What is the maximum effective angle of deflection for a plane’s control surfaces? As a naval architect I know what it is for a vessel. But, since water is about 800 times denser than air my concepts may be way off.
A boat’s or ship’s rudder never exceeds a maximum deflection of 35 degrees. Beyond that it acts like a brake rather than a steering device. At that point it loses a smooth flow of water on each side, with the stern side living in pure turbulence. Actually, the average designed deflection is closer to 32 degrees. It all depends on the rudder and how it is mounted.
A boat’s or ship’s rudder never exceeds a maximum deflection of 35 degrees. Beyond that it acts like a brake rather than a steering device. At that point it loses a smooth flow of water on each side, with the stern side living in pure turbulence. Actually, the average designed deflection is closer to 32 degrees. It all depends on the rudder and how it is mounted.