A jack stay is used to eliminate the need to change sails. You can rig a jib or storm jib on the jack stay. This is helpful in a stiff breeze and really useful when the boat has a roller furling genaoa.It is generally a stay added just in inboard of the bow cleat or cleats and going only about 3/4s of the the way up the mast, with no need for a boom. Thus creating sort of a cutter rig, although my motivation is to eliminate sail changes in heavey weather. Roll up genoa and hoist the jib.
zenithp@aol.com
Jack Stays
Moderator: Jim Walsh
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Larry DeMers
Re: Jack Stays
Paul,
I am in the process of adding a second inner stay to my CD30c. It is as you indicate, mounted inboard of the roller furling (actually using the spinnaker's pad eye on the bow sprit and a second tang to be added to the mast, just under the spinnaker halyard's block. I will use a 'highfield lever' to make this a temporary stay, to be used only with the storm jib (currently being built by Defender Ind's Cruising Direct Sails - a North Sail loft).
The idea is that when we reach the dbl. reefed main, and staysail point of sailing, (generally in winds above 45kts), we are not able to point very well at all..and the tacks are through about 160 deg. when the wind gets over 50kts., so we need more drive up forward. This arrangement should provide that drive, as well as give us a sail that we can use for all winds over 50 (no main or staysail is assumed here).
I look at it as our last sail reduction before bare poles/running with the wind.
Because the new tang is to be mounted at the top of the mast, where the support from the backstay is best, we will probably not need to add running back stays. But adding the tang lower down, say as a fractionally rigged jib will require that running back stays be added too. The mast section on the CD30 is generous, no doubt, but the section will not support a fractionally rigged storm sail in high wind conditions without "pumping", which leads to mast section failure.
Runners do not have to be anything exotic. They can be simply a set of Ultra low stretch lines led from an attachment point directly opposite the storm sail attachment point. A smart idea would be to use the same through mast bolts to hold both the upper tang forthe storm sail, as well as the tangs for the runners. You weaken the mast with each hole drilled, so to limit the number of holes is a 'good thing'. ;^))
Cheers!!
Larry DeMers
s/v DeLaMer
Cape Dory 30 ~~~Sailing 'Lac Superiore'~~~
demers@sgi.com
I am in the process of adding a second inner stay to my CD30c. It is as you indicate, mounted inboard of the roller furling (actually using the spinnaker's pad eye on the bow sprit and a second tang to be added to the mast, just under the spinnaker halyard's block. I will use a 'highfield lever' to make this a temporary stay, to be used only with the storm jib (currently being built by Defender Ind's Cruising Direct Sails - a North Sail loft).
The idea is that when we reach the dbl. reefed main, and staysail point of sailing, (generally in winds above 45kts), we are not able to point very well at all..and the tacks are through about 160 deg. when the wind gets over 50kts., so we need more drive up forward. This arrangement should provide that drive, as well as give us a sail that we can use for all winds over 50 (no main or staysail is assumed here).
I look at it as our last sail reduction before bare poles/running with the wind.
Because the new tang is to be mounted at the top of the mast, where the support from the backstay is best, we will probably not need to add running back stays. But adding the tang lower down, say as a fractionally rigged jib will require that running back stays be added too. The mast section on the CD30 is generous, no doubt, but the section will not support a fractionally rigged storm sail in high wind conditions without "pumping", which leads to mast section failure.
Runners do not have to be anything exotic. They can be simply a set of Ultra low stretch lines led from an attachment point directly opposite the storm sail attachment point. A smart idea would be to use the same through mast bolts to hold both the upper tang forthe storm sail, as well as the tangs for the runners. You weaken the mast with each hole drilled, so to limit the number of holes is a 'good thing'. ;^))
Cheers!!
Larry DeMers
s/v DeLaMer
Cape Dory 30 ~~~Sailing 'Lac Superiore'~~~
Paul wrote: A jack stay is used to eliminate the need to change sails. You can rig a jib or storm jib on the jack stay. This is helpful in a stiff breeze and really useful when the boat has a roller furling genaoa.It is generally a stay added just in inboard of the bow cleat or cleats and going only about 3/4s of the the way up the mast, with no need for a boom. Thus creating sort of a cutter rig, although my motivation is to eliminate sail changes in heavey weather. Roll up genoa and hoist the jib.
demers@sgi.com