334 



HYDRODYNAMICS IN SHIP DESIGN 



Sec. 593 



^■0.15 



\0.\0 



?0.05 



0.00 



-0.8 



D = 160 mm (6.31 in) 

 P = 155 mm (6.10 in) 

 Pin = 0.969 



2 = 3 

 AeIAo = 0.42 



-o.a 



-Ql 



06 0.7 08 0.9 1,0 



Advonce Coefficient J 



Fig. 59. C Typical ChahactbrisTic Curves for a 

 Model Propeller, Derived from a Variable- 

 Pressure Water-Tunnel Test 



ogival sections and elUptical outlines. Data are 

 presented in SNAME, 1932, pp. 92, 102, 116. 



(3) HSVA model propeller 1705, used to self-propel the 



Hamburg Basin model of the M. S. &an Francisco; 

 SNAME, 1936, Fig. 5, on p. 203. Unfortunately, 

 no drawing of the model propeller is included in 

 this reference. 



(4) HSVA model propellers 1242 and 2003, having 



ogival-airfoil and double-symmetrical blade sec- 

 tions, respectively. Prototypes of these propellers 

 were carried by the port and starboard shafts of 

 the steamer Tannenberg, employed for special 

 trials by the Hamburg Model Basin in 1938 

 ["Ergebnisse Naturgrosser Schraubenversuche auf 

 Dampfer 'Tannenberg' (Results of Full-Soale 

 Propeller Tests on the Steamer Tannenberg)," 

 WRH, 15 Jun 1939, Vol. 20, No. 12. English 

 version in TMB Transl. 91, Jul 1941]. Figs. 1 and 

 2 of the reference are drawings of the ship pro- 

 pellers and Figs. 4 and 3 give the characteristic 

 curves for the open-water tests of the models. 



(5) SSPA model propeller P6 for a fishing boat; the 



blades have airfoil sections. 



D = 292.3 mm (11.55 in) 



P = 153.7 mm (6.05 in) Z = 2 (adjustable) 



P/D = 0.524 Ad/Ao = 0.144 



SSPA Rep 2, 1943, pp. 10-15, 30-32. 



(6) Six 3-bladed propellers, adjustable; SSPA models 



P49, P50, P51, P52, P55, and P82. SSPA Rep. 4, 

 1945, pp. 8-13, 32-33. 



(7) SSPA models P68, P69; SSPA Rep. 5, 1945, pp. 14-18 



(8) SSPA model of identical 3-bladed propellers at each 



end of a double-ended ferryboat. Blades have 

 double symmetrical sections. 



SSPA Rep. 7, 1947; summary, and some table and 

 figure legends in English. 

 (9) Fixed-pitch propeller, designed for and used on 

 U. S. Navy tug YTB 600; SNAME, 1948, Fig. 5, 

 p. 278. Four-bladed propeller with sections nearly 

 symmetrical. D = 9.167 ft, P = 8.00 ft, P/D = 

 0.872. Mean-width ratio is 0.246 and Ad/Ao = 

 0.525. Propeller is shown in Fig. 3 of the reference. 

 Values of Ct and Cq are in dimensional terms. 



(10) SSPA model propeller, with airfoil and ogival blade 



sections. 



D = 211.1 mm (8.31 in) Ad/Ao = 0.598 



P = 200 mm (7.87 in) 2 = 4 



P/D = 0.948 Rake = 12.8 deg 



SSPA Rep. 13, 1949, pp. 10-11. 



(11) Eight TMB model propellers, used to self -propel ten 



models of single-screw tankers; SNAME, 1948, 

 pp. 360-379. The principal dimensions and charac- 

 teristics of the full-scale propellers are given, 

 together with the open-water curves, embodying 

 dimensional values of Cy and Cq . Unfortunately, 

 no propeller numbers or drawings are included. 



(12) TMB model screw propeller 2225; SNAME, 1951, 



Fig. 12, p. 637 



(13) SSPA model propeller P156a for a coaster, with 



airfoil and ogival blade sections. 



D = 208 mm (8.19 in) Z = 3 



P = 114 mm (4.49 in) Ad/A,> = 0.44 



P/D = 0.55 Rake = 15 deg. 



SSPA Rep. 24, 1953, pp. 40-43; includes propeller 

 drawing. 



(14) SSPA model propeller P160 for a coaster, with 



airfoil and ogival blade sections. 



D = 260 mm (10.24 in) Z = 4 



P = 230 mm (9.06 in) Ap/Ao = 0.40 



P/D = 0.89 Rake = 15.2 deg. 



SSPA Rep. 24, 1953, pp. 40-43; includes propeller 

 drawing. 



(15) Characteristic curves derived from open-water tests 



of the several propellers used to drive the TMB 

 Series 60 models and several associated models are 

 given by J. B. Hadler, G. R. Stuntz, Jr., and 

 P. C. Pien [SNAME, 1954, pp. 124-134, 152-1561. 

 While this paper gives a drawing of only onp 

 propeller, TMB 3376, on page 124, drawings of 

 the others are on file at the David Taylor Model 

 Basin. 



(16) SSPA model propeUers P616, P617, P618, and P619. 



All propellers are 3-bladed, with developed-area 

 ratios of 0.45, tx/D ratios of 0.048, and rakes of 

 7.5 deg. The diameters and P/D ratios vary 

 considerably. SSPA Rep. 35, 1955, pp. 12-15. 



(17) Characteristic curves derived from open-water tests 



of the nine stock TMB propellers used to self- 

 propel the ten tugboat models described by C. D. 

 Roach [SNAME, 1954, Figs. 6(b) through 15(b), 



