1976 Hunter 25 Shroud Tension

[KenMu]

Can anyone tell me the proper tension for my shrouds using a tension gauge. A guy at the dock who buys and fixes up boats then sells them had told me I needed to tighten them up. I tightened the shrouds but now they are two tight.

New to sailing and lesson learned research information no matter how long someone at the dock has been sailing.

 

[Jackdaw]

An older H25 is a masthead rig, rare for Hunter. Find your exact rig configuration in this guide. Based on your rigging diameter, it will tell you your tension, which is always a percentage of max strain based on size.

https://www.dropbox.com/s/ilab8s9lqta2mjv/Selden Hints and Advice.pdf

 

[twodzusfittings]

Great information, thanks.

 

[KenMu]

Anyone by chance have the numbers from a Loos tension meter. I appreciate the document and I did download it and read it. Being my first time I am alittle nervous about just relying on my understanding if the info.

 

[Jackdaw]

Anyone by chance have the numbers from a Loos tension meter. I appreciate the document and I did download it and read it. Being my first time I am alittle nervous about just relying on my understanding if the info.

What is the size of your standing rigging?

 

[KenMu]

Okay, I measured the lines with caliber. The center line that goes to the top of mast is 10mm. The two lines that go half way up the mast are between 9 and 10mm. Hope this is enough info.

 

[twalker H260]

Loos tension conversion from the numbers in the previous referenced document to the loos settings based on pt-1,2or3 available here:

http://loosnaples.com/how-to-use-pt-series-tension-gauges

You will need the pt-3 or 3m if your rigging is really that heavy. That is at the upper end of what the pt series of loos gauges are capable of. - (heaviest cable on the h260 is 5mm)

Could she have been re rigged with heavier standing rigging? If so going to 10-20% of breaking strength would likely start breaking mast, deck or chain plate components long before getting near that tension in the rigging.

I did search a bit to find the original rigging specs on a Cherubini 25 but with no success.

 

[KenMu]

Well, sorry to say but read the caliber wrong. I guess that is what I get for going out after dark and being in a hurry.

The actual numbers are 5mm for the cable attached to the mast head and 4.5mm for the cables attached mid mast.

 

[KenMu]

After researching online it looks like all cables would be considered a 3/16 cable.