Fully Automatic and Proportional Fin Actuation, for maximum performance with minimum power and fin drag. Fin angle automatically reduces at higher speeds. Hydraulic operation ensures immediate and accurate fin positioning, without delay caused by compressibility associated with pneumatic systems. System functions on readily available 10W-40 multigrade oil, and is self bleeding. Fins are efficient NACA airfoil shapes, producing maximum lift with minimum drag, and avoid stalling, shuddering, and cavitation associated with plate or flow-thru type fins.
Tough fins resist damage from underwater objects, but yield to severe impacts.
Rugged actuators will power large fins when required, thus avoiding the complications and inefficiencies of multiple pairs. Automatic hydraulic centering, with backup manual cantering and locking. Double seawater shaft seals are mounted in a stainless steel housing. Full array of optional accessories to customize the system and facilitate installation.