Erez,
The question is:
Is the bridle foil there because the designer wanted a big Jib?
If yes,
Ones I reduce the sail area of the jib, the bridle foil is not necessary???
Unfortunately I can not answer the structural need for the bridal foil. The 5.5 began life as a Uni so
possibly was not engineered to take the stress pulling the bows together, and the bridal foil was the answer. Or maybe it was just to put the jib lower to get more jib sail area. The safest route would be to keep the foil, but there have been many Nacra Uni's that have had spinnakers put on which probably put a lot more force on the front hulls than the jib, and I have never heard of a failure, so it might be safe. The Nacra's are built fairly tough. My
guess is the mast would fail before a hull if the spinnaker was overstressed.
