Hall


Spars’ Magic Collar is a rectangular section that is integral to the mast and fits neatly into the deck partners. :


’s


efficient and cost-effective way of building a high-quality spar and this, in turn, contributes to another important Hall Spars characteristic. A further example of combining best practice with an efficient build can be seen in the way the laminate is cured. ‘All our spars are created in a


single cook,’ says Runciman. ‘We do not do stage cook whichmeans we don’t do a partial or pre-heat as you might in the construction of a hull where the processmay start with a 70-degree warmsession before then going to 80 degrees with the final cook at 110. One of the issues with thismulti-stagemethod is that you have tomake sure that the first cook is bonded to the second. Our single cook systemensures that we have a fully consolidated laminate which is another of the factors that helps us to create reliable spars efficiently.’ And the benefits of building on a


male mandrel don’t stop there. The seamless technique means that


80 SEAHORSE


there is little, if any, need for fillers and fairing which further reduces the construction time and the overall weight of the spar. ‘We can save 30 to 40 kilograms


of fairing on an SW105 rig by using our semi-faired system,’ he continues. ‘Imagine a patch area that comprises multiple layers of reinforcement. One layer that's say onemillimetre, then another larger one underneath, and so on, which would create a series of stepped plateaus. Our semi-faired systembridges those small plateaus to achieve the look of a fully faired rig, yet in reality just these specific areas have been faired.’ The benefits of a Hall Spars rig are


not solely down to their proven and efficient construction techniques. Anticipating the future use of the yacht and catering for a spar that can also be adaptable is important to Runciman and his team. ‘We take pride in being able to


anticipate and cater for the different ways in which a yacht may be


mast is stepped in Cape Town. After just a few days of sea trials, she sailed more than 7,500nm non-stop to the Med


operated,’ he says. ‘Sometimes this will be driven by a change of ownership and hence change from say occasional racing to full-time blue water cruising. One example might be a slight change of use that requires a halyard lock. This would require some patching to cater for the additional loads. It’s easy to include this in the original build and might allow a lock to be fitted without unstepping the mast. To put additional patching in afterwards is a bigger and more costly exercise. ‘The backstay configuration is


another example for masts that have a dual role where they can be configured either with topmast runners with a deflector system for racing, or a classic fixed backstay with continuous legs alongside fixed checkstays for cruising. To achieve this the checkstays, which are normally fixed, are removed and replaced by deflectors that are pulled via the existing checkstay tangs and actuated by means of a hydraulic cylinder at the bottom of the mast. When we want to put the runners on, we take the checks away and change the tangs out to allow the dog bone system at the top of the running backstay to form the attachment. This can all be done with the mast in situ and takes a few hours rather than having to take the rig out. As a result, it means that the boat can be more versatile, allowing the owner or skipper to combine a season of


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