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Square Top Racing Mainsail
Square Top Mainsails, our most advanced model, dominate Grand Prix racing worldwide. The square top profile provides highly efficient progressive twist, reduced mast tip vortex and optimized sail area distribution. North designers precisely balance sail camber with head width while accounting for specific mast bend characteristics and target sailing conditions. All sail elements work together, including membrane modulus, batten stiffness, and batten configuration – resulting in finely controlled airfoil performance.
- Rule Optimized Roach Profile
- Optimized Gaff Batten Angle
- 1 or more Full Length Battens
- RBS E-Glass Tapered Battens*
- Exclusive Tie in Batten Adjusters
- Hard Braid Luff Rope
- Adjustable Leech and Foot Cords
- Loose Foot with Integral Foot Shelf
- Exclusive Teardrop Corner Reinforcements
- Stainless Steel Rings
- Racing Trim Stripes
- Nylon Twist (Leech) Telltales
- Yarn Flow (Horizontal) Telltales
- Class Insignia
- Sail Numbers and Country Code
- Certified Measurement
- Drawstring Sail Bag
- Reef Points
- Carbon Battens
- Simple Luff Slides
- Custom Luff & Batten Car Systems
- Overhead Leech Cord
- Spreader Tip Patches
- Custom Graphics