"The clock has long been ticking for conventional boom design, and that’s because the performance has been held hostage by simple physics. It’s simpler eally; as wind pressure increases, a straight or convex boom effectively becomes shorter as it bends in response to increasing sail load, making the sail fuller, less efficient and harder to manage.(Ask your forearms, they’ve been putting up with it for years). Everybody make way for the new convention; the ‘S’ profile boom. The unique shape commands the sail to retain its shape and length whatever the breeze, providing a more stable andpredictable delivery, and more useable power. The ‘S’ profile is standard this season acrossthe entire NeilPryde range, so everyone can get their hands on it."
I am sure that this will help when loaded up on a slalom course with high apparent wind but I kinda like the boom arms giving way slightly and giving the sail more depth when going deep off the wind, a bit of natural nos. I am told it is only 10mm or so that the boom varies from a conventional profile and with the new race and slalom sails requiring more outhaul and clearance from the boom this should not compromise tuning. However the boom may touch more sail on older sails when bagged such as the RSR. I am looking forward to checking them out when they arrive in the shops.
box section tails that
increse in width in the
larger boom sizes.