Rudder for a Cascade 36

[patrickbwells]

I need a rudder for a Cascade 36. It looks like it is a fairly standard spade rudder shape and I am wondering if there is any reason why I couldn't replace it with a rudder from a different model boat. Maybe someone knows where I could get an acceptable replacement in the Puget Sound/Olympia area. Thanks.


Not my Cascade

[sailingdog]

As long as the foil is about the same area and the rudder stock is the same diameter, I don't see any reason you can't use a rudder off another boat.

Rudder balance might be an issue, depending on whether the old one and new one have the same balance point..

[patrickbwells]

Okay,
So Ive gotten a rudder from a Hunter 40 that has similiar proportions and area as the original.. My plan is to have teflon bushings (RED) and a collar made, then I should be good to go. My only concern is the that too much pressure could be exerted on the top of the GRP rudder shaft (GREEN ARROWS). At first I considered using a single teflon tube the entire length of the shaft, but it is a little out of my price range. It seems to me that the only solution is to get one or more bushings towards the center of the shaft (BLUE ARROWS). The only problem is that I cannot for the life of me think of how to get them to stay in place. Has anyone got any ideas?

Yes I know, I'm no artist.

[sailingdog]

How thick are the bearings... .what is the difference in the diameter of the shaft compared to the hole? Also, do you know if the center portion of the tube is supported well enough and of sturdy enough construction to take forces from a bearing located there? In many boats, the most significant reinforcement of the rudder stock sleeve is at the top and bottom, so the bearings are usually located there.

[patrickbwells]

Sailingdog,
The rudder stock is 2 4/5 inches in diameter and the rudder stock port has a 4" inside diameter. The Rudder stock is about a foot shorter than the rudder stock port so I have have two options: Have another section of bar of the same diameter welded onto the rudder stock, or have a sleeve of a larger diameter welded over the entire stock. What are your thoughts?

[patrickbwells]

Sailingdog,
The rudder stock is 2 4/5 inches in diameter and the rudder stock port has a 4" inside diameter. The Rudder stock is about a foot shorter than the rudder stock port so I have have two options: Have another section of bar of the same diameter welded onto the rudder stock, or have a sleeve of a larger diameter welded over the entire stock. What are your thoughts?

[sailingdog]

I'd go with the sleeve of a larger diameter rather than the bar.

[yotphix]

If you do sleeve it, consider that you are creating what I believe an engineer (which I am NOT) would call a stress riser at exactly the point where the strain is highest. I really couldn't say whether that is a problem or not but it is something to consider.

[Maxo]

Hi Patrick

Any luck with the rudder. Thats my boat Nolwandle being lifted out earlier this year. Can you give us some more info on your Cascade. Good to find another owner.

Regards

Max

[Giulietta]

I have a rudder for you!!

Mine is for sale!! Its CF with lightweight alluminium shaft...that rudder guaranteed to make you go faster