Too much rake

[Jared1048]

To those that have a B & R rig or have tuned one before.

I have too much rake. I've tightened \ shortened my forestay already but when I crank it down to a modest 14% breaking strength (uppers) I get too much rake.

Besides tightening the forestay and loosening the back stay how else can I remove some of the excess rake?

Thanks!
-Jared

 

[Jackdaw]

Rake is 100% a function of forestay length. Nothing else affects it.

Rake and bend/pre-bend are two separate things.

Tightening your shrouds/ adding backstay will tighten your forestay and have your mast bend with the forestay attachment point as a fulcrum, but it will not add rake.

 

[Jared1048]

Rake is 100% a function of forestay length. Nothing else affects it.

Rake and bend/pre-bend are two separate things.

Tightening your shrouds/ adding backstay will tighten your forestay and have your mast bend with the forestay attachment point as a fulcrum, but it will not add rake.

dang, I was afraid of that. Looks like I need to take off another quarter inch. I believe the harken furler is already maxed out.

Thanks,
-Jared

 

[Allan12210]

With our swept back spreaders the shrouds are also acting to hold the mast back (defacto backstay). In order to move the mast forward as you wish loosen the shrouds at the chain plates as well.

 

[rufus1138]

With our swept back spreaders the shrouds are also acting to hold the mast back (defacto backstay). In order to move the mast forward as you wish loosen the shrouds at the chain plates as well.

this is correct, the op's boat this is a limiting factor no matter what you do with the fore stay and back stay, the swept spreaders make rake hard to dial in.

jackdaw thats correct but will not be in effect on a masthead b&r that you find on the hunter 31 and 34. the isomay rigs that came a few years later were fractional and not long after that deleted the backstay altogether, the topping shrouds are especially important in achieving the rake you desire, loosen everything and get the column set that you desire then start tensioning from the lowers and work your way up the rig maintaining the desired column, if it migrates back up and find out why it shifted.

 

[Jared1048]

this is correct, the op's boat this is a limiting factor no matter what you do with the fore stay and back stay, the swept spreaders make rake hard to dial in.

jackdaw thats correct but will not be in effect on a masthead b&r that you find on the hunter 31 and 34. the isomay rigs that came a few years later were fractional and not long after that deleted the backstay altogether, the topping shrouds are especially important in achieving the rake you desire, loosen everything and get the column set that you desire then start tensioning from the lowers and work your way up the rig maintaining the desired column, if it migrates back up and find out why it shifted.

Yes, when I loosen my upper shrouds I like the amount of rake that I have but then the shrouds only have a few % breaking strength and no where near the ~15% that I've read it should be at.

 

[rufus1138]

15 % isnt critical, adjust for the rake and go work the boat and observe how the rig behaves, if they never go sloppy during the run then go with it.