I understand the Nacra 20 is supposed to have a pole length of about 144". With the tack block around 143".
It seems that it's hard to get adequate luff tension on an OD spinnaker. Should I make my pole a little longer? Any anyone know by how much?
Just lower the pole by shortening the end-pole bridles. As mentioned earlier, you will also reduce the stress on the pole by no longer using the welded forestay hoop for it. Replace that with a short loop of line tied to that hoop and two more mid-pole bridles out to the forestay bridle tangs on the hull. You can make all of these lines out of vectran and save on the cost of custom steel wires (and you can adjust the lengths).
