Sails Radial or Tape drive
I am going to buy a new mainsail for my Elan 40, mainly for club racing, solo races, and some more important races ocasionally. I had withthe boat the original sails 2002. I Switch my head sail already for the regatas by a UK tapedrive Pentex base, and kept the original for cruising. Now after mesuring the main I saw that the sail is small....so I decided to switch it and I have two questions.
1- I am checking basically between Quantum radial Pentex sail and UK Tape drive Pentex sail. The design will be 1 full batten...maybe two. For what I read the radial sails loose their shape much faster than the Tape drive sails...Is that true ? Are the sails similar or there is an advantage from one construction type over the other ? UK claims that the sails will keep their shape longer...? Quantum uses different Pentex weights? I guess to coorect the strech problem but does it really work ?
2- The second question is about the E for the main, The E that is marked on the boon is about 7 cm smaller than what the actual sail strectches when flattened. My question is ? Shoul I increase the E on the new sail and get more penalization but a bigger sail , or should I kept the original E and make the sailmaker work in the new E....
Good sailing !