Method and arrangement on a vessel

Marine propulsion – Screw propeller – Having means to control flow around propeller

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114 67A, B63H 118

Patent

active

050748130

ABSTRACT:
Method and arrangement for the reduction of the resistance to rotation of the propeller (3) of a ship (1) going in ice when the ice increases the resistance to rotation of the propeller to a level higher than when sailing in open water. When the resistance to rotation increases, gas is passed to the propeller (3), and the supply of gas is adjusted when the resistance to rotation is changed. The supply of gas may be continual, but as a rule it is used only for short periods in order to correct the speed of rotation of the propeller to the appropriate level.

REFERENCES:
patent: 1007583 (1911-10-01), Loetzer
patent: 3575526 (1971-04-01), Van Gunsteren
patent: 3924556 (1975-12-01), Wacker
patent: 4188906 (1980-02-01), Tachmindji et al.
patent: 4383829 (1983-05-01), Allen, Jr. et al.

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