24 Jun
2013
24 Jun
'13
6:02 p.m.
But these rear rudders were ubiquitous even on sailing ships: https://en.wikipedia.org/wiki/Rudder Here's something I just learned from Wikipedia: "Rudder post and mast placement defines the difference between a ketch and a yawl, as these two-masted vessels are similar. Yawls are defined as having the mizzen mast abaft (i.e. "aft of") the rudder post; ketches are defined as having the mizzen mast forward of the rudder post." At 04:13 PM 6/24/2013, Fred lunnon wrote:
On a small motor vessel driven by a single screw propeller, a considerable amount of steering force is generated by the action of the propeller stream on the rudder, which therefore has to be in line with and adjacent to the propeller.