| Re: Center Sheeting
[Re: rehmbo]
#272271 05/09/14 08:28 AM 05/09/14 08:28 AM |
Joined: Mar 2009 Posts: 932 Solomon's Island, MD samc99us
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Posts: 932 Solomon's Island, MD | It was a random thought...I have other ideas, but none get the traveler to the crew on the wire upwind when you need it.
Scorpion F18
| | | Re: Center Sheeting
[Re: rehmbo]
#272310 05/12/14 08:29 AM 05/12/14 08:29 AM |
Joined: Mar 2009 Posts: 932 Solomon's Island, MD samc99us
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Posts: 932 Solomon's Island, MD | I agree with Todd it is a last ditch resort as far as upwind in breeze is concerned. We play it a bit more downhill, but then the skipper is on the boat. It would be good to hear from some Nacra 17 teams on what they are doing with the traveler downwind double wired.
Bach,
This isn't trivial...I threw it out there to get the minds thinking, but in my head it isn't possible. The crew is on the helms wire downwind and I don't want anything attached to that wire to trip me up in my already clumsy jibes (just ask Keki Figueroa). I also don't want the helm to get tripped up on the traveler in the tacks.
What's the verdict of center sheeting off the boom?
Scorpion F18
| | | Re: Center Sheeting
[Re: rehmbo]
#272315 05/12/14 12:00 PM 05/12/14 12:00 PM |
Joined: Mar 2009 Posts: 932 Solomon's Island, MD samc99us
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Posts: 932 Solomon's Island, MD | I wouldn't make a major change like this before an event...needs at least a weekend of practice me thinks.
I've been reading a few threads on here and elsewhere. Haven't found a great photo, but I'm thinking of running the terminated end of the sheet through another block on the bottom, to a turning block on the boom and forward to a head-banger style block sitting right on the boom that the crew can sheet from. The current lazy end of the sheet would stay rigged the way it normally is, for the helm downwind.
A few other notes:
1) AHPC uses a different style boom for mid or center sheeting (beefier), 50mm diameter x 1.6mm wall thickness. According to wouter anyway, so that data may be incorrect.
2) Some teams have an additional block to create a 2:1 floating purchase between the back of the boom and center of the boom. Your purchase is increased but you are limited in the amount of sheeting you can do from the mid point
3) Darren Bundock has a normal aft 10:1 purchase system on his C2 used at Catacup. Keep it simple stupid.
Scorpion F18
| | | Re: Center Sheeting
[Re: rehmbo]
#272318 05/12/14 01:44 PM 05/12/14 01:44 PM |
Joined: Mar 2009 Posts: 932 Solomon's Island, MD samc99us
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Posts: 932 Solomon's Island, MD | Jeff,
Thanks Jeff! That's one of the bigger advantages I can see in breeze. I suspect more boats aren't rigged this way because the crew is variable. With my setup idea, it shouldn't matter too much, as the skipper can still drive it from the back like they do already.
-Sam
Scorpion F18
| | | Re: Center Sheeting
[Re: rehmbo]
#272410 05/17/14 04:36 AM 05/17/14 04:36 AM |
Joined: Nov 2011 Posts: 382 SE MI / NE IN rehmbo OP
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Posts: 382 SE MI / NE IN | As promised here are the pics. Not saying this setup is right, wrong, or optimal. Simply what I got when I bought the boat. I assume it is representative of what AHPC was selling as an option at the time (circa 2010). I have higher resolution versions of the pics if needed. Overview Measurement from aft edge of front beam to center of main block eyestrap 42 ¼" = ~1.073m Measurement from aft end of boom to turning block 50 ½" = ~1.283m (sorry for the parallax) Measurement from fore end of boom to turning block 40 ¼" = ~1.022m Note that the turning block straps had apparently been moved foreword approx 3 ½" from their original location. PO never mentioned why. Tramp reinforcement (viewed from under the tramp) No idea what the second grommet is for behind the main block.
Last edited by rehmbo; 05/17/14 04:37 AM.
| | | Re: Center Sheeting
[Re: rehmbo]
#273122 06/09/14 08:58 PM 06/09/14 08:58 PM |
Joined: Apr 2007 Posts: 291 JACKFLASH
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Posts: 291 | Is there a reason you cant have a turning block and cleat on the boom versus having it on the tramp. I am thinking a turning block and cleat like we use on the spin halyard.
Collin Casey Infusion Platform + C2 rig and rags = one fast cookie
| | | Re: Center Sheeting
[Re: rehmbo]
#273124 06/09/14 10:44 PM 06/09/14 10:44 PM |
Joined: Sep 2006 Posts: 586 Hobart, Tasmania, Oz. Dazz
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Posts: 586 Hobart, Tasmania, Oz. | you could potentially be pulling the boom over the windward side of the boat in light to medium weather.
C2 AUS 222 by Goodall design "Darph Bobo"
| | | Re: Center Sheeting
[Re: Dazz]
#273267 06/17/14 11:27 PM 06/17/14 11:27 PM |
Joined: Nov 2005 Posts: 337 Victoria, Australia C2 Mike
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Posts: 337 Victoria, Australia | you could potentially be pulling the boom over the windward side of the boat in light to medium weather. I think 49'ers and other boats have done it that way for ages | | | Re: Center Sheeting
[Re: rehmbo]
#273269 06/18/14 01:06 AM 06/18/14 01:06 AM |
Joined: Sep 2006 Posts: 586 Hobart, Tasmania, Oz. Dazz
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Posts: 586 Hobart, Tasmania, Oz. | true, but the 49'er has their main sheet setup with a V so that it can't be pulled to windward. its probably wouldn't happen but still...
C2 AUS 222 by Goodall design "Darph Bobo"
| | | Re: Center Sheeting
[Re: rehmbo]
#275430 09/16/14 03:42 PM 09/16/14 03:42 PM | Scarecrow
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Unregistered | The single block aligns to the loads better cutting down wear and friction. You can get close to fixing the issue by locking the top block at 90 degrees to the boom and/or leaving the guides from the cleat in place as it will force the top block into alignment. | | | Re: Center Sheeting
[Re: rehmbo]
#275464 09/17/14 01:09 PM 09/17/14 01:09 PM |
Joined: Feb 2005 Posts: 4,118 Northfield Mn Karl_Brogger
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Posts: 4,118 Northfield Mn | You still want all of your purchase at the back of the boat don't you, and not pulling on the middle of the boom?
I'm boatless.
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