Hydrodynamic Towing Evaluation of SSBN-623 and SSBN-636,
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SHIP HYDROMECHANICS D EPT
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An experimental evaluation was conducted to investigate the surface towing characteristics of the SSBN-623 and SSBN-636 submarines. A 119.394-scale model was towed in the David Taylor Model Basin deep water towing basin, varying towpoint location, metacentric height GM, trim and several stern appendage modifications. SSBN-623 was towed in a stable configuration at speeds up to 10 kn full-scale with the sternplanes set to 25 deg trailing edge up, at trim between 4.5 ft 1.37 m and 6.0 ft 1.83 m down by the stern, with a GM between 0.97 ft 0.296 m and 1.90 ft 0.579 m, and with a lower-rudder plate appendage attached. A stable towing configuration can be obtained for SSBN-636 by replacing the missing 4-ft 1.22 m section of the lower rudder and making the same changes as listed for SSBN-623. The use of sternplane scoops stabilized both SSBN-623 and SSBN-636, but with a non-acceptable increase in towline tension. Hydrodynamic performance, Towing characteristics, Submarine towing stability.
- Submarine Engineering
- Surface Transportation and Equipment