Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
Search
Centerboard replacement
¿ªÔÆÌåÓýHi Dudley----I own hull #535, Seannachie.?? I, too, have had the
same thought about casting a board out of bronze.?? What's more, there
is a small foundry in my town which will be losing its lease soon, but which has
much experience in large bronze castings, and might be willing to do the job if
we're not talking next year.?? They do a lot of those big seals on
courthouses, statuary, and such.?? Do you think others might be
interested?? I'm sure any foundry would be much more interested in casting
a dozen or so than just one.?? Any thoughts appreciated-----Warren
Stein See what's free at . |
|
Dudley,
toggle quoted message
Show quoted text
At the old tratan27owners.com someone with a user name of CStroup posted a photo of the centerboard aligned over a 1" grid. I am attempting to contact him to see if he can find this picture. Alternatively Ken may be able to find this photo but I would not be too hopeful of that as it was embedded in the Projects section of the old forum which has not been recovered. Tartanparts.com will graciously sell you a replacement for $1200 that takes 4-6 weeks for delivery. You might be able to talk to them and see if they will 'give' you the exact dimensions. I am going out on a limb here but I bet that you could get this made by a local metal working shop for well less than half of what they want. I can only assume that your old C/B is gone to the bottom of the ocean so you can't get the dimensions from it. On a related note I was finally able to paint our centerboard this spring after 4 years of ownership. I was surprised that it was in pretty good shape minus a ton of barnacle buildup (even in the lower Hudson River). It is pretty rectangular so it should be easy for a metal shop to fabricate. I could not tell if it was epoxied or just a metal that appeared to be at least 1" thick. The information.htm File on T27Owners says that the early models had a bronze centerboard as you already seem to know. I think that it weighs over 100#s. Not sure if this helps. Alternatively you might be able to get the exact dimensions from Sparkman & Stephens website as Olin Stephens was the designer of this boat. I believe that there is a link to S&S under the Links section. You can sail the boat without the centerboard but I would recommend you get a new one made as it adds ballast down low and helps the boat tack upwind among many other useful attributes that includes steering under power in tight spots. Good luck with this. We will try to help out as we can. Caleb #328 Odalisque -----Original Message-----
From: kc7zik@... To: T27Owners@... Sent: Tue, 15 May 2007 5:25 PM Subject: [T27Owners] Centerboard replacement Hello, I need help in locating a drawing of centerboard for T27 hull#54. I want to recast a new one out of bronze. My wife and I purchased her last summer and are starting to work on things now. Thanks for any help Dudley ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. |
|
I Have Hull #220, and I too am replacing my centerboard,?my original CB?has de lamination
problems. ? I am having a local metal fabricator make one out of 316 stainless (1/4")?at a cost of $800. ? I do have the CB photo layed out on a 1" grid, i will scan it and post it tomorrow. I also traced my CB and would be willing to mail the tracing to anyone who needs it. Steve Cook ? 508-736-4404
Download Messenger. Start an i¡¯m conversation. Support a cause. |
|
toggle quoted message
Show quoted text
-----Original Message-----
From: cooksm@... To: t27owners@... Cc: mkstroup@... Sent: Tue, 15 May 2007 9:00 PM Subject: RE: [T27Owners] Centerboard replacement I Have Hull #220, and I too am replacing my centerboard,?my original CB?has de lamination problems. ? I am having a local metal fabricator make one out of 316 stainless (1/4")?at a cost of $800. ? I do have the CB photo layed out on a 1" grid, i will scan it and post it tomorrow. I also traced my CB and would be willing to mail the tracing to anyone who needs it. Steve Cook ? 508-736-4404 -------- To: T27Owners@... CC: MKSTROUP@... From: calebjess@... Date: Tue, 15 May 2007 19:42:31 -0400 Subject: Re: [T27Owners] Centerboard replacement Dudley, At the old tratan27owners.com someone with a user name of CStroup posted a photo of the centerboard aligned over a 1" grid. I am attempting to contact him to see if he can find this picture. Alternatively Ken may be able to find this photo but I would not be too hopeful of that as it was embedded in the Projects section of the old forum which has not been recovered. Tartanparts.com will graciously sell you a replacement for $1200 that takes 4-6 weeks for delivery. You might be able to talk to them and see if they will 'give' you the exact dimensions. I am going out on a limb here but I bet that you could get this made by a local metal working shop for well less than half of what they want. I can only assume that your old C/B is gone to the bottom of the ocean so you can't get the dimensions from it. On a related note I was finally able to paint our centerboard this spring after 4 years of ownership. I was surprised that it was in pretty good shape minus a ton of barnacle buildup (even in the lower Hudson River). It is pretty rectangular so it should be easy for a metal shop to fabricate. I could not tell if it was epoxied or just a metal that appeared to be at least 1" thick. The information.htm File on T27Owners says that the early models had a bronze centerboard as you already seem to know. I think that it weighs over 100#s. Not sure if this helps. Alternatively you might be able to get the exact dimensions from Sparkman & Stephens website as Olin Stephens was the designer of this boat. I believe that there is a link to S&S under the Links section. You can sail the boat without the centerboard but I would recommend you get a new one made as it adds ballast down low and helps the boat tack upwind among many other useful attributes that includes steering under power in tight spots. Good luck with this. We will try to help out as we can. Caleb #328 Odalisque -----Original Message----- From: kc7zik@... To: T27Owners@... Sent: Tue, 15 May 2007 5:25 PM Subject: [T27Owners] Centerboard replacement Hello, I need help in locating a drawing of centerboard for T27 hull#54. I want to recast a new one out of bronze. My wife and I purchased her last summer and are starting to work on things now. Thanks for any help Dudley __________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. -------- Download Messenger. Start an i conversation. Support a cause. Join Now! ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. =0 |
¿ªÔÆÌåÓýAttached is photo of the presumably original centerboard
from our 1978 T27-2. Pivot hole?at left, pennant hole at top middle. The
cutaway sections were made to check on internal corrosion, of which there
was?plenty. The board was also badly delaminated near the corrosion.
We?bought a?new centerboard from the factory, which is not yet
installed.
?
The dashed line on the cb indicates approximate location
of the steel plate, as determined by sliding a strong magnet over the board.
Note that there is no steel plate at the left end, which is basically the part
of the board which stays in the centerboard trunk. My guess is the reason for no
steel in that area?is in the event of a very hard sideways grounding, it
would be preferable to break the board rather than the hull and/or the
centerboard trunk. Might be worth checking with the Tartan factory on
this.
?
There is a brass or bronze disk embedded in the
board?at the pivot hole.?
?
If needed, I can supply more details on?this cb
and/or the new one.
?
Jack Wyman
T27-2
Hull #667
"Seakindly"
Manchester, Michigan |
|
Thanks for the photo Jack. I had not realized that our centerboard was
toggle quoted message
Show quoted text
designed to be a break away component. It makes perfect sense though as if the centerboard breaks before the trunk does than the boat will most likely still float whereas if the trunk broke below the waterline, well, can you say bucket brigade or abandon ship? Some of this helps explain the rather expensive replacement cost ($1200) at tartanparts.com. This is also making me think that using a sheet of 1/4" (#316) stainless cut to the full dimensions is not such a bad idea. Even if it is covered in epoxy and cloth it might bend (but not break) in a hard sideways grounding situation. This also makes me wonder if a centerboard made completely of bronze could be vulnerable to a catastrophic leak in a hard sideways grounding situation or might be too heavy for the existing hardware. Granted, my T27 does not usually sail sideways (a little when close hauled) but it is interesting to note that the designers (S&S) took the time to consider this possibility however remote. Clever buggers! In bad weather with lumpy seas it is more of a possibility than the kind of weather I usually like to sail in. The few centerboard groundings I have experience with involved low speeds and winds and a muddy river bottom. I think that our board is light enough that it can be pushed up by obstructions below which add to its functionality as a depth meter. I wonder if you know the weight of your deteriorated centerboard? I think that what people who want to fabricate their own centerboards need is the overall dimensions of the board itself. I remember seeing a photo of the board which was aligned on a large piece of paper that had a grid of 1" squares on it so you could count off the inches of all the dimensions. Thanks for your input. Caleb #328 Odalisque, 1967 - Douglas & McLeod builders -----Original Message-----
From: jackwyman@... To: T27Owners@... Cc: jackwyman@... Sent: Wed, 16 May 2007 9:52 PM Subject: [T27Owners] Re: Centerboard replacement Attached is photo of the presumably original centerboard from our 1978 T27-2. Pivot hole?at left, pennant hole at top middle. The cutaway sections were made to check on internal corrosion, of which there was?plenty. The board was also badly delaminated near the corrosion. We?bought a?new centerboard from the factory, which is not yet installed. ? The dashed line on the cb indicates approximate location of the steel plate, as determined by sliding a strong magnet over the board. Note that there is no steel plate at the left end, which is basically the part of the board which stays in the centerboard trunk. My guess is the reason for no steel in that area?is in the event of a very hard sideways grounding, it would be preferable to break the board rather than the hull and/or the centerboard trunk. Might be worth checking with the Tartan factory on this. ? There is a brass or bronze disk embedded in the board?at the pivot hole.? ? If needed, I can supply more details on?this cb and/or the new one. ? Jack Wyman T27-2 Hull #667 "Seakindly" Manchester, Michigan [Image Removed] ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. =0 |
|
I'm not sure if the centerboard was designed for quick breakaway. It
toggle quoted message
Show quoted text
was just a guess. Thinking more about why there is no steel in the top of the board, it might also be because the weight does a lot more good if it's down further. The weight is there only to get the board down in the first place, and then to keep it down even at hull speed. Having weight near the pivot point doesn't contribute much. The board weighs only a little over 100 pounds, so it contributes very little in the way of ballast. When we ordered the new cb, they needed the distance on our old board from pivot to pennant holes. So even though they knew our model and hull numbers, apparently there were differences among boats. Jack Wyman T27-2 Hull #667 "Seakindly" --- In T27Owners@..., calebjess@... wrote:
|
|
mp_leahy
--- In T27Owners@..., "Jack Wyman" <jackwyman@...> wrote:
I am contemplating a centerboard rebuild. The steel has rusted andbulged the board. Would you update your experience for me? I like the idea of a factory board if they are made or a bronze replacement if practical. thanks Attached is photo of the presumably original centerboard from our1978 T27-2. Pivot hole at left, pennant hole at top middle. The cutaway sections were made to check on internal corrosion, of which there was plenty. The board was also badly delaminated near the corrosion. We bought a new centerboard from the factory, which is not yet installed. steel plate, as determined by sliding a strong magnet over the board. Note that there is no steel plate at the left end, which is basically the part of the board which stays in the centerboard trunk. My guess is the reason for no steel in that area is in the event of a very hard sideways grounding, it would be preferable to break the board rather than the hull and/or the centerboard trunk. Might be worth checking with the Tartan factory on this. hole.
|
to navigate to use esc to dismiss