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Adam,
I’ve never heard of anyone fabricating an emergency
rudder for a cruising sailboat, but I do have one on
Silverheels. It’s the external rudder that’s part of my
Auto-Helm windvane made by Scanmar Marine, the same
outfit that makes the Monitor windvane (photos
attached). If I lost my primary steering system or
rudder, I could steer my boat with the Auto-Helm’s
rudder via a second set of cables I had made up for it,
which connect to a tiller-pilot (autopilot), or simply
as it is designed to do via the windvane. Of course,
one could also make a tiller for it.FYI, the old, traditional way to compensate for a
busted rudder is by dragging warps and/or any handy
objects off one quarter or the other, along with
varying the sail trim.Tor
Silverheels, P-424 #17
http://www.silverheels.us
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Have been researching the emergency rudder issue. If you haven’t already found this, the only way to go is a cassette rudder which is a structure that has a frame for the rudder to slide down into instead of trying to drop a rudder with pintles attached into gudgeons on the transom.
The reason for the cassette design is that boaters that tried to install a rudder with the pinties attached found it impossible to line up the pins with the gudgeons on a boat rolling around at sea and flopping the rudder side to side.
Google cassette rudder and you’re get lots of pictures and plans.
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Which reminds me… Scanmar Marine sells an emergency
rudder, online at
http://www.selfsteer.com/products/sos/index.php .Tor
Silverheels, P-424 #17
http://www.silverheels.us
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I found an article about building cassette rudders which gave some guidelines for calculating the size you need based on your existing rudder, position on the boat, etc.
My plans are for in the water surface area of the cassette rudder of 50-65% of the existing rudder and 1″ diameter pintles. I am also thinking of adding s small balanced area towards the bottom of the emergency rudder to make it easier to steer with a tiller.
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About 2/3 of a barn door.
Tor
Silverheels, P-424 #17
http://www.silverheels.us
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About 2/3 of a barn door.
Tor
Silverheels, P-424 #17
http://www.silverheels.us
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@Adam wrote:
What is the approximate size of the 424 rudder?
Adam
Will be at my boat tomorrow and measure it.
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Adam, give me a minute to get through a cup of coffee, and I’ll get the measurements for you………
Leading edge vertical 41″
Aft edge vertical 46 1/2″
Across the bottom including gudgeon 28″
Across the top horozontal 25″Ken
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Thank you ken.
This will give me a start. I am having trouble on materials to use. Do you use wood covered wih fiberglass for rudder and cassette box. Or use aluminum reinforcement. Another way to consider would be galvanized pipe and plywood and consider it “single use” because of rust.
Thanks Adam
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Adam, why not look at what is available in the boat for the use of an “EMERGENCY” rudder. Two teak cabin doors possibly screwed and bolted together with and added fiberglass leading edge. Two stainless steel ladder assemblies which could be dismantled to create pivot points off the transom, etc, etc. This is all of course for dire situations which may or may not happen.
Honestly, to build a spare rudder and carry it aboard just doesn’t make a lot of sense to me. I think Tor has the best set up for an emergency rudder and all it costs is money and by golly it will steer your boat! It “is” the kick-ass answer to an emergency rudder and I wish I had his set up!!!!!!
ken
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Ken you are right!
Tor’s setup is awesome and I too wish I had it!
My purpose for the emergency rudder is to satisfy requirements for the regata al sol race from Pensacola to Isla Mujeres, Mexico.
I was thinking something low tech and inexpensive way to satisfy the requirement.If I ever purchase a self steering system it will be like Tor’s for sure. I like the way he added a tiller auto pilot to the system, brilliant!
Adam
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