I'd like to revisit the thistle (schilling or fishtail rudder). Looking at some of the old threads a lot of the links don't work any more.
Seems like quite a few folks have modified theres with great success for low speed handling.
I've got Boat Mechanical Systems Handbook, by Dave Geer on order, which has been mentioned several times as a good reference.
I like the idea of a bolt on addition, easy to install and remove if necessary.
Right now, I'm thinking of a two section rudder mod, one for the nose and one for the tail.
What I don't know is the dimensions that would work, but reading from others I'm guessing the following: Hopefully Dave's book will give some guidance.
X = 3 in
Y = 2 in.
Z = 3 or so, to fit shaft
As for the tail design, some leave it open on the end and some box it in. Why not a trailing diamond or curved shape, like in C and D below. The reasoning is to reduce turbulence in cruise, and give "some" effect in reverse, which would be better than a flat or open end.
Also, I'd figure out how to add a top and bottom plate.
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Thoughts?
Seems like quite a few folks have modified theres with great success for low speed handling.
I've got Boat Mechanical Systems Handbook, by Dave Geer on order, which has been mentioned several times as a good reference.
I like the idea of a bolt on addition, easy to install and remove if necessary.
Right now, I'm thinking of a two section rudder mod, one for the nose and one for the tail.
What I don't know is the dimensions that would work, but reading from others I'm guessing the following: Hopefully Dave's book will give some guidance.
X = 3 in
Y = 2 in.
Z = 3 or so, to fit shaft
As for the tail design, some leave it open on the end and some box it in. Why not a trailing diamond or curved shape, like in C and D below. The reasoning is to reduce turbulence in cruise, and give "some" effect in reverse, which would be better than a flat or open end.
Also, I'd figure out how to add a top and bottom plate.
Thoughts?