My mast is off the boat, perfect time to add a halyard or two. There are two unused sheaves, one forward and one aft. I am planning to use the aft sheave for a spare halyard to the topping lift which will give me complete control of the boom. What about using the forward sheave for a spinnaker halyard? It would put the head behind the forestay, is this a problem? There is also a heavy bale(U-bolt) over the forestay which could handle a block. Is this a better option for a spinnaker halyard? Could I still run an in-mast halyard and use the block? It would just be so much cleaner to use that sheave.
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Bill Murray
Gybe or Tack?
If the head of your spinaker is above the forestay (outside the triangle) you must gybe the boat to change directions downwind. This is the traditional way that spinakers are rigged. If you use a sheave inside the triangle, you will have to tack the sail inside the forestay. depending on the size and cut of the sail tis can be no easy task or - for some it might be preferred. Think it over carefully.
If the head of your spinaker is above the forestay (outside the triangle) you must gybe the boat to change directions downwind. This is the traditional way that spinakers are rigged. If you use a sheave inside the triangle, you will have to tack the sail inside the forestay. depending on the size and cut of the sail tis can be no easy task or - for some it might be preferred. Think it over carefully.
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Edward Kennedy
What I've seen
I was looking at another 37c which had a spinnaker haulyard done with an external block at the masthead. You probably can use the internal sheave, but there will be some chafe where the haulyard rubs against the forestay. Also, I plan to be pulling the mast on my 37c, and want to know if there is anything I need to look out for.
I was looking at another 37c which had a spinnaker haulyard done with an external block at the masthead. You probably can use the internal sheave, but there will be some chafe where the haulyard rubs against the forestay. Also, I plan to be pulling the mast on my 37c, and want to know if there is anything I need to look out for.
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Don Alexander
Spin Boom Topping Lift?
Ed, In addition to the wise counsel from other responders please remember that you will also need a spinnaker boom lift and this should emerge from the mast well below the topping lift. If this sheave etc is there it would be a reasonable bet that the upper sheave was also intended for a spin halyard. Suggest you take a look at other boats. Binoculars are good and save climbing their masts!
Ed, In addition to the wise counsel from other responders please remember that you will also need a spinnaker boom lift and this should emerge from the mast well below the topping lift. If this sheave etc is there it would be a reasonable bet that the upper sheave was also intended for a spin halyard. Suggest you take a look at other boats. Binoculars are good and save climbing their masts!
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Bill Ebling
Asymetrical Spinnaker Halyard Setup
If you are going to add an asymetrical spinnaker you can run the halyard internally in the mast and fly the spinnaker inside the triangle. Here's how my 31' is set up with an Isomat mast(two mast head sheeves fore, two aft). I have a roller furler for the jib that uses the Starboard mast head sheeves for the Jib Halyard. The spinnaker Halyard exits the forward port mast head sheeves and goes directly down to a Schaefer Halyard restrainer attached to the mast about 8" below the mast head (its a large tapered fair lead). This keeps the spinnaker halyard out of harms way of the top swivel of the roller furler. The spinnaker tack pendant is shackled to a hole drilled in anchor roller aft of the furler can. Everything rins inside the forestay. Tacks and gybes like a jib. About 16 feet up the mast from the base I have a small exit sheeve on the front of the mast for 1/4" line that serves as my whisker poles topping lift. (I use an Isomat car for the pole ring that slides in the formed track). If I had an additional exit sheeve at the base of the mast I would run a halyard for the boom topping lift as you want to do. Yesterday's Dream 1985 H31
If you are going to add an asymetrical spinnaker you can run the halyard internally in the mast and fly the spinnaker inside the triangle. Here's how my 31' is set up with an Isomat mast(two mast head sheeves fore, two aft). I have a roller furler for the jib that uses the Starboard mast head sheeves for the Jib Halyard. The spinnaker Halyard exits the forward port mast head sheeves and goes directly down to a Schaefer Halyard restrainer attached to the mast about 8" below the mast head (its a large tapered fair lead). This keeps the spinnaker halyard out of harms way of the top swivel of the roller furler. The spinnaker tack pendant is shackled to a hole drilled in anchor roller aft of the furler can. Everything rins inside the forestay. Tacks and gybes like a jib. About 16 feet up the mast from the base I have a small exit sheeve on the front of the mast for 1/4" line that serves as my whisker poles topping lift. (I use an Isomat car for the pole ring that slides in the formed track). If I had an additional exit sheeve at the base of the mast I would run a halyard for the boom topping lift as you want to do. Yesterday's Dream 1985 H31
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Jeff Bacon
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Ed Schenck
Thanks guys.
Boy did this get technical! And I wasn't clear about my intentions. I just want a little downwind help with an asymmetrical, no poles involved. Since it's a cutter with a mid-stay I don't think I can go inside the triangle without problems. So it looks like a block on the bale. Maybe with an internal halyard if I can get the exit point right. But I will take the advice to study some in the marina with my binoculars. With a little luck I will find something affordable at Annapolis next week! Ed, nothing too unusual about pulling the mast. See "Cherubini Forum".
Boy did this get technical! And I wasn't clear about my intentions. I just want a little downwind help with an asymmetrical, no poles involved. Since it's a cutter with a mid-stay I don't think I can go inside the triangle without problems. So it looks like a block on the bale. Maybe with an internal halyard if I can get the exit point right. But I will take the advice to study some in the marina with my binoculars. With a little luck I will find something affordable at Annapolis next week! Ed, nothing too unusual about pulling the mast. See "Cherubini Forum".
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