I designed a rudder for practice. This is supposed to be for a class 3 ship. The rules state it should be 3in^2. Could someone check my math and see if I did it right? I'm thinking the 3in^2 is for the face because if it was cubed that would be volume and very different. https://rcwarshipcombat.com/resources/class-3-rudder-v1.201/nt.