Just heads up to some of the Newbies that may not be aware of the significance of using a S.S. wire brush when cleaning anodes & bearing surfaces as Karl, has described above

Here's a site that sells anodes at a fair price that we need for our s

www.boatzincs.com/marinette-bar.html

Norm,

Big Live On

You're welcome. Glad to save someone money--especially me! Make the stainless leading edge strips go from the front edge of the rudder to about where the post starts--about a inch and a half.

Jeff

No. The rudders on Marinettes are well suited to maneuvering. Larger ones just making steering more difficult.

Jeff

PS: There's a lot of engineering involved in rudder design!

There are two obvious improvements one could make to the stock M rudders:

First, use an airfoil shape rather than a flat plate. At M speeds that would mean that the widest part, 1/3 back from the leading edge, would need to be about 15% of the chord. Less balance (area forward of the stock) would be required.

Second, fill the space at the top of the rudder, going as close to the hull as practical. This will improve both efficiency and turning force.

The factory knew both of these things, and apparently decided that the improvement in performance was not worth the cost.

Doug,

I hope you are beaching your Bertram not the Marinette. When I had a fiberglass boat, I used to beach it often but since the sandy or muddy bottom will rub the coating off the bottom, I will not beach my Marinette ... way to much work to clean and recoat bottom.

Max