Sec. 59.6 



PROPULSION DEVICE PERFORMANCE 



335 



pp. 601-619]. The Cq and Ct plots in these figures 

 embody dimensional data. This paper gives no 

 drawings of any of the model propellers but all 

 the TMB model numbers are included, and the 

 drawings are on file at the David Taylor Model 

 Basin. 



59.4 Performance Data from Screw-Propeller 

 Design Charts. The systematic data derived 

 from the open-water tests of a multitude of series 

 propellers, made in model basins all over the 

 world, are published in the form of charts suitable 

 for use in ship and propeller design. Thirteen 

 kinds of screw-propeller-series charts are listed 

 and described in Sec. 70.4. Comments on and 

 comparisons of these charts are to be found in 

 Sec. 70.5, while Sec. 70.6 describes and illustrates 

 the procedure to be followed in making perform- 

 ance predictions from three of these chart types. 



Other examples illustrating the manner in 

 which screw-propeller performance is predicted 

 from published propeller charts are found in 

 Sees. 66.27 and 77.35, and in a paper "Propeller 

 Coefficients and the Powering of Ships," by F. M. 

 Lewis [SNAME, 1951, pp. 612-620]. 



The calculation of screw-propeller performance, 

 by a method derived from analytic considerations, 

 is covered by J. G. Hill in Appendix 2 of his 1949 

 SNAME paper, pages 161 and 162. 



59.5 Performance Data on Paddlewheels and 

 Stemwheels. In 1916 E. M. Bragg published a 

 paper on "Feathering Paddle-Wheels" [SNAME, 

 1916, pp. 175-180, Pis. 90-98] in which he gave 

 several sets of charts, intended to provide the 

 designer with the same sort of information from 

 systematic series as was included on the screw- 

 propeller charts of that day. Unfortunately, these 

 data are not readily applied by one who needs to 

 design a modern paddle wheel. 



To meet this need H. Volpich and I. C. Bridge 

 undertook, in the early 1950's, to make systematic 

 tests on a new series of models and to present the 

 designer with tabulated and graphic information 

 readily adaptable to his problems. The first 

 installment of these data appeared in the paper 

 "Paddle Wheels; Part I, Preliminary Model 

 Experiments" [lESS, 1954-1955, Vol. 98, Part V, 

 pp. 327-372], It is understood that at the time of 

 writing (1955) this systematic test program is 

 still underway and that Part II of the report will 

 appear in 1956. The data in this series of papers, 

 taken with those of F. Gebers in reference (31) of 

 Sec. 59.6, should go far toward filhng, for the 

 paddlewheel designer, the need which has been 



met by the availability of many design charts 

 for the screw-propeller designer. 



59.6 Bibliography on Paddlewheels. There 

 appears to be no lengthy list of references ap- 

 pended to any of the better-known published 

 papers and books on paddlewheel propulsion. The 

 list given hereunder is by no means complete 

 but it may serve the reader as a source of back- 

 ground information, as well as a source of experi- 

 mental data and of information useful in design: 



(1) Napier, J. R., "On the Effects of Superheated Steam 



and Oscillating Paddles on the Speed and Economy 

 of Steamers," Trans. Inst. Engrs. Scot., 1863- 

 1864, Vol. VII, pp. 86-102, Pis. V and VI. The 

 "oscillating" paddles mentioned in the title of this 

 paper are the feathering paddles of today. The 

 table on p. 90 gives the principal paddlewheel and 

 blade data for the steamers Concordia and Berlin. 

 These vessels originally had radial wheels but were 

 later altered to carry feathering wheels of smaller 

 diameter and higher rate of rotation. On these 

 feathering paddlewheels the blade spacing was 

 only slightly greater than the blade width, the 

 blade faces were flat, and the blades were appar- 

 ently made of wood rather than iron. 



(2) Rankine, J. W. M., "Shipbuilding: Theoretical and 



Practical," 1866, pp. 248, 251. Rankine refers to 

 the preceding paper by J. R. Napier. 



(3) Riehn, W., "tjber die Wirkungsweise der Schaufel- 



rader und der Schrauben bei Dampfschiffen (On 

 the Operation of Paddlewheels and Propellers in 

 Steamers)," Zeit. des Ver. Deutsch. Ing., 1884, 

 Nos. 18-22 



(4) Pollard, J., and Dudebout, A., "Theorie du Navire 



(Theory of the Ship)," 1894, Vol. IV, pp. 179-193 



(5) Lovell, L. N., "American Sound and River Steam- 



boats," Cassier's Magazine, Jul 1897, pp. 459, 482 



(6) Durand, W. F., RPS, 1903, pp. 164-169, 198-203 



(7) Paddle steamer C. W. Morse, Marine Engineering, 



Jun 1904, p. 279 ff 



(8) Kaemmerer, W., "Raddampfer ftir die Anatolische 



Eisenbahn-Gesellschaft, erbaut von den Howaldts- 

 werken in Kiel (Paddlewheel Steamer for the 

 Anatolian Railways, built by the Howaldt Works, 

 Kiel)," Zeit. des Ver. Deutsch. Ing., 12 Nov 1904, 

 pp. 1725-1729. Figs. 9 and 10 on p. 1726 show the 

 arrangement of a 4.5-meter (14.75-ft) outside 

 diameter 8-bladed paddlewheel with the eccentric 

 for the feathering mechanism centered ahead of 

 and slightly helow the wheel center. 



(9) Hart, M., "Note sur le Changement des Roues des 



Paquebots Le Nord et la Pas-de-Calais (Note on 

 the Alterations to the Paddlewheels of the Channel 

 Steamers Le Nord and Pas-de-Calais)," ATMA, 

 1906, Vol. 17, pp. 169-186 and Pis. I through VIII 



(10) Ward, C, "Shallow-Draught River Steamers," 



SNAME, 1909, Vol. 17, pp. 87-88 



(11) Feathering paddlewheel, Schiffbau, 27 Dec 1911, pp. 



210-211 



(12) Teubert, O., "Binnensohiffahrt (Inland-Waters Ship 



