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Control Tweaking

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Paramedic View Drop Down
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Post Options Post Options   Quote Paramedic Quote  Post ReplyReply Direct Link To This Post Posted: 08 Apr 12 at 10:07pm
It just feels "right"
 
There's no other way to describe it. You'll have a nice clean looking sail, no horrible creases, reasonably tight leech and it'll feel neutral on the helm and connected to the water.
 
If you feel like you're sailing a bucking bronco you have something wrong.
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NickM View Drop Down
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Post Options Post Options   Quote NickM Quote  Post ReplyReply Direct Link To This Post Posted: 08 Apr 12 at 11:16pm
Originally posted by kurio99

For my initial settings for a dinghy, correct me if I am wrong...

Cunningham - Force 1 - loose with some wrinkling
                      Force 5 - tight as possible
Outhaul - Force 1 - loose with some wrinkling
               Force 5 - tight as possible
Vang (off-wind) - Force 1 - loose
      Force 5 - tight as possible
Vang (up-wind) - Force 1 - requires tuning
      Force 5 - tight as possible
 
In general terms, yes, but it depends on the boat.  For example, in very light airs you might be better off with a flatter sail so that the air flow is not "stalled" by the bag in the sail, so maybe the outhaul will need to be tightened a bit. For your "initial settings" I suggest you check out the tuning guide for your class or a popular class sailmaker.
 
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Post Options Post Options   Quote RS400atC Quote  Post ReplyReply Direct Link To This Post Posted: 09 Apr 12 at 4:48pm
Go to an open meeting or better still coaching day. Having a dozen boats to compare speed with is much better than your usual 2 or 3 at your home club.
Look at other people's boats. Take photo's perhaps.
Two baot tuning does work really well, but you need a fairly steady breeze, not swirling around the trees and nonsense.
You want to be trying to work with the settings used by the good guys, not just some bloke in your club who does a bit better than you. He may be mostly beating you by compass work or local knowledge rather than actual speed through the water.
Don't obsess with minor controls to the exclusion of the mainsheet and boat balance (note to self...)
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Post Options Post Options   Quote NorthernMonkey Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 12 at 1:04pm

In addition to 2 (or more) boat training, open meetings and coaching, which are well worth getting involved in, try this, it's very visual.  

Set your boat up on land in a suitable breeze. Not to windy or the boat may blow over. Attach a piece of shock cord to the end of the boom and to the transom somewhere. The shock cord should be partially stretched when the sail is 'set' on a the point of sailing that you are interested in. 

Now try pulling (and easing) things. Outhaul, cunningham, vang and even the jibsheet. You will notice that the boom will move both in and out. If the boom moves closer to the centreline of the boat, the 'power' of the rig will have been reduced. If the boom moves out the power of the rig will be increased, causing the shock cord to stretch more. There are occasions when you will want to add power and decrease power on all points of sailing. This technique is very visual and will let you see first hand what is happening. One of the most surprising things to observe is the effect the jib has over the power of the whole rig. Not just sheet tension, but halyard too. 

Try it. It even works when the wind isn't constant. You will see the effect immediately.

EDIT: Use the advice given above and in various books as the basis for these trials. They are all correct, but all classes, rigs and sailplans will react with with varying results to each control.




Edited by NorthernMonkey - 10 Apr 12 at 1:31pm
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kurio99 View Drop Down
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Post Options Post Options   Quote kurio99 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 12 at 2:56pm
Originally posted by NorthernMonkey

 
Set your boat up on land in a suitable breeze.
 
 
That's brilliant!  Smile  You can really finetune the settings without the complexity of waves and boat heeling.  I could even run a wind gauge for real wind speeds for the different settings.  As you say, this works best with lighter breezes, since you don't want your boat tumbling across the park. Wink
 
 
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Post Options Post Options   Quote ham4sand Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 12 at 10:15pm
on the topic of controls, whats a nice splicable control line that could be used for kicker? john
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TomB View Drop Down
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Post Options Post Options   Quote TomB Quote  Post ReplyReply Direct Link To This Post Posted: 11 Apr 12 at 8:44am
Originally posted by ham4sand

on the topic of controls, whats a nice splicable control line that could be used for kicker? john
 we use a excel racing pro 4mm. we taper and then end to end splice

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