>From the North j/80 tuning guide, this should give you an idea of the ratios. Use the main halyard to the chain plates to make sure you're getting the mast centered in the boat.
Slack off the lowers and intermediates, tighten the cap shrouds so they are hand tight. Measuring with the main halyard to the chain plates chec k that the mast is straight in the boat by. Adjust as necessary. 2) Next, vang the backstay on so the caps go loose. Tighten them with equal turns on both port and starboard until they are again hand tight. Slack the backstay and measure the tension in the caps with a LOOS B gauge. Adjust until you hit 28 on the gauge. 3) Tighten the lowers again with e qual turns, looking up all the time too make sure the mast stays in column. Tighten so that they measure 20 on th e LOOS B gauge. This will give pre-bend of 30cm 4) Tighten the intermediates so that they measure 18 on the LOOS gauge. 5) Follow the Quick Tuning Gu ide for further reference. This is the medium wind set-up and makes sure that the forestay sags 8cm when going to windward. In lighter winds the lowers shou ld be eased a turn to give th e forestay a little extra sag. Conversely, in winds over 16 knots the lowers are tigh tened somewhat to give le ss sag. -- Andrew Burton 61 W Narragansett Ave Newport, RI USA 02840 http://sites.google.com/site/andrewburtonyachtservices/ phone +401 965 5260
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