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View Full Version : RUNNING BACKSTAYS FOR CATAMARANS SAILING OFFSHORE?


Maxingout
20th October 2008, 01:41 AM
Everyone cruises in their own comfort zone, and they decide how hard they are going to push their yacht offshore.

I was introduced to the tradewinds in the Caribbean in the Navy when I sailed out of Roosevelt Roads Naval Station in Puerto Rico. Those five years in the Caribbean exposed me to trade winds that could blow at 20-25 knots for weeks at a time, especially when the "Christmas winds" were blowing.

I was sailing a Westsail 32 with a cutter rig at the time, and I was accustomed to using running backstays when beating to windward under staysail and reefed main. The running backstays kept the mast in column, and they provided an additional level of security in the event of a rigging failure.

When I purchased my Privilege 39 catamaran, Exit Only, I knew that I would be sailiing her downwind around the world in the trade winds for the majority of the trip. I looked at the capshrouds on board Exit Only, and I remembered the reinforced trade winds that I had experienced in the Caribbean so many years before. I knew that if I ever lost a capshroud on Exit Only, the rig would likely go overboard. I also knew that Exit Only was going to be a downwind sailing machine - we were heading out on a downwind adventure around the world.

I called up my rigging friend, Andy Wall, and I asked him to make some running backstays and install them on Exit Only. He made them up and ran them from just below the mast head to my capshroud chainplates which had points of attachment for the running backstays.

I then set off around the world, watching my capshrouds like a hawk (12 mm wire) as we sailed downwind across the Pacific. I took up the strain on the windward running back stay to reduce the shock loading on the windward capshroud.

The running backstays did their thing all the way around the world.

At the completion of our circumnavigation, we had replaced all the rigging on board Exit Only except for the two capshrouds. They survived intact.

It seems interesting that the only pieces of rigging that survived the entire trip was the capshrouds that had been backed up by the running backstays.

I wonder if I had sailed without the runners, would the capshrouds have gone the way of all the other rigging on board, or would the capshrouds have survived.

I don't know if my running backstays kept my capshrouds alive, but I do know that they made me feel better as I sailed downwind in the trades. Lots of times the accentuated trades blew at 25-30 knots, and I was always glad that the running backstays were there.

Running backstays add weight to the yacht, and if you aren't sailing downwind for 30,000 miles, perhaps you would be better without them.

What do you think? Is it worth the weight and expense to add running backstays if you are going to sail downwind in the trade winds for 33,000 miles?

FELIX 68
20th October 2008, 11:28 AM
My experience with running backstays is entirely positive. Modern weight saving aloft is OK for racing machines with a wealthy sponsor when the stick goes over the side to pick up the tab. Cruising with just three wires holding up the mast,the failure of one, disaster!!

redbreast
20th October 2008, 06:48 PM
Hi all, now this is a very interesting subject.
We are about to purchase our first big Catamaran and having researched cats for a while now, visited various boat shows and talking to a lot of people. We have also had the pleasure of quite a few sea trials. Now interestingly the Fusion 40 has a running backstay and i seem to remember when it came down to the cleat end it was down to something like 8mm cord, i guess prior to the cord it has a steel wire stay, the boat we are about to purchase does not have any running backstay its 46" long but its sister ship of 50" does have them.
Im will have them fitted , but as it has a rotating mast i will have to make sure i contact the makers prior to installing them, im not sure i would go quite as heavy as 12mm though, will have to wait and see what they suggest. A couple of questions, then , how easy are they to set up and how much tension do you put on. ?

ireaney
20th October 2008, 07:06 PM
Hi all, now this is a very interesting subject.
We are about to purchase our first big Catamaran and having researched cats for a while now, visited various boat shows and talking to a lot of people. We have also had the pleasure of quite a few sea trials. Now interestingly the Fusion 40 has a running backstay and i seem to remember when it came down to the cleat end it was down to something like 8mm cord, i guess prior to the cord it has a steel wire stay, the boat we are about to purchase does not have any running backstay its 46" long but its sister ship of 50" does have them.
Im will have them fitted , but as it has a rotating mast i will have to make sure i contact the makers prior to installing them, im not sure i would go quite as heavy as 12mm though, will have to wait and see what they suggest. A couple of questions, then , how easy are they to set up and how much tension do you put on. ?
I had a great interest in the Fusion 40 but never noticed they had running backstays, I must look at the pictures again on the web site, can you remember which boat had them.
I also would like to know how easy to set up and the tension and I suppose you would use Dyneema lines to save weight, would you??
By the way Redbreast nice looking boat, I think I have worked out which one you are looking at.;)

Nordic
20th October 2008, 08:34 PM
, the boat we are about to purchase does not have any running backstay its 46" long but its sister ship of 50" does have them.
Im will have them fitted , but as it has a rotating mast i will have to make sure i contact the makers prior to installing them, im not sure i would go quite as heavy as 12mm though, will have to wait and see what they suggest. A couple of questions, then , how easy are they to set up and how much tension do you put on. ?

With a rotating mast, the stays can be more sloppy than a traditional rig, as the mast is not stiffened by the stays, only held up. I would reckon that 10 mm dyneema is more than strong enough, 8mm would probably also be enough.

I have Spectra stays on my boat, they do get sloppy and need tightening. While sailing in a strong chop I use "suckers" as the americans call them. 10 mm "elastic rope" that go from the side stays to the aft cleats, just tighten them up so that the stays don't jerk around too much. Much more comfortable and easier on the whole rig...

The tension for the backstays probably not more than you can tighten by hand if you attach them at the same height as the side stays, when they load up you can hand tighten the lee side.


All these problems;), now you understand why I like unstayed masts:D

Alan