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Old 17-01-2011, 18:01   #1
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Hunter 31 - B&R Rig

I am looking at (actually have an offer in on) a 1984 Hunter 31.

I have been reading a bit on B&R rigs, and everything says they have no backstay, allowing for more mainsail roach.

This boat has, what to my eyes, is a backstay - it's a steel cable running from near the masthead towards the stern, amidship, and then splits into two cables that attach at the transom to port and starboard. How is this not a backstay?
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Old 17-01-2011, 18:20   #2
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Quote:
Originally Posted by sandycohen View Post
I am looking at (actually have an offer in on) a 1984 Hunter 31.

I have been reading a bit on B&R rigs, and everything says they have no backstay, allowing for more mainsail roach.

This boat has, what to my eyes, is a backstay - it's a steel cable running from near the masthead towards the stern, amidship, and then splits into two cables that attach at the transom to port and starboard. How is this not a backstay?

Because that boat isn't a B&R rigged boat.
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Old 17-01-2011, 18:22   #3
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Don - Thanks for your reply. According to hunters literature on their website (they have the old brochure up) it is a B&R rig. Also, the spreaders are significantly swept-back and there is significant prebend in the mast which I understand to be trademarks of a B&R rig.
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Old 17-01-2011, 18:35   #4
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OK you win!
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Old 17-01-2011, 19:11   #5
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While planning to sail a Spinaker from the top of my mast on a Hunter 326 (with a B&R rig), I found that there is no support to offset the force of it. The B&R rig shrouds only go up as high as the fractional gib. So, a professional rigger pointed out that prior to flying the spinaker, I would need to install a backstay from the top of the mast. More investigation in progress......
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Old 17-01-2011, 19:24   #6
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Our friends have the same boat that you're looking at.....it has a B&R rig, and a small vestigal looking backstay attached to some u-bolts at the stern.
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Old 17-01-2011, 20:09   #7
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Thanks sailmonkey. Kind of like a vestigal tail on early man?

What do your friends think of their h31? Are they on the Gulf
Coast also?
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Old 17-01-2011, 20:45   #8
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I have uploaded some pics and brief description from my owners manual on the B&R rig. They are in my profile, and I think I have uploaded some to this message.... well obviously I got the pics up here, except for the text from the manual. That is in my profile..
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Old 17-01-2011, 21:29   #9
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I've seen a late 90's Hunter 410 with the same setup. It deffinately had the swept back spreaders but also had a single 'backstay' running down to the stern. I wonder if some owners have fitted them for piece of mind?
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Old 18-01-2011, 02:56   #10
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I quite like Hunters with B&R rigs, as cruising boats they seem to work well.
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Old 18-01-2011, 03:27   #11
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Rumor I heard was even though the B&R didn't need a backstay Hunter didn't think they could sell the boat without a backstay.

This book though says that initially when the B&R rig was designed it was thought a backstay was required, but after some experimentation it was found that the backstay wasn't needed.

Yacht Design Explained: A Sailor's ... - Google Books
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Old 18-01-2011, 05:04   #12
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Whle you don't need a backstay on a B&R rig, it certainly couldn't hurt (belts and suspenders).

The Ron Holland designed Discovery 55 has a B&R rig and a sizable backstay. In the picture you can see between the spreaders the B&R "X" formed by the "reverse diagonal" shrouds.

I'm not sure why the boat is rigged this way. The mainsail is mast furled so there's not much roach. The B&R is supposed to provide a thinner mast section that is extremely stiff and tunable - and no forward lowers get in the way of the close sheeted blade jib.
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Old 18-01-2011, 05:13   #13
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Supposedly the laclack of backstay let's the mainsail be cut with more roach. If the owner adds a backstay that wouldn't be the case.
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Old 18-01-2011, 21:33   #14
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Thanks sailmonkey. Kind of like a vestigal tail on early man?

What do your friends think of their h31? Are they on the Gulf
Coast also?
They like it, actually in the slip next to us. The only complaint is the tendency for the boat to wander in a slight following sea.
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