TRANSLATIONS 



239 • Saving of Power in Formation Flying (Leistungserspamis im Verbadsflug) , 

 by E. Schlichting. Bericht des Aerodynamisches Institutes der Tech- 

 nischen Hochschule Braunschweig, No. U2/6, I5 June 1042. Translated 

 by I. Pollin. Apr I95I. ^I PP-, 2k figs. 



2^+0. Formation Flying in Stepped -Up Formation (Verbandsflug mit Eohen- 



staff elung) , by H. Schlichting. Bericht des Aerodynamisches Insti- 

 tutes der Technischen Ilochschule Braunschweig, No. kk/j , 15 February 

 1q1;4. Translated by I. Pollin. Oct 1950. 25 pp., 9 figs. 



2i»-l. The Method of Singularities for the Determination of Forces and Moments 

 Acting on a Body iii Potential Flow (Singularitaetenverfahren zur 

 Ermittlung der Kraefte und Momente auf Koerper in Potential- 

 stroemungen) , by A. Betz Go"ttingen. Ingenieur-Archiv. 1952. 

 Translated by M. St.Denis. Rev. Ed. Jun I95I. 15 pp., 21 figs. 



2U2. Contribution to the Calculation of Turbulent Boundary Layers (Beitrag 

 zur Berechnung der Turbulenten Grenzschichten) , by J. Rotta. Report 

 issued by the Max-Planch-Institut fur Stromungsforchung in Gottingen; 

 July 1, 1950. Tra.nslated by E.N. Labouvie. Nov I95I. 2? pp., 10 figs, 



2i+5. The Present Status of Theoretical Research on Ship Propellers with 



Respect to its Technical Application (Der Stand der Forschung Uber 

 den Schiffspropeller Im Hinblick auf die Technische Berechnung), by 

 Dr. Ing. PI. Lerbs. Werft-Reederei-Eafen, Vol. 25, 15 February I9I+2, 

 pp. 57-62. Translated by E.N. Labouvie. Jan 1952. 21 pp., k figs. 



2kk . Resistance and Propulsion of Motorboats (Veerstand En Voortstuwing Van 

 Motorboten), by D. DeGroot. Publication No. 93 of the Model Basin in 

 Wagenlngen. Transleted by V.B. Eintertban. Jan I956. 59 pp., 16 figs. 



2^5- The Inf]-uence of the Boundary Layer on the Wave Resistance of a Ship 

 (Vliianle Pogranichiiogo Sloia na Volnovoe Soprotivlene Korabiia), 

 by V.M. Lavrentieff , Central Scientific Research Institute of the 

 Maritime Fleet, Reports of the Academy of Sciences of the U.S.S.R. 

 1951, Vol. LKXX, No. 6. Translated by Ralph D. Cooper. Apr 1952. 

 8 pp., 1 fig. 



2k6, Collected French Papers on the Stability of Route of Ships at Sea, 

 1949-1950, by Jean Dieudomie, Director, The Institute of Research 

 in Naval Construction, Paris. Translated by Capt . E.E. Saunders, 

 USN, and E.N. Labouvie, Ph.D. Jan 1955. 66 pp., Ik figs. 



21^7. 



IV-25 



