Bill asks: Any opinions on projected performance between the two sails? (I had to ask)

Modesty (and prudence) will probably preclude a reply from either of the designers, so I will venture the following: without carefully conducted matched trials I doubt if the question could be answered - and even then I doubt if there would be a clear cut difference. The one with lower aspect ratio and longer boom might be (very slightly) more of a handful down-wind than the other - but in either case one would expect the helm to be a bit "hard mouthed" if over-canvassed when broad-reaching and running down wind - this is inevitable with a low balance cat rigged dinghy in a bit too much wind. (In that situation you'll soon learn to reduce sail a little when necessary, and raise the centreboard a little or tilt it aft if you can - - then sit right at the back and hang on tight!)

Four different panels need to be individually lofted for the 7-panel Johanna sail (DIY well -documented by Arne) -  and five different panels lofted for Paul's 5-panel sail (not quite so simple to loft, though I dare say for a fee Paul will provide computer-generated patterns).

I would make the comparison on two other matters, rather than "performance":

(1) aesthetics. That's in the eye of the beholder.

(2) running rigging requirements. I would be interested to know what each of the designers proposes in the way of sheeting system, and the suite of sail-adjusting parrels. I suspect these things can only be finally decided after a little experimentation and tuning, but I suppose each of the designers would be able to make some initial suggestions and it might be interesting to compare them.

Hmmm, thanks for checking this. Well, if the hull is 3 feet longer than it probably won't fit that sail... I'll run it by Paul.

The drawing I gave both of you is the same and based on my measurements. Actually, in my drawing, the LOA is 16.583, measured from my boat. I've checked all these measurements a bizillion times :) 

Any opinions on projected performance between the two sails? (I had to ask)

*I just checked the measurements against my drawing, and yes, indeed Paul's are off, and your measurements are the same as mine. 

Here's Paul's sail design for my boat. I put it next to Arne's so we can see them side by side. Thoughts? 

Bill,

my experience is that time is running terribly fast when one is to start a rigging project.
Since there is no weather for out-door work these days (too cold anyway for gluing), I suggest you start with the sail, which is typical indoor work.
When you have decided on sail to use, you need to collect some canvas to make it from (around 3oz.), webbing and paper for lofting the sail. In case you choose to make the last sail I suggested, the one with B = 3.15m, then you need to draw it up in detail. This sail is based on a standard Johanna70 master sail with AR = 1.85..

• ·         I suggest you download and print out Chapter 4 and 5 of TCPJR , found here, where the master sails sit..
• ·         You need two printouts of Sheet 1 and Sheet 2 of that AR= 1.85 master sail.
• ·         All the dimensions on sheet 2 must be scaled down, using scale factor F_l = 0.620429.  I write the result in mm-resolution, but I am plenty happy if I manage to cut and sew with centimetre accuracy (1cm = 10mm)
• ·         The other Sheet 2 can be used to produce “Sheet 3”, with the Round added for generating camber in the sail. The numbers needed can be found if Fig 4.5.
• ·         One of the printed out Sheet 1 can be used for planning the batten pocket, turning it into Sheet 4.
• ·         Sourcing sailcloth and webbing takes time, start now.
• ·         Floor space for lofting the sail needs only be big enough to let you loft one panel at a time. The sail for my Ingeborg was lofted and sewn together in my cramped living room. Unfortunately, a 43-photo album, showing the sewing process in detail, has been lost by Apricot (along with 200 more photos). I could rebuild that album, but it is quite some work, and I am afraid they will just get lost again.
• ·         If you haven’t used a sewing machine before, that sounds like a daunting obstacle. However, sewing a junk sail, using Amateur method B, is much easier than sewing clothes, or real, western sails. If you can saw along a line with a bandsaw, then you will soon be able to sew alone a line as well.

I suggest you read those two chapters (4 and 5) carefully and take notes before you start.

Good luck! 

Arne

The boat is currently a day sailer.

If you were to put Arne’s rig in it and do some day-sailing next summer you would probably be making a good start.

If that doesn’t appeal, you could go ahead straight away and increase the size of the cuddy somewhat, as you have planned, give it the rig Arne suggests, make a secure compartment below the floorboards for carrying heavy stores, a place to stow a tent or canopy, somewhere for sleeping bag, cooking utensils etc etc - and then I think you would have a pretty good camper-cruiser.  Careful placement of reserve buoyancy will add to your confidence. It will enable extended cruising if you watch the weather. Once out on the water you will be able to push the boundaries a bit and judge for yourself what the limitations are. You won’t be lacking opportunities to experience stressful situations. That’s as far as you can take that hull, in my opinion – but it’s a very long way from merely a junk rig conversion, and a very long way from merely day sailing.

The rig will be good, but in my opinion, ultimately you will find that the hull is not ideal for “…potentially nasty environments for long periods of time…” 

But it will be a good enough platform for preparing yourself and planning for that.

In other words (your own): 

"...I see this boat as a training ground for the next boat... ...So, it's worth it to put in a little extra effort to make the boat something a bit more capable than the fair-weather daysailer - the comfort in knowing that I can push her (and myself) in ways that foster slightly more significant mistakes and learnings than one would assume from a typical open dinghy..." 

Best of luck with your project.