Automatic control for trim tabs

Ships – Hull or hull adjunct employing fluid dynamic forces to... – Movably mounted hull portion or hull adjunct

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Details

440 1, B63B 122

Patent

active

054740126

ABSTRACT:
Adjustment is made of the position of a marine transportation system including a boat having a drive, a trimmable port tab and a trimmable starboard tab. The operation of the marine transportation system is monitored to provide an output distinguishing boat operation in an on-plane condition and boat operation in an off-plane condition, to provide an output distinguishing boat travel in a straight forward condition and boat travel in a turning condition and to provide an output distinguishing boat operation in a first heel condition in which the boat tilts to port and boat operation in a second heel condition in which the boat tilts to starboard. The port and starboard tabs are positioned at desired positions in response to the outputs. According to the embodiment, a heel adjustment operation of the boat is carried out during boat operation in an on-plane straight forward travel condition, only.

REFERENCES:
patent: 3468282 (1969-09-01), Wintercom
patent: 3834345 (1974-09-01), Hager et al.
patent: 4318699 (1982-03-01), Wenstadt et al.
patent: 4565528 (1986-01-01), Nakase
patent: 4657513 (1987-04-01), Baker
patent: 4718872 (1988-01-01), Olson et al.
patent: 5169348 (1992-12-01), Ogiwara et al.
patent: 5263432 (1993-11-01), Davis
patent: 5352137 (1994-10-01), Iwai et al.

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