Presenting the Tied Hybrid system: can it work?

I’ve been pondering new sails for Tammy Norie for some time. My goals are to increase performance in light winds and improve upwind performance while keeping things simple, strong, and maintainable. I believe that I’ll need to increase sail area and add camber to my sails to achieve this. I’ve briefly described various methods in my earlier post New Sails for Tammy Norie . I had more-or-less settled on an HHH system for simplicity and maintainability.

On Friday I was looking at figure 10.2 from Practical Junk Rig showing how to attach the sail to the yard.

Figure 10.2 from Practical Junk Rig

Figure 10.2 from Practical Junk Rig

Then it struck me: why not attach all the panels to the battens with string? One weekend-long brainstorm later, and I present to you the Tied Hybrid system for Junk Rigs.

Tied Hybrid sketch

Tied Hybrid sketch

The idea is simple: cut the main panels flat with reinforced seams with eyelets. Then tie the panels to the battens with loops of cord. By adjusting the lengths of the loops you can adjust the camber of the sail in pretty much any way you like. Sprung cord locks allow you to do this easily, but you can of course use stopper knots. If the battens are smooth stainless steel tubes then the loops will slip round easily when tacking, flipping the sail camber to the other side.

In addition, it’s a simple matter to make split panels and get a split junk rig with jiblets. It wouldn’t even be very hard to carry both split and full-length panels on a voyage for different conditions. Since all the panels are the same you can get a lot of flexibility.

This is so simple that I have trouble believing that it hasn’t been tried and somehow failed. I’ll be interested in feedback from the members of the Junk Rig Association about that. If it hasn’t been done then I’ll definitely be giving it a go. It should be easy and cheap to construct, and allow for a lot of research into sail trim.

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10 Comments

Filed under Plans, Repairs and Modifications, sail

10 responses to “Presenting the Tied Hybrid system: can it work?

  1. Ingenious, but won’t the gaps between the sections make it less efficient, by letting the pressure out? They might also be a bit noisy, if the wind whistles through them.

    • Yes, gaps are the most obvious drawback, and it could be that air pressure *through* the gaps will force the panels apart and mess up the sail shape too.

  2. Ian Ridsdale

    Great idea !! this sounds VERY interesting !

  3. Steve

    Interesting idea-definitely worth trying. I wouldn’t think the gaps will make any noticeable difference. There may possibly be some wind noise/flapping,but in practice one may well be reefed down if the wind is that strong. I doubt if you’ll notice.
    An interesting project-go for it!

  4. Antoine Maartens

    It looks a mix of Roger Taylor’s implementation on MingMing II and the David Ziegler Trilo junkrig setup. Very clever and a great illustration by the way. What tool do you use for that?

  5. Antoine Maartens

    Thanx for url! Funny to see how we are thinking on the same lines as far as the sail goes. I personally feel that your implementation is briliantly simple. What i do not see is how one could more or less “easily” swap panels – let’s say on top of the Doggers Bank.

    • I’m not really thinking it’d be *that* easy, more like something you’d do in port or at anchor. It’s still a lot easier than changing an entire sail. In an emergency, of course, you might be able to swap a panel on Dogger Bank!

  6. Howard

    Ironically I’ve been toying with exactly the same concept for some time, and share the same airflow concerns others have expressed here. It is definitely worth trying. It would be fun to build a small catamaran like the Rebel Cat just for this sort of experimentation. One could learn a great deal with little investment in materials and labor using painter’s dropcloth or poly tarp. Cost and time result in few true apples to apples comparisons.
    H.W.

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