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Trip to TX SPI or CC in Early Oct
by Banzilla. 07/05/21 11:17 AM
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Downhaul under spinnaker #289273
11/08/20 11:47 AM
11/08/20 11:47 AM
Joined: Oct 2020
Posts: 3
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CapriSun Offline OP
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CapriSun  Offline OP
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Hey everyone,

Do you release your main downhaul when under spinnaker? This seems to be a common recommendation and the Nacra Infusion manual says so as well: http://www.microwindracing.com/boat.html (table down the bottom, I think it’s some kind of extract but it looks official wink ).

Interestingly Capricorn manual recommends the „same“ settings as upwind: https://www.manualslib.com/manual/750751/Ahpc-Capricorn-F18.html?page=34#manual

Any ideas why that is?

Cheers

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Re: Downhaul under spinnaker [Re: CapriSun] #289274
11/11/20 11:17 AM
11/11/20 11:17 AM
Joined: Jan 2005
Posts: 6,048
Sebring, Florida.
Timbo Offline
Carpal Tunnel
Timbo  Offline
Carpal Tunnel

Joined: Jan 2005
Posts: 6,048
Sebring, Florida.
It depends on how tight the down haul was when going upwind, and what the apparent wind will be once the spinnaker is up. If it was very tight going upwind and you’ll be going very deep downwind, ease it to gets a deeper draft into the main, just remember to tighten it again at the C mark before you turn upwind again.

The goal is to maintain an optimum mainsail shape, usually flatter going upwind and fuller going downwind.


Blade F16
#777
Re: Downhaul under spinnaker [Re: Timbo] #289275
11/12/20 10:41 AM
11/12/20 10:41 AM
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Posts: 3
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CapriSun Offline OP
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CapriSun  Offline OP
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Thanks Timbo! The Infusion manual says “off” though, which sounds like “release completely”?

Here’s the different downwind Cunningham settings for different wind speeds (I’ve also found the C2 manual):

Infusion
< 6 knots: light - no wrinkles
6 to 9 knots: off
> 9 knots: off

Capricorn
1 to 5 knots: just no horizontal wrinkles
6 to 15 knots: light to hard
> 15 knots: extremely hard

C2
1 to 5 knots: just remove wrinkles
6 to 15 knots: off
> 15 knots: off

So what I’m wondering is, why does the Capricorn manual recommend different settings compared to the other boats in medium and strong winds?

Re: Downhaul under spinnaker [Re: CapriSun] #289279
12/14/20 09:47 PM
12/14/20 09:47 PM
Joined: Nov 2011
Posts: 382
SE MI / NE IN
rehmbo Offline
enthusiast
rehmbo  Offline
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Joined: Nov 2011
Posts: 382
SE MI / NE IN
Capricorn settings above look like upwind settings. Heavy Cunningham/downhall downwind with the spinnaker up in big breeze is an invitation for a folded mast. Releasing rotation and Cunningham, and keeping main sheet tension on are the three things that protect the mast above the hounds.


Jeff R

H18, C2 USA1193
cramsailing.com
crescentsail.com
Re: Downhaul under spinnaker [Re: rehmbo] #289290
04/22/21 09:01 AM
04/22/21 09:01 AM
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Posts: 3
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CapriSun Offline OP
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CapriSun  Offline OP
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Thanks Jeff! It's probably just a typo in the manual then!


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