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TOPIC: Original Dimensions for the Whitby 42 Rudder

Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2282

I have been lucky enough to be babysitting a Whitby 42 that belongs to my brother for the last 5 years. One project that I would like to tackle this winter is to try and improve the steering on the boat. I have heard that several people have enlarged their rudder. I do not know if the rudder has been modified on the boat. Could someone please tell me how I can find this out (dimensions of the original rudder) and also I would be interested in people's opinion about enlarging the rudder. Thank you.
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2283

  • rstrick
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I'm not sure of the exact deminsions,but if you check the gallery page on this site there are copies of the original diagrams, and you can compare them to the shape of your rudder. It's usually pretty obvious if the rudder has been modified.
We did ours back in 1995, while in Trinidad. It was one of the first projects we tackled and has been one that really improved the boat for us. We added 3-4 inches of length to the trailing edge at the bottom and tapered it up to the original at the top and added to the bottom to make it parallel to the bottom of the keel.
It has really improved the steering, especially at slow speed and in tight quarters.
Dee, Allegria 199
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2285

  • gtod25
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Send me an e-mail to whitby42 "at" gmail.com and I will send you a .pdf with rudder information. I think this .pdf is on the web site but I can't seem to locate it.

Gerry
Last Edit: 2 years 5 months ago by gtod25.
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2287

  • ConejoGrande
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Gerry, is this the file?

Rudder build notes from Doug Stephenson

If not, email it to me so I can post it.

Scott
Last Edit: 2 years 5 months ago by ConejoGrande.
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2288

  • ConejoGrande
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As always, a huge thank you to Gerry. Here is the file which, in addition to the measurements of the original rudders, includes a ton of information on rebuilding one as well.

Whitby 42 Rudder
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2289

Thank you everyone for responding my inquiry. I can't wait to look at the plans but I'm having difficulty opening the Whitby 42 Rudder link that was in the last post. A message appears that indicates that I am not authorized to open the file. Is there a trick that I am missing?
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2290

  • ConejoGrande
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My bad... Try it now.
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2291

Perfect - thank you!
I will let you know how I make out.
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Original Dimensions for the Whitby 42 Rudder 2 years 5 months ago #2294

  • snoozer
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Just a note on the Whitby rudder enlargement.
1. The internal structure was not always up to the extra stress that enlarging the rudder surface will create.
2. Enlarging the surface area may over-load some of the smaller autopilots found on older Whtibys.

Both of these happened to me with the New Hope.(306)
The larger rudder surface over powered the Pilot (Robertson), and I had to cut 2 inches off the trailing edge of the enlarged rudder.
Then the rudder structure failed four years later. I replaced the rudder with stainless plate, and after two more years trimmed another inch off the trailing edge. The rudder now makes the pilot happy and still is better than the old size.
The lesson is, Inches added to the bottom are better than just making the rudder longer.
And do not be surprised if the internal structure fails.
In Marathon, #306, New Hope
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