BEND CURVE: NEW-SCHOOL/WAVE VS. CLASSIC/RACEUpdated a year ago

NEW-SCHOOL/WAVE CURVE
On New School shaped booms the curve is concentrated in the first 25-30 cm while the rest of the boom is straight. This means that you don’t need to twist/bent your front hand even on smaller (wave) sails as it's still positioned within the straight part.
 

CLASSIC/RACE CURVE
Classic shaped booms have a curve ranging further back to approx. 45cm. On smaller (wave) sails this means that the front hand is twisted/bent resulting in increased fatigue or even hand-wrist pain.
The larger the sail though the more the draft (and with it your hands) moves back so that the front hand isn't twisted anymore.
Bigger sails also have a deeper profile. Classic shaped booms with their curve ranging further back make the boom become wider in the middle avoiding the sail touching the boom.
Therefore classic shaped booms are still the first choice for larger sized freeride/slalom sails (6.5 and up).