C-Series Roller-Furling Gennakers™
Roller-furling Gennakers for racing and cruising boats


North’s new C-Series Gennakers combine superior close-winded reaching power with the convenience and easy handling of roller furling. Descended from tight reaching asymmetrics used by Volvo Ocean Race and Open 60 competitors, C-Series Gennakers are a more user-friendly version designed specifically for cruisers without the restrictions of handicap or racing rules. They have been refined using the University of Auckland Twisted Flow Wind Tunnel and North’s remarkable Virtual Wind Tunnel™ downwind flow simulation software. The result is an easy-flying Gennaker series that will boost your reaching performance when apparent wind is forward of the beam.

C-Series asymmetrics feature North TrueRadial™ construction, which shapes spinnaker panels on two axes for a smoother profile both vertically and horizontally.

Your North Sails representative will assist you in selecting the roller furling system best suited for your boat, budget and sailing style.

Product Highlights
  • Three distinct asymmetric models
  • Choice of lightweight Nylon or Polyester spinnaker fabrics
  • Developed using the University of Auckland Twisted Flow Wind Tunnel and North Virtual Wind Tunnel™ flow simulation software for maximum power and minimum drag
Which North downwind sail is right for you?
Click to view NORTH DOWNWIND SAIL PERFORMANCE GUIDE


Your North representative will help you choose the best furling system for your boat, budget and sailing style.



North's Virtual Wind Tunnel flow simulation software is the first in the world to successfully model downwind air flow in a computer.
C-Series Roller Furling Gennakers
  • Lightweight nylