DLBA UNIVERSITY
Achievements with Advanced Craft
MARCH 24, 2018
By Donald L. Blount
Progress in the performance of advanced craft and the merits of various limit forms differ with respect to the technological maturity of each concept. Full-scale, calm water trial data of speed and power for known displacement transport efficiency is used to compare the optimum performance of several hull forms such as planning, round bilge, stepped, catamaran and SES.
Transport efficiency comparisons for a wide range of dimensionless speeds have been updated for trial results through the beginning of 1993. Trends that demonstrate increased transport efficiency are discussed when sufficient information is available to define resistance to weight ratios and overall propulsive efficiencies. Finally, data for useful load fraction, defines as the combination of payload and fuel weight relative to design full load displacement are presented for hard chine and SES craft.
References
1. Blount D.L. and Fox D.L. “Small Craft Power Prediction” Marine Technology, Vol 13, No. 1, Jan 1976.
2. Gawn, R.W. I. and Burrill, L.C. “The Effect of Cavitation on the Performance of a Series of 16 inch Model Propellers” Trans. INA Vol. 99, 1957.
3. Van Lemmeren, W.P., van Manen J.D. and Oosterveld M.W.C., “The Wageningen B-Screw Series,” Trans SNAME, Vol. 77, 1969.
4. Newton, R.N. and Rader, H.P. “performance Data of propellers for High-Speed Craft,” Trans. RINA, Vol. 108, 1961.
5. Hecker, R.C., Shields, C., and McDonald, N. “Experimental Performance of a Controllable-Pitch Supercavitating Propeller,” NSRDC Report 1636, Aug. 1967.
6. Blount D.L. and Carinder, J.E. “Propeller Characteristic Format for Use with High Speed Craft,” NAVESECNORDIV Report 6660-18 July, 1975.
7. Blount, D.L. and Hankley, D.W., “Full-Scale Trials and Analyses of High-Performance Planing Craft Data” Trans. SNAME, Vol. 84, 1976
8. Blount, D.L., Stuntz, G.R., Jr., Gregory D.L. and Frome, M.J. “Correlation of Full-Scale Trials and Model Tests for a Small Planing Boat,” Trans. RINA, 1968
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