These rudders, each approximately half the size of the traditional steering rudder, and linked to operate in unison, flank the driveshaft and fall within the perimeter of the propeller’s slipstream to direct prop wash and better provide the sideways force necessary to turn the boat in either direction. Or, at least as easy as an outboard or sterndrive.ĭockstar adds a pair of smaller rudders forward of the propeller. MasterCraft’s enticement to the latter crowd is Dockstar, a steering system enhancement the company claims will make docking and maneuvering an inboard in reverse as easy as parking a car. Most inboard consumers learn to adapt, but the quirk keeps countless others, who may benefit from an inboard’s superior wake potential, behind the wheel of a sterndrive. A direction determined solely by prop torque, the directional force created by the spinning propeller. There’s nothing forward of the prop to deflect prop wash (and no vectored thrust like you’d find on a sterndrive or outboard you can’t “steer” an inboard’s prop), so no matter which way the wheel is turned the boat backs effectively in only one direction. But shift into reverse and that rudder is effectively nullified. When moving forward, the propeller’s steady flow of water passes over the rudder aft to produce agile, spirited handling. Ski and wake-boat manufacturers have gone to great lengths preaching the merits of inboard power, but for all the positives the fact remains inboards have an Achilles heel - manueverability in reverse.
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