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kiethordrum
Joined: 12 Jun 2015 Posts: 25
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Posted: Mon Sep 10, 2018 1:34 pm Post subject: Mast Extension minimum measurements |
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Can anyone help explain bow i measure my total luff to match stated sail downhaul recommendations.
1st hole on a Chinook mast ext is what ?
Where do i measure from on downhaulnrollers rollers.?
Do different base connection types need different measurements? |
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dhmark
Joined: 04 Sep 2007 Posts: 376
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Posted: Mon Sep 10, 2018 2:08 pm Post subject: |
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Different Chinook extensions have slightly different distances for the lowest setting, depending on how old, RDM, SDM. (guessing 8-11 cm) It is supposedly the distance to the top of pulleys, its never quite accurate to the printed mark, but downhauling a sail correctly is not exact to printed dimensions. Good starting point IF it is the correct mast. |
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swchandler
Joined: 08 Nov 1993 Posts: 10588
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Posted: Mon Sep 10, 2018 2:45 pm Post subject: |
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Rather than getting too tied up in measurement markings, it's best to look at the sail and see how downhaul affects its shape. Most sail designers craft sails to work well over a general range covering light, medium and strong winds. Downhaul adjustment makes it all a reality.
To give yourself easy adjustment and a very fine tuning capability, get a Chinook winch. It makes achieving the perfect setting a breeze, and you don't have to get down on the ground to do it. |
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PeconicPuffin
Joined: 07 Jun 2004 Posts: 1830
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Posted: Mon Sep 10, 2018 2:58 pm Post subject: |
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swchandler wrote: | To give yourself easy adjustment and a very fine tuning capability, get a Chinook winch. It makes achieving the perfect setting a breeze, and you don't have to get down on the ground to do it. |
Good suggestion. Making tuning easy is a must. If it's hard, you won't make smaller adjustments, and those smaller adjustments can make a real difference. Other ways to make downhauling easier is to learn the threading pattern included in this blog post, and switching your downhaul line to Spectra/formuline. It downhauls much more easily.
http://www.peconicpuffin.com/the_peconic_puffin/2007/03/easier_downhaul.html _________________ Michael
http://www.peconicpuffin.com |
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joethewindsufa
Joined: 10 Oct 2010 Posts: 1190 Location: Montréal
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dhmark
Joined: 04 Sep 2007 Posts: 376
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Posted: Mon Sep 10, 2018 5:12 pm Post subject: |
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That chinook winch has made me such a wimp i even use it to decleat the downhaul when derigging. I dont want to get on the ground, strain my back, rip up my hands.... |
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cgoudie1
Joined: 10 Apr 2006 Posts: 2597 Location: Killer Sturgeon Cove
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Posted: Mon Sep 10, 2018 9:23 pm Post subject: |
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+2
-Craig
swchandler wrote: | Rather than getting too tied up in measurement markings, it's best to look at the sail and see how downhaul affects its shape. Most sail designers craft sails to work well over a general range covering light, medium and strong winds. Downhaul adjustment makes it all a reality.
To give yourself easy adjustment and a very fine tuning capability, get a Chinook winch. It makes achieving the perfect setting a breeze, and you don't have to get down on the ground to do it. |
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