Sec. 77.41 



PRELIMINARY DESIGN OF A MOTORBOAT 



SOf) 



when planing, and possibly also on the assumption 

 that the surfaces of any type of planing craft 

 would always be smooth. It is now found far 

 preferable, and far more accurate, to expand the 

 observed data to full scale in the same manner 

 as for a large, displacement-type vessel [Peters, 

 S. A., SNAME, 1950, p. 682]. 



"Furthermore, there is need for the development of 

 equipment and techniques for self-propelling models of 

 planing craft, if guesswork is to be eliminated from 

 estimating engine power requirements, and maneuvering 

 characteristics" [Curry, J. F., SNAME, 1950, p. 688]. 



77.41 Partial Bibliography on Motorboats. 



Sec. 53.8 gives a partial list of references on planing 

 surfaces, dynamic lift, and planing craft. The 

 emphasis here is on the analytical and empirical 

 aspects of predictmg performance rather than 

 on the practical aspects of design. 



A few references from Sec. 53.8 are repeated 

 here, but for the most part the items listed in the 

 present section contain design notes and informa- 

 tion of direct practical use. Furthermore, the 

 references apply to displacement craft and to 

 round-bottom motorboats of the semi-planing 

 type, as well as to full-planing boats of many 

 kinds. 



(1) Crane, C. H., "High Speed Gasoline Launches," 



SNAME, 1904, Vol. 12, pp. 321-325. PL 94 of this 

 paper gives speed-rpm, speed-sUp, speed-power, 

 and other curves of the launch Vingt-et-Un II, 

 designed by Crane. See also Yachting, Jan 1952, 

 p. 62. 



(2) Crane, C. H., "Problems in Connection with High- 



Speed Launches," SNAME, 1905, pp. 365-373 and 

 Pis. 190-197. The first three of these plates give 

 midsection shapes, outboard profiles, waterlines, 

 and deck plans of a number of small torpedoboats 

 and fast launches of that time. 



(3) Durand, W. F., "Motor Boats; A Thoroughly 



Scientific Discussion of their Design, Construction, 

 and Operation," International Marine Engineering, 

 London and New York, 1907, L. C. No. VM 341. D9 



(4) Luders, A. E., Sr., "Model Experiments and Speed 



Trials of 60-ft Motor Cruiser Kalhmar II," 



SNAME, 1913, Vol. 21, pp. 177-180 and Pis. 

 110-112 



(5) Gamon, T. A., "Model Experiments on Express 



Cruisers of Deadrise Type; For High Speed-Length 

 Ratio Deadrise Tj^pe Proves Superior to Round 

 BUge Model — Resistance of Appendages Investi- 

 gated," Inter. Mar. Eng'g., Aug 1918, pp. 473-476 



(6) Smith, R. Munro, "The Design and Construction of 



Small Craft," pubKshed by The Technical Section, 

 Association of Engineer and Shipbuilding Draughts- 

 men, 96, St. George's Square, Westminster, 

 London, 1924. A considerable number of reproduc- 

 tions of this book have been distributed in the 

 United States. 



(7) Nicolson, D., "Design and Construction of High- 



Speed Motor Boats," INA, 1927, Vol. LXIX, pp. 

 121-143 and Pis. X and XI 



(8) Richardson, H. C, "Aircraft Float Design," Ronald 



Press, New York, 1928 



(9) McKenzie, Ian L., "The Powering of High-Speed 



Motor Yachts," SBSR, 16 May 1935, pp. 554-557 



(10) Nicolson, D., "High-Speed Motor Craft," NECI, 



1937-1938, Vol. LIV, pp. 98-118 and Pis. I and II; 

 also pp. D25-D32; abstracted in SBSR, 13 Jan 

 1938, pp. 39-40. This paper is devoted to a descrip- 

 tion of the design and construction of ultra-high- 

 speed motorboats having lengths of from 22 to 75 

 ft and Taylor quotients 7', of from 6.97 to 3.94. 

 The single graph of power-weight ratio on a base 

 of speed in kt begins at 35 horses per pound and 

 35 kt and extends up to over 150 kt. 



(11) Hadeler, W., "Motortorpedoboote-Schnellboote (Mo- 



tor Torpedoboats-High-Speed Boats)," Zeit. d. 

 Ver. Deutsch. Ing., 12 Aug 1939, pp. ^17-924. An 

 English version of this paper is given in TMB 

 Transl. 88, Jan 1940. 



(12) Miller, R. T., Johnson, V. D., and Towne, S. R., "The 



Design of a High-Speed Torpedo Boat," Thesis, 

 Webb Inst. Nav. Arch., New York, Apr 1940 



(13) Skene, N. L., "Elements of Yacht Design," New 



York, 1944. While much of this book is devoted to 

 the design of sailing yachts, there is a considerable 

 amount of information relating directly to the 

 design of motorboats and small powered craft. 

 This is especially true of Chap. XV on Resistance, 

 pp. 181-209, Chap. XVI on The Hydroplane, pp. 

 210-223, and Chap. XVII on Screw Propellers, 

 pp. 224-240. 



(14) Lord, L., "Elementary Considerations of Planing Hull 



Design," SNAME, Phila. Sect., 18 Oct 1946 



(15) Lord, L., "Naval Architecture of Planing Hulls," 



Cornell Maritime Press, New York, 1946 



(16) Guins, G. A., "The Design of Pleasure Planing Craft 



from Model Studies," SNAME, Pac. Northwest 

 Sect., 13 Sep 1947; abstracted in SNAME Mem- 

 ber's Bull., Jan 1948, p. 18. Author found by tests 

 on small models that the best value of the ratio 

 [(average waterhne length) /(average waterline 

 beam)[ is 2.63 for work in rough water. Range of 

 boat sizes is not given. Best rise-of-floor angle "for 

 spray deflection and soft riding" found to be 38.5 

 deg at FP and 21 deg at 0.3L from FP. Minimum 

 rise-of-floor angle for satisfactory longitudinal sta- 

 bifity is 7 deg. 



(17) Baier, L. A., "Power-Length-Speed," AM, New York, 



May 1948, pp. 34-35. Covers relatively slow-speed 

 work craft of lengths from 40 to 100 ft, speeds of 

 9 to 12 kt, weight displacement 50 to 300 t. 



(18) Thiel, P., Jr., Johnson, R. W., and Ward, L. W., "The 



Resistance and Wake of Nine Double-Chine 

 SimpHfied Hull Forms," Thesis, Dept. Nav. Arch, 

 and Mar. Eng'g., Univ. Mich., Ann Arbor, May 

 1948. The models forming the subject of this thesis 

 have certain characteristics of motorboats. 



(19) Peters, S. A., "Development of the Motor Torpedo 



Boat," SNAME, Ches. Sect., 3 Nov 1948. Ab- 

 stracted in SNAME Member's Bull., Jan 1949, p. 

 21. 



