Rigging a gennaker on a C&C 24 - SailNet Community
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post #1 of 31 Old 09-17-2011 Thread Starter
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Rigging a gennaker on a C&C 24

So I'm thinking of getting a gennaker for my little tub to help me keep moving on our typical low wind days here. I don't currently have any spin/gen rigging, although I believe there are two sheaves at the front of the mast, both inside the forestay.
Is there any reason I can't use the existing jib halyard as a gennaker halyard, and then put a second one up there at a later date? Obviously I would have to gybe the genn on the inside which I understand isn't the preferred method. I'm guessing that a proper spin halyard is going to mean fabrication of brackets etc at the mast head?
Anyone with a C&C24 running spins/gens with nice photos of how its attached at the various points?

Orange Crush
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post #2 of 31 Old 09-17-2011
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You'll have a serious problem with halyard chafe because with jib halyards the assumption is that the lead is straight parallel with the headstay. On gennakers/Assymetricals the loads are most often side-loaded. You'll really be well advised to go to the effort of installing a proper, swiveling block above the forestay.

If you're still using wire jib halyards you'll likely cut the halyard exit... if not the halyard would chafe seriously if used with a gennaker/asymm.

There may already be a tab or decent place to mount the proper halyard.. if not it's not difficult to fabricate.

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I've been looking round on that there Internet thing, and there's a number of photos of spins/gens flying on these boats, and I can't see any of them with any kind of bracketry that I don't have already on mine. I'm wondering if I am not giving the designers enough credit and that what's up there is actually all I need, aside from perhaps the block itself. I'm trying to find a decent photo of a masthead with spin/gen gear.

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post #4 of 31 Old 09-17-2011
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Paul

I can't find a pic either. But here is the add-on for a Catalina 30 with a description. This is the kind of item you need to get a fair lead for a spinnaker.
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K30520_S01.jpg  

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Thanks Brian, that looks like the sort of thing, but I've not come across an equivalent for mine yet. I'll do a bit more digging, there's plenty of C&C24s raced so there must be someone out there somewhere that knows a little on the specifics of this boat.

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Here's a pic of a C&C27 masthead.. may be similar. Note there is a place for the pin for the spinn halyard block on the left..( ignore the red arrow)


Ron

1984 Fast/Nicholson 345 "FastForward"

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Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
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Thanks, I'll have a look at mine in a bit, I think it looks the same. External halyard I guess?

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External is easiest to rig, of course... but the halyard could enter the mast a foot or so down and re-exit again near the deck. That does include some work aloft adding the entry slot.... Not necessary but cleaner looking.

If you don't have a similar tang that might be drilled or already available, a simple crane could be made with an aluminum or SS flatbar, drilled and tapped into the masthead casting, extending forward 4 or 5 inches with a u-bolt at the forward end. You might want to cruise a marine consignment store (still one in Sidney??) for some ideas and/or bits and bobs for all of this.

Ron

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OK, had a look and there's definitely a pair of "horns" as in the C&C27 photo above. Nice, so just a question of getting the appropriate blocks/swivels and the lines. And the genn of course

Orange Crush
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