Ships propulsion

Details Ships propulsion Ships propulsion

1987-10-15

1989-03-28

Peters, Jr., Joseph F.

Marine propulsion

Screw propeller

Having means to control flow around propeller

114 56, B63H 514

Patent

active

048159956

ABSTRACT:
A ship's propeller is mounted so its blades will rotate closer to the shell plating of the adjacent hull, than is generally considered advantageous. A recess is formed inside the shell plating in the region of the propeller, the recess having a depth locating its inward wall at a distance from the tips of the rotating propeller blades corresponding to about 25% of the propeller diameter. The recess can be provided with a number of spaced-apart, transverse bars having a height less than the maximum depth of the recess.

REFERENCES:
patent: 867654 (1907-10-01), Golden
patent: 1401963 (1922-01-01), Criqui
patent: 2581625 (1952-01-01), Brady
patent: 2929586 (1960-03-01), Hurd, Jr. et al.
patent: 4509925 (1985-04-01), Wuhrer

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