deep rudder wanted |
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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Posted: 22 May 2019 at 10:38am |
Here is a pic of the deep rudder on the RudderCraft website.
https://store.ruddercraft.com/index.php?route=product/product&path=181_151&product_id=780 RudderCraft does not have a template for the original/standard rudder. If anyone wants to part with their standard rudder, let me know. john |
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Comet
Crew Joined: 21 August 2018 Status: Offline Points: 25 |
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I'm interested in the longer rudder, too. So any pix or details much appreciated.
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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Bill do you have any pics of that new rudder? It would be interesting to see them.
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Winner
Commodore Joined: 07 September 2011 Status: Offline Points: 222 |
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48" would be the long rudder. Mine is 47.5" at the trailing edge and 47" at the leading edge.
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Chris
Eclipse #240 Thunder Bay, ON |
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WJRyan
Commodore Joined: 12 February 2008 Location: Louisville, KY Status: Offline Points: 230 |
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My notes are from the leading edge and the longer rudder is built from the Farr drawings, the RudderCraft folks obtained original ones.
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Bill Ryan,
Room4Crew, #155 |
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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The Bruce Farr designed longer rudder is 47.6 inches on the trailing edge. As I recall the original short rudder was 4.5 inches shorter.. measured on the trailing edge.
Edited by Bill Layton - 20 May 2019 at 10:55am |
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WJRyan
Commodore Joined: 12 February 2008 Location: Louisville, KY Status: Offline Points: 230 |
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Hi John, I'm traveling this week and will measure when I get home but in my rough notes I have the standard rudder as 43 5/8" and the longer rudder as 48 1/8". - bill
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Bill Ryan,
Room4Crew, #155 |
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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Hello, I called the rudder shop to confirm they were making a standard (not deep) rudder. He said it their layout measures 48".
Can you confirm that is correct? thx, john |
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WJRyan
Commodore Joined: 12 February 2008 Location: Louisville, KY Status: Offline Points: 230 |
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If you are having to "pull" the tiller and you hear a scraping sound the odds are pretty good it is bent. I have one of those! When we dropped it the local experts shared others experiences with trying to straighten a post and the recommendation was to trim the top trailing edge instead and to leave the post alone. I have pictures of the repair and glass work done before I decided to get a new rudder instead, let me know and I will share. Sorry for the hit, I know how scary it was for me! - bill
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Bill Ryan,
Room4Crew, #155 |
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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Some bent shafts can be straightened and some can't. You won't know until you remove it and have some shop look at it. Epoxy and fabric upgrades are a good idea particularly when manufacturing a rudder using the standard method of cored fiberglass.
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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I wish I wasn't reading this post but I grounded the rudder on something hard yesterday. When she came off it felt like the the rudder top is binding firmly on the hull especially as the tiller comes through center.
I assume that is bent rudder post? I was going to haul to inspect but I suppose I can just reach under the water and feel if the rudder top is in contact with the hull. Anyone have a spare rudder ... ? The construction materials listed for the new rudder have epoxy upgrade and fabric upgrade. Are either of these important? Thanks in advance as always, john |
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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That looks great Bill, thanks for sharing that!
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khardy
Commodore Joined: 22 June 2004 Location: United States Status: Offline Points: 132 |
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also keep your crew on the rail until after you round the mark. Crew tends to get off the rail in preparation for kite hoisting. In heavy air its much better to keep the entire crew on the rail until you are turned down even though your kite may not get up as quickly.
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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The longer rudder is only helpful in really big seas. Don't get caught with too much vang on as that will keep the main powered. And be sure you let the jib out lots before you start easing the main. Both have to be eased off big time in those winds. I used to use the large rudder but I went back to the original rudder because it has much better feel. And it feels feather light. Whereas the longer rudder feel heavy, like an old chevy with power steering. I sail in big seas and big breeze with the original rudder all the time and I've found it's just a matter of learning to depower enough before you start bearing off.
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WJRyan
Commodore Joined: 12 February 2008 Location: Louisville, KY Status: Offline Points: 230 |
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As I reread the thread I wanted to share some new information about obtaining a standard or a long rudder. I recently had to obtain a new one (underwater obstruction bent post) and found both available from: Rudder Craft Inc. PO Box 9667 Boise, ID 83707 866-400-2204 https://ruddercraft.com/index.php?route=product/product&path=181_151&product_id=780 They have obtained the drawings from Farr for the long rudder. Great service, nice people, let you know more this summer. - bill
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Bill Ryan,
Room4Crew, #155 |
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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Once or twice a season we find ourselves racing to the windward mark in 20 knots gusting to 25+
As we go to round the mark the boom is eased to the shroud and ... it's not enough release of pressure to turn the boat. The boat continues to sail upwind and will not respond to the rudder. Is there some trick I'm not aware of to force the boat around? Do I need to consider an extension to the rudder? |
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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For additional information, you could google 'NACA airfoil'. When I search, a wikpedia article for National Aviation Council of Aeronautics is first on the list and a airfoils tools website is second on the list.
For example, my Merit25 keel/rudder profiles were NACA 0010; a predefined profile. So at the locations were I wanted a template, I would measure the chord length and pop that number in a tool that would generate offsets of the foil vs.increment from the leading edge (as fletch said). If I make templates for the Laser28, I might see if I can back into one of the NACA profiles to get more data points for the template |
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WJRyan
Commodore Joined: 12 February 2008 Location: Louisville, KY Status: Offline Points: 230 |
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Thanks for the education gentlemen, Frank you are waaay more technical than I could ever plan to be! I still am trying to learn about the polars (that's where the Coke bear lives I think...)
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Bill Ryan,
Room4Crew, #155 |
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Mad Max
Skipper Joined: 18 June 2010 Location: Buffalo NY Status: Offline Points: 55 |
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Page 663 will give an example of what fletch is talking about. The book can be found in some library's. In Buffalo your not allowed to borrow it, viewing only.
http://books.google.com/books?id=lWe8AQAAQBAJ&pg=PA76&lpg=PA76&dq=Theory+of+wing+design&source=bl&ots=H-MckAjDGy&sig=PwibY9VQ-nAp078l1B3xla6f7i0&hl=en&sa=X&ei=xXlIVPalL8KIsQSEjIH4DA&ved=0CDgQ6AEwBTgK#v=onepage&q=Theory%20of%20wing%20design&f=false
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Dick #122
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frfletch
Commodore Joined: 13 May 2008 Location: Canada Status: Offline Points: 365 |
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sorry for the typos. Too many Margaritas. "Top and bottom, or with a wing, inside and wingtip."
Good grief! There should be a number one can call. :-( |
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