I found the CLR using thin cardboard this time around, and things worked out a lot better. I drew up 6 new sail variations that can be found here with the updated CLR and 9% lead marked.

I noticed some interesting things between all of the different variations I drew up.

1st) 30% chord no lead obstructs my keel bolts, so thats out unfortunately. 

2) No lead 25% chord has almost the same mast position as 30% chord 4.5% lead

3) 30% chord 9% lead has almost the same mast position as 25% chord 4.5% lead and I predict a similar position to 20% chord no lead.

Now for more questions......

Why does Van Loan say to use as little balance as possible and to not go above 25% chord?

Van Loan also says to use a lead between .01 and .1, so .045 or 4.5% lead should work right?

If I were to use 25% chord at 4.5% lead, and experience weather or lee helm, I should be able to balance the boat better by moving the sail fore or aft. Is this correct?

I plan on using cambered full panels, so I won't gain any potential slot effect, but the sail will pull harder then a flat sail. Following this train of thought, since poppy had 30% balance, no lead and got away with it using slot effect, a more conservative 4.5% lead with 25% balance should be able to be realized. Is there any truth to this?

Thanks for all the help so far. I would like to avoid a raked mast if possible, but I may draw some up and add them later.

I guess in closing of these drawings 25% chord with 4.5% lead is my ideal sail plan at this point. If this plan will work and sail nicely this is the route I wish to go.

James Hleba wrote:

http://www.junkrigassociation.org/Sys/PublicProfile/2773509/Photo/2321821/48169454/0

Here is the sail plan Arne drew up for me. It looks good, and if I can not figure out how to get the mast a bit further back this is probably what I will go with, since Arne has laid out such a nice step by step system. 

I have two main issues with this sail plan:

1) The mast interferes with my v birth (our bed) and hatch

2) The mast is 5ft taller than I would like.

Both of these things I am willing to sacrifice at the end of the day, but would love to avoid. I am going to re-test my clr tonight to find out where it should really be and fix my plans.

Is lead necessary for large cambered balanced rig? As far as installation and best placement goes, the picture I drew is accurate, and that is my ideal mast location. From those with experience, do you think there is any way I am going to be able to make a plan with a 30 ft mast above partners, mast placed aft of the hatch, and still have a boat that will sail well? Obviously I do not want the mast in a location that will encourage lee or weather helm.

Thanks for all the help so far, and I will get back after I re-check my clr an make adjustments.

http://www.junkrigassociation.org/Sys/PublicProfile/2773509/Photo/2321821/48169454/0

Here is the sail plan Arne drew up for me. It looks good, and if I can not figure out how to get the mast a bit further back this is probably what I will go with, since Arne has laid out such a nice step by step system. 

I have two main issues with this sail plan:

1) The mast interferes with my v birth (our bed) and hatch

2) The mast is 5ft taller than I would like.

Both of these things I am willing to sacrifice at the end of the day, but would love to avoid. I am going to re-test my clr tonight to find out where it should really be and fix my plans.

Is lead necessary for large cambered balanced rig? As far as installation and best placement goes, the picture I drew is accurate, and that is my ideal mast location. From those with experience, do you think there is any way I am going to be able to make a plan with a 30 ft mast above partners, mast placed aft of the hatch, and still have a boat that will sail well? Obviously I do not want the mast in a location that will encourage lee or weather helm.

Thanks for all the help so far, and I will get back after I re-check my clr an make adjustments.

I have not done any calculations on this, just following my empirical nose developed from 50 years of boat obsessions, but it seems to me the CE is too far aft.  I'd hazard a guess that it needs to move forward by about two feet.  I think that hatch is still at risk!  Relocating it, using plywood, epoxy and glass cloth, however, is not a such an impossible task.  On the other hand, I think the drawing that Arne did, showing the mast just forward of the hatch with the mast position at  5 - 10% of the chord, is the best option so far, other than sacrificing the hatch.  I also think, from my own experience sailing Arion, that this type of sail profile works very well, though that is not to denigrate other types of junk sail.  The balance is the main issue.

Karlis

you are right - I was rather dozily measuring to the mast. There is no lead at all.

My only excuse is I only had the hull in view!

Anyhow, here's where I calculate the CLR to lie.