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  #26   IP: 24.61.95.61
Old 03-24-2020, 07:57 AM
ArtJ ArtJ is online now
 
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Quote:
Originally Posted by jcwright View Post
Art,

I've attached an updated drawing of the T34C spreader, this time including the cross-sections that were missing from the earlier file.

Jack.
Jack

Is it possible to add the orientation of the slot for the stay with regard
to the mounting holes in order to know whether the holes are vertical or horizontal when mounted to the mast?
This helps in determining the direction of wear.

Thanks

art

Last edited by ArtJ; 03-24-2020 at 07:59 AM.
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  #27   IP: 100.40.58.241
Old 03-24-2020, 06:35 PM
jcwright jcwright is offline
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Hello Art.

I've updated the PDF file to include close-up views of the spreader tip, with essential measurements.

Let me know if you need anything else.

Jack.

Spreader diagram.pdf
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  #28   IP: 24.61.95.61
Old 03-25-2020, 09:00 AM
ArtJ ArtJ is online now
 
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Thank you for the details they are very nice

What I hoping for was a full length drawing showing or pointing to both ends
on the same drawing . Since the slots in the shroud end need to be vertical
and looking at both ends on the same drawing I can ascertain whether the
bolts holding the spreader to the mast bracket are vertical or horizontal.
The reason I need this is because the person with poor english who
went up the mast said the bolt end was loose. Could be enlarged holes
or undersized bolts or other damage. I did not go up the mast myself
because I injured my left arm.

I assume that the bolts are vertical in use, but want to be certain . Adding the slot location /orientation on the full length drawing which includes both holes and slot orientation would provide this

Apologies for the inconvenience which is greatly appreciated


Art

Last edited by ArtJ; 03-25-2020 at 09:21 AM. Reason: add details
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  #29   IP: 72.69.36.126
Old 03-25-2020, 10:24 AM
tenders tenders is offline
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If I'm reading the diagram correctly and understanding your question, page 1 of the diagram shows that the mounting holes are in the "wide" dimension of the spreader and the retaining bolts are thus vertically oriented.

Page 4 of the diagram shows that the upper finger of the shroud "grabber" goes forward and curls aft, while the lower finger goes aft and curls forward.

Before you get too freaked out about the looseness on the bolt end...they need to have several degrees' worth of up-and-down "slop" or wobble, or they'll snap as the mast leans back and forth a bit from port to starboard tack. What your rigger observed may be by design.

These are relatively complicated extrusions, with that gradated rectangular-to-circular shape. The top view on page 1 is exactly the same profile as my spruce spreaders. I guess the few ounces of weight savings aloft were worth it to some sailors when these boats were competitive racers, but today...?
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  #30   IP: 128.148.232.7
Old 03-25-2020, 10:40 AM
jcwright jcwright is offline
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Hello Art.

I've attached an updated PDF file that includes the image you mention in your last post. On page 2, you will see the original drawing of the spreader (top view). Just below that I've included a photo of the entire spreader from the same perspective.

I inserted "pins" (actually pens) in the two holes where the spreader is mounted to the mast to highlight their orientation. These holes are vertical, ie, parallel to the mast. I also inserted a pin in the slot at the tip of the spreader where the upper shroud rests.

Let me know if this doesn't give you and your rigger the information you need.

jack.

Spreader diagram.pdf
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ArtJ (03-25-2020)
  #31   IP: 24.61.95.61
Old 03-25-2020, 11:50 AM
ArtJ ArtJ is online now
 
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Thank you Jack and Tenders

I was embarrassed to ask the question but am glad I did!
Thank you for the clarification now I can somewhat interpret the wobble prior
to climbing the mast

The reason I was alarmed is that the person climbing said the port spreader
was somewhat vertically looser than the starboard

One thing that concerns me is that with the sails removed both port and starboard spreaders now sit horizontally - which means they do not now conform to the ideal 12 degree angle which bisects the above and below spreader angles of the upper shroud.
They appear to be allowed to sit horizontally or up 12 degrees up.
So how can they be made to stay in ideal position?? By tape on spreader tip or is the mast beefy enough to not worry about the angle ?

(My Rigger is me - but I need my own eyes on it)

Art

Last edited by ArtJ; 03-25-2020 at 12:09 PM.
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  #32   IP: 100.40.58.241
Old 03-25-2020, 12:24 PM
jcwright jcwright is offline
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The fact that one spreader shows more vertical play than the other would make me curious too. But, fwiw, both of my spreaders have always had some vertical play, ie, when the mast is unstepped. If the person who climbed your mast checked one spreader when under tension and the other when not (or under less) one spreader could appear to have more play than the other.

All I've done on our T34c is mark the uppers so the spreaders are similarly aligned when I re-rig every year. Once the uppers are seized in place, everything stays aligned over the season.

Good luck with your spreader work.

Jack
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  #33   IP: 72.69.36.126
Old 03-25-2020, 01:14 PM
tenders tenders is offline
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I find that my upper spreaders find their positions on the shroud pretty well on their own if they're sensibly placed when the spreader boots are being taped/seized on with the mast on deck. I suppose you could rig a piece of wood or something held on either end by the main and genoa halyards, with a retrieval/tensioning line held on deck, to bump yours up if you found them egregiously horizontal once the mast is in place.

The lower spreaders sometimes have to be nudged a bit with a boathook to get them into place before the shrouds are completely tightened. It isn't precision work, that's for sure.
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  #34   IP: 24.61.95.61
Old 03-25-2020, 01:35 PM
ArtJ ArtJ is online now
 
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Thanks

I definitely be up the mast soon to check everything out
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  #35   IP: 128.148.232.7
Old 03-25-2020, 04:46 PM
jcwright jcwright is offline
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@Tenders--

I missed your 10:24 am post about spreader 'play' before posting my own answer to one of Art's questions. I hadn't considered the possibility that the play is a designed feature rather than a result of wear. Interesting.

jack.
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