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Rules of Thumb

 

Rules of Thumb

Rudder

http://www.marinesurveyorschool.org/pages/rudders.htm

Control Types: direct linkage: rack and pinion and worm gear, chain and cable using a quadrant, or radial-drive, enclosed cable, and hydraulic.

Should go over 35 degrees, and no more.

Rudder area = LWL x draft x 0.05   Seeker: 70*5.5*.05=19.25   Actual is 22.