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Discussion Starter #1 (Edited)
I'm trying to figure out whether my CS 36 Merlin is sailing as well to wind as it should or whether rig tuning/tweaking is necessary. I have the wing keel version, and am running a 155 genny.

If anyone has access to either the polar plot for the boat or some observed tack angles in a variety of wind/wave conditions

Thanks in advance

Lee
CS36 Merlin Emrys
 

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Lee.. I've looked quite a bit to no avail..
One of the downsides of having an uncommon (albeit very nice) boat..

I would say that the boat wants a bit of heel.. If it's light, put someone on the low side.. Makes a big difference...

(I have a fin keel)
 

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Discussion Starter #4
David - you have the fin keel - so it may not be applicable, but what sort of tack angle are you getting in a medium (lets say 10 knots) of breeze in flat seas
 

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90ish

She's not an upwind machine, but my tacking angles are pretty similar to other "furniture boats"

(Based on cruising and light racing over the past 4 years)
 

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I could use GPS tracks, but there's ALWAYS current here, and it's pretty hard to tell from that
 

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Discussion Starter #7
Yup - she certainly isn't a racing machine that is for sure - but its more the angle that interests me rather than the GPS track. Basically compass heading from one tack to the other - that should be more or less the same irrespective of keel - yup - there will be more sideslip on a wing or shoal keel - but the track should be similar as that is more based upon what the sail plan can do
 

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Discussion Starter #8
what I think I'm doing is winding in the headsail too tight and ending up moving the forward force a little too far back, but it is difficult to say and quite frankly my tacking angles aren't very good - I was out in 11 knots and flat seas last week and I would struggle to get even a 100 degrees on the compass

This is with a new headsail so I'm still experimenting, but before I get all grumpy with the sail maker I want to try and see what others are doing and to see whether it is me that needs to do a bit of learning first
 

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If he's a local sailmaker, don't be grumpy.. Take him for a sail. He would probably be happy to.
 

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Discussion Starter #10
Yup - he is local - it is evolution and the story of this genny is long and painful, so he is already in my bad books - how about a recut (on a brand new sail) because it won't sheet correctly, missing spreader patches and then the spreader patches not on the right place.

I'll try a few things this wednesday - see what happens and then it is phone call time
 

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I think 10 -11 kts is a little light to be trying to get inside of 100 degrees. While we can sail at that wind speed our cs doesn't come alive til we get a solid 12. We have a wing keel and can easily get 90 degrees above 12 w/o current. Our 40 really likes to be sailed flat. You may be over trimming and stalling the sails.
Jim
 

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Discussion Starter #12
Thats what I'm wondering - so I'll try sailing a little looser and see what happens. My old CS27 would sail at 90 degrees in anything over 5 knots, especially when flat, but this is a different beastie
 

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My previous 36t, very different from the Merlin, would track higher on the gps when we cracked off a bit.
Jim
 

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I can get into the 40-45 degree true range with my Jeanneau Arcadia. WHile I realize it is a Jeanneau vs a CS. It looks out of the water a hello close to Davids Merlin. We have not had them side by side out of the water, they do look alike, designed by Tony Castro at about the same time. Altho Mine is probably on the more race/cruise end of the spectrum vs the CS in the Cruise/race end of the boat design spectrum. At one time they were literally across from ea other, now he is 30 or so slips closer to land than I am on the same dock.........Not sure how he pulled it off tho, his merlin now looks a lot like a 1d35.....but that is another issue all together.

Have you also made sure the rig is tuned correctly? I got an additional 5-10* and some speed when I went over the rig with a fine tooth comb/tape/loose guage making sure things were aligned.

marty
 

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Discussion Starter #15
The rig is set up pretty well, although I think I need to move the mast tip a little further forward as the weather helm can get a bit heavy when the wind pipes up. I'm going to take the furling apart once the season ends to see if I can shorten the headstay a bit - I'm a bit leary of doing that in the water as I am a little fumble fingered and don't want to hear the tap tap plop sound as a vital bit bounces over the side

The boat has rod rigging and the stays are snug on the lee side in a blow (not bar taught). The mast is in line in these conditions and there is a little prebend (a couple of inches). I have measured and centred the mast.

Any other advice would be helpful

Lee
CS36 Merlin Emrys
 

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For those with CS Merlins, have a peak, and those wanting to see how bad/good David and his son are doing, click the link.....

Watch David and Mark attempt another successful 100 Mile Northern Century race LIVE!!!!

Watch the vessel Kyrie here: Northern Century 2014 - Race Tracker by Swiftsure

Race starts today at 7:30PM PST.. we hope to finish by Sunday morning


Not sure which furler you have, but many can come off with literally 2 bolts being removed. Then working with the forestay is easy. With this in mind, to adjust your forestay forward, if you do not have a turn buckle, but pins as I do, you will have to use both a jib and main halyard to tie off the mast for and aft, loosen the side stays a LOT to pull the mast forward some. A couple of people to help is handy to have. Otherwise with some thought it is pretty easy. This is another thing that helped my boat in handling etc too.

Marty
 
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