674 



HYDRODYNAMICS IN SHIP DESIGN 



Sec. 72.17 



Towboats — Stern-Wheel and Tunnel Propeller 

 Tj^pes Compared," SNAME, 1925, pp. 63-66 and 

 Pis. 44 through 60; also pp. 83-90 



(15) Foerster, E., and Stapcl, G., "Der Dreischrauben- 



schlepper Direktor Schiiiter (The Triple-Screw Tug 

 Direclor Schluler)," WRH, 22 Feb 1929, pp. 59-61. 

 Shows a tug for inland waters with three screws 

 abreast in three tunnels. 



(16) Hinz, M., and Lang, H., "Der Dreischrauben-Motor- 



schlepper Amsterdam (The Triple-Screw Motor Tug 

 Amslerdam)," WRH, 7 Feb 1930, pp. 43-48. Shows 

 body plan and stern lines of a shallow-water tug 

 having three screws abreast in three tunnels. 



(17) Brodie, J. S., "Modern River Towboats," SNAME, 



1936, pp. 350-388 



(18) Dawson, A. J., "Power of Shallow-Draft River 



Towboats," SNAME, 1937, pp. 145-159 



(19) Tunnel-stern towboat St. Louis Socony, MESR, Apr 



1939, p. 172. A profile of this craft shows a 10-deg 

 slope to the tunnel roof forward of the propeller 

 and an I1.2-deg slope in the after portion. The 

 tunnel roof embodies sharp transverse knuckles 

 with no rounding. 



(20) Edwards, V. B., and Cole, F. C, "Water Transporta- 



tion on Inland Rivers," SNAME, HT, 1943, pp. 

 400-422, esp. p. 412 



(21) "Standardized River Towboats," AM, Oct 1948, 



pp. 36-39. This article shows stern and bow 

 photographs and an outboard profile on a vessel 

 carrying 4 flanking rudders, 2 steering rudders, a 

 single-tunnel stern, and a single propeller inside a 

 Kort nozzle. 



(22) Dawson, A. J., "The Development and Economic 



Potential of Inland Waterways Transportation," 

 First Pan-Amer. Eng. Conf., Rio de Janeiro, 15-24 

 Jul 1949, esp. pp. 5-21 



(23) Alaskan river boat. Rudder, Aug 1951, p. 41. This 



vessel has a length of 64.5 ft, a beam of 17.33 ft, 

 and a draft of only 1.0 ft, with a tunnel stern. 

 With a brake power of 165 horses it is designed to 

 make 11 kt. 



(24) Mitchell, A. R., "Shallow Draught Ships," INA, 



Jul 1952, pp. 142-153 



(25) Mitchell, A. R., "Tunnel Type Vessels," lESS, 



1952-1953, Vol. 96, pp. 125-188. This is a compre- 

 hensive, instructive, and informative paper, well 

 supplied with model- and ship-test data and 

 generously illustrated with drawings and photo- 



(26) Jastram, H., "Ein Neuer Schiffstyp mit Grossraum- 

 tunnel (A New Ship Type with an Enlarged 

 Tunnel)," STG, 1954, Vol. 48, pp. 154-164. 



