Yo fellow forumites,
I got an OK from John Welsford for fitting twin rudders to my SCAMP because he also agreed to my use of my existing 4 HP outboard on an inboard motor well. The inboard motor well prohibits the use of a single, centered on the transom, rudder. Could have gone with a single offset rudder but we both seemed to like the twin rudder set up better. I think I have maxed out my question allotment to Mr. Welsford with all my many changes to the SCAMP plans so I am asking the forum for this particular answer.
Here's the two-part question:
If you are replacing a single rudder with two twin rudders, how much smaller than the single rudder can you make each twin rudder? I was thinking about 80% of the single rudder but I'd like to hear from the forum before shaping those little babies. I just finished shaping the offset centerboard for the SCAMP so I know how much work is involved in shaping a NACA foil so I'd like to get them right the first time.
Also in the drawing I commissioned from Mr. Welsford, he has the rudders tilted 5° out from center. Would it be a crime to just keep them parallel to each other in order to make it easier to synchronize the tillers with each other?
Thanks in advance for your answers,