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 Catalina 25 Specific Forum
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iwillnotsubmit
1st Mate

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64 Posts
Initially Posted - 10/06/2011 :  13:47:43  Show Profile
I am building a balanced rudder to replace the standard rudder on my Cat 25. In the 'Technical Tips', there is a drawing of a balanced rudder including dimensions. I have been trying to use these dimensions to lay out a profile for a new balanced rudder, but have found discrepancies. Perhaps I am at fault for making assumptions, but it appears that the overall width does not equal the sum of the listed width dimensions. If there is anyone out there who has built a balanced rudder, any input would be appreciated. I am mostly concerned with the width dimensions as the height figures seem to be correct.
1980 Catalina 25 TR, FK, Traditional. Sailing on the Mississippi River, Portage Des Souix, MO.
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Stinkpotter
Master Marine Consultant

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Djibouti
9013 Posts
Response Posted - 10/06/2011 :  14:23:39  Show Profile
I got curious, and I <i>might</i> see what you mean... Going R-L, 3" + X" + 2" + 12" + 1.5" = 20.5".

X is the distance the 2" step is from the vertical off the inside corner of the 3" step--the amount the 9.5" segment slants to the left--which is not specified (but would seem to work out to 2").

<b>EDIT:</b> However, the 5.5" figure would indicate just a .5" slant. So there seems to be 1.5" missing. Hmmmmmmm...
Edited by - Stinkpotter on 10/06/2011 14:29:06
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WesAllen
Navigator

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USA
222 Posts
Response Posted - 10/06/2011 :  18:38:13  Show Profile
I built one from those plans. I changed the angle to make it come out to the dimensions on top but can tell you that that is not the cure. The dimension that is left over needs to be on the front of the rudder for the tiller handle to rest upon. I am going to make a change to my rudder this winter. I also used laminated white oak for the core. It is heavier but in my opinion stronger. I then used West System with 3 layers of cloth then faired with West System fairing filler. Looked pretty good but does take some time. Other than the tiller handle rest it works very good and turns a LOT EASIER than the old rudder. If you would like any more detail or picture of finished product to show what I mean about the tiller handle rest just email me. wes dot newcast at frontier dot com.
Wes
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.