by Merlin » Thu Aug 25, 2016 7:23 pm
I too have been experimenting with adjustable shrouds, just like Cliff and Gavin. However, I have been down the one string route. There seems to be some confusion about a one string system and to say it will open the door to greater innovation is incorrect. There is nothing to add to the system; the kicker system remains static whatever the rake, and therefore rules itself out for incorporation. The lowers both Cliff and I agree do not require adjustment if the shrouds are adjustable. In short there is nothing to add.
I have conducted tests of my one string system, and I am satisfied subject to further testing and refinement it will be of advantage to all, irrespective of ability. (Slightly biased view)
The system Cliff and Gavin are promoting has great merit, being cheaper than a one string system and it appears easier to set up. I do have concerns over the lateral compression when fitted to a Mk1 boat, but this can be negated by increasing the mechanical advantage of the pulley system attached directly to the shrouds from 2 to 1 to 5 to 1. However, this does up the overall cost. The only worry I have is what would be the result if both shroud and forestay adjusters are released inadvertently. The only drawback I can foresee is one of restoring initial settings.
A one string system will be more expensive to fit. However, it will not open Pandora's box to further evolution. It has only two control lines which, like Cliff's system, would only utilise existing cleats (where adjustable lowers are fitted). It should also provide all the non cost benefits Cliff has listed. One continuous control line adjusts the rig tension to the required setting. The second continuous control pulled one way increases rake, and pulled the other way reduces rake. Once the rig tension is set it should remain constant, until such time as the mast bends, either by the lower tension relaxing or kicker tension being increased. This means that the rig tension may not need adjusting and the only adjustment needed would be to pull the rig back up wind and forward downwind. It should Return to the starting point with the original rig tension restored; as long as the kicker is returned its starting tension.
I am of the opinion that the best route is to spend the next year testing out a one string system. Fitting a system with shrouds and forestay adjusted separately, is using old technology, when a popular (in other classes) modern system is slightly more expensive, but carries several advantages as well as doing everything the old technology does.
What is for certain is that continuing to race in high winds with slack rigging is not desirable, particularly on the sea with large waves. However, one has to accept that many fleets sail on lakes where the risks diminish significantly. I don't foresee any speed advantage being derived from any of the three options. I think it has to be judged on the grounds of safety, and convenience.
The 3 options are 1) most obviously, do nothing, 2) test out a cheaper dated system or 3) test out a more expensive modern system. Whatever is decided the Supernova will remain a top quality singlehander that is much admired.