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The final version of the Junk Rig Glossary is now available and can be found under the Junk Information menu, or directly here.  This Glossary lists all the terms related to the junk rig, its implementation and use.

We were formed in the UK, and although our 'office' address and banking remains in the UK we are run by an increasingly international Committee via the Internet. A number of posts become vacant every year, at the AGM, so if you choose to join you could also put your name forward to help run the 'club'. It doesn't run itself. Our membership is now more than   50% outside the UK. Click the chart for detail.

March 2020 - Ingeborg and the Johanna-style Rig

The first two vessels featured in the 2020 series just happened to showcase the SJR (developed by Slieve McGalliard) and the Junk Wingsail rig (developed by David Tyler). So, we asked Arne Kverneland if he would write the third in the series, and introduce the style of rig which he has developed. Arne writes:

My present boat Ingeborg is a 7.9m long Marieholm IF, built in 1974. The boat type had been on my ‘some-day-list’ for decades, and when a refurbished version passed under my nose in 2014, I grabbed it. From 2016 she has been sailing under her new junk rig (JR). To say that I am happy with Ingeborg and her present rig would be an understatement...

Ingeborg’s rig is of the same JR family as those on the three boats I had before; Johanna, Broremann and Frøken Sørensen. It is a slightly modified version of the Hasler-McLeod (HM) rig, shown in Practical Junk Rig (PJR).

I have tried to pile on as big sail area and tall a luff as possible for a given mast height. The sails of the Johanna-style share a number of features:

• Seven panels of equal area, the lower four being identical parallelograms, cut with about 8% camber. 
• The upper panels have progressively less camber.
• All battens and yard of the same length.
• Yard angle 70° and boom rise 10°. 
• The sail is set with the luff and leech vertical, or even with the leech listing a tiny bit aft.
  

The 70° yard lets me set the sail with about 10 – 17% balance, and the luff of the sail goes well above the mast top.  The 10° boom rise ensures good clearance over the sprayhood, which lets me handle the sail without adjusting the topping lifts under way. The vertical leech ensures that there will be next to no sheet-batten tangle when tacking or gybing. I have not done much development work on this rig since Johanna’s JR became operational (2003). I have only done smaller adjustments to the rig type.

To save time when I need to draw up a new Johanna-style rig, I have produced a string of ten master sails with the Aspect Ratio (AR) ranging from 1.80 to 2.25. An important DIY-friendly feature of this rig is the way it is constructed. One only needs floor space for lofting one batten panel at the time, and even the sewing process is quite amateur-friendly. My hope is that the written how-to instructions will encourage many to fit their boats with a junk rig. 

Arne is a prolific writer and contributor, and one of the pioneers of the cambered JR sail. His detailed sail-making designs, manuals and inventions are freely available and may be found here on the technical section of this website.

Our Boat of the Month Archive is here.