Tuesday, 18 August 2009

New S Boom Profile

Neil Pryde have release a new range of booms for 2010 with many new features including an S profile in the arms.

"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.

The X9 feature new
box section tails that
increse in width in the
larger boom sizes.


  1. Yeah nice boom!!! I will get the new X9 160-220 as a guaranty boom back. Hope it to arrive soon, because my spare boom is also broken.

    @ this moment I have got a X9 145-195 from the Kater shop, but it is quite short & used... Looks very weird a 145-195 with trim system and harnasslines on the middle of the carbon tube when not in use.

    I like the concept, probaly it will push the profile even further forward= always better than backwards.



  2. Yeaah they do look nice, would be good if it perfectly neutralized the draft movement by extending exactly the required amount.
    Alby sent me this great link to the designer? explaining the processes used(pressure forming etc) and the new features of the 2010 booms.
    Cheers, Tim.