i»-531 Representing 



the Small Cargo Ship (Ice Strengthened) AKA, by r.D. Bradley and 



W.G. Surber, Jr. Sep 1955- 8 pp., 2 figs. Distributed only upon authorization 

 of Bureau of Ships. 



990. (NS 711-105). A Graphical Method for the Analysis of Nonlinear Systems 



Under Arbitrary Transient Conditions, by Erwin E. Bareiss and Sterling 

 C. Atchison. Mar 1957- 59 PP-^ 19 figs. 



991. (NS 715-102). Effects of Various Linkage Ratios on the Free-Stream 



Eydrodynamic Characteristics of an All-Movable Flapped Rudder, by 

 C.R. Olson. Sep 1955- 21)- pp., 12 figs. 



992. (NS 715-090). Turning and Maneuvering Tests of Model i^521 Representing 



the Ammunition Ship AE21 Class, by W.G. Surber, Jr. and S.C. Cover. 



Mar 1956. 18 pp., ^ figs. Distributed only upon authorization of Bureau of ships. 



993. 



1-72 



