I’m still concerned that my spreaders seem to be at too much of an angle, “up and aft”. I suspect the angle up is 45 degrees, and I’ve never noticed any on boats that aren’t perpendicular, so something seems amiss, yet the spreader boots are tight to the degree that I can’t see how and shifting could have happened, and it appears that if they were perpendicular to the mast that the stays wouldn’t be long enough to reach the chain plates. I made a reasonable attempt below at a drawing as if you are looking toward from bow as if the boat is coming directly at you. I bought this boat from a broker in Alabama who took it on a trade, so he has no clue, plus I’ve got it back in TX now anyway. I’m afraid to sail it like it is, because I’m no engineer, but I can see that a “wider distribution of the load might make it stronger, which I suppose is the whole purpose for spreaders anyway. Also have a question of how long the jib sheets I’m going to have to buy need to be. I have a working jib, and a 150% as well. I plan to initially just buy one set, and maybe at a later point get some for the smaller headsail. Any ideas on length? I’m thinking about 22 ft each. Am I close? /I\ / I \ I \I/ I spreaders approx. 45degrees instead of 90? I I I I I I
Rodney: On the M17, spreaders are perpendicular and swept slightly aft: http://www.msogphotosite.com/MSOG/b17audasea/b17audasea5.jpg Picture shows 3 of us I think and all look the same. Rear boat is Seas the Day, a M15. No spreaders on those. Outer stays go through the spreaders to the masthead. Inners to the base of the spreaders. Chainplates on the cabin sides are slightly aft of the base of the mast, so when tensioned, both sets of spreaders are swept aft very slightly. You should be able to slide the stays through the boots to get them to line up. My spreaders rotate, so you may need to rotate them at the base of the spreader so they flex fore and aft and not up. They are tensioned at the chainplates by turnbuckles. If those are missing, you might come up short, but otherwise, there should be plenty of slack to get them attached. And set your forestay and backstay to rake the mast aft a bit. Howard On Apr 3, 2008, at 7:31 AM, Rodney Holland wrote:
I’m still concerned that my spreaders seem to be at too much of an angle, “up and aft”. I suspect the angle up is 45 degrees, and I’ve never noticed any on boats that aren’t perpendicular, so something seems amiss, yet the spreader boots are tight to the degree that I can’t see how and shifting could have happened, and it appears that if they were perpendicular to the mast that the stays wouldn’t be long enough to reach the chain plates. I made a reasonable attempt below at a drawing as if you are looking toward from bow as if the boat is coming directly at you. I bought this boat from a broker in Alabama who took it on a trade, so he has no clue, plus I’ve got it back in TX now anyway. I’m afraid to sail it like it is, because I’m no engineer, but I can see that a “wider distribution of the load might make it stronger, which I suppose is the whole purpose for spreaders anyway.
Also have a question of how long the jib sheets I’m going to have to buy need to be. I have a working jib, and a 150% as well. I plan to initially just buy one set, and maybe at a later point get some for the smaller headsail. Any ideas on length? I’m thinking about 22 ft each. Am I close?
/I\
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I \I/ I spreaders approx. 45degrees instead of 90?
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_______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
Rodney: The spreaders should take the tension from the upper shrouds so that the pressure is from the tip of the spreader straight down the spreader to where it attaches on the mast. In order to do this, you need to have the same angle from spreader to wire both below the spreader and above the spreader. Usually this means that the spreader is angled slightly upward as the lower part of the shroud is near vertical and the upper part leans in towards the mast. The spreader angle fore and aft should be in direct alignment with the chainplate and the mast head so that wire tension is not trying to snap the spreader or bend the mast too much. Sometimes they seem to have a slightly aft angle which seems to help to create a little mast rake. Hope this makes some sense. Jeff M-23 "Clarity" ----- Original Message ----- From: "Rodney Holland" <rodh@earthlink.net> To: <montgomery_boats@mailman.xmission.com> Sent: Thursday, April 03, 2008 4:31 AM Subject: M_Boats: Spreaders(again) and jibsheet questions
I’m still concerned that my spreaders seem to be at too much of an angle, “up and aft”. I suspect the angle up is 45 degrees, and I’ve never noticed any on boats that aren’t perpendicular, so something seems amiss, yet the spreader boots are tight to the degree that I can’t see how and shifting could have happened, and it appears that if they were perpendicular to the mast that the stays wouldn’t be long enough to reach the chain plates. I made a reasonable attempt below at a drawing as if you are looking toward from bow as if the boat is coming directly at you. I bought this boat from a broker in Alabama who took it on a trade, so he has no clue, plus I’ve got it back in TX now anyway. I’m afraid to sail it like it is, because I’m no engineer, but I can see that a “wider distribution of the load might make it stronger, which I suppose is the whole purpose for spreaders anyway.
Also have a question of how long the jib sheets I’m going to have to buy need to be. I have a working jib, and a 150% as well. I plan to initially just buy one set, and maybe at a later point get some for the smaller headsail. Any ideas on length? I’m thinking about 22 ft each. Am I close?
/I\
/ I \
I \I/ I spreaders approx. 45degrees instead of 90?
I I I
I I I
_______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
By the way, this would be of concern because improper spreader angle can lead to spreader failures and de-masting. I had a friend that this happened to once and he had to replace his mast. Jeff ----- Original Message ----- From: "Chris and Jeff Packer" <cjpacker@theofficenet.com> To: "Rodney Holland" <rodh@earthlink.net>; "For and about Montgomery Sailboats" <montgomery_boats@mailman.xmission.com> Sent: Friday, April 04, 2008 5:06 AM Subject: Re: M_Boats: Spreaders(again) and jibsheet questions
Rodney: The spreaders should take the tension from the upper shrouds so that the pressure is from the tip of the spreader straight down the spreader to where it attaches on the mast. In order to do this, you need to have the same angle from spreader to wire both below the spreader and above the spreader. Usually this means that the spreader is angled slightly upward as the lower part of the shroud is near vertical and the upper part leans in towards the mast.
The spreader angle fore and aft should be in direct alignment with the chainplate and the mast head so that wire tension is not trying to snap the spreader or bend the mast too much. Sometimes they seem to have a slightly aft angle which seems to help to create a little mast rake.
Hope this makes some sense. Jeff M-23 "Clarity"
----- Original Message ----- From: "Rodney Holland" <rodh@earthlink.net> To: <montgomery_boats@mailman.xmission.com> Sent: Thursday, April 03, 2008 4:31 AM Subject: M_Boats: Spreaders(again) and jibsheet questions
I’m still concerned that my spreaders seem to be at too much of an angle, “up and aft”. I suspect the angle up is 45 degrees, and I’ve never noticed any on boats that aren’t perpendicular, so something seems amiss, yet the spreader boots are tight to the degree that I can’t see how and shifting could have happened, and it appears that if they were perpendicular to the mast that the stays wouldn’t be long enough to reach the chain plates. I made a reasonable attempt below at a drawing as if you are looking toward from bow as if the boat is coming directly at you. I bought this boat from a broker in Alabama who took it on a trade, so he has no clue, plus I’ve got it back in TX now anyway. I’m afraid to sail it like it is, because I’m no engineer, but I can see that a “wider distribution of the load might make it stronger, which I suppose is the whole purpose for spreaders anyway.
Also have a question of how long the jib sheets I’m going to have to buy need to be. I have a working jib, and a 150% as well. I plan to initially just buy one set, and maybe at a later point get some for the smaller headsail. Any ideas on length? I’m thinking about 22 ft each. Am I close?
/I\
/ I \
I \I/ I spreaders approx. 45degrees instead of 90?
I I I
I I I
_______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
_______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
participants (3)
-
Chris and Jeff Packer -
Howard Audsley -
Rodney Holland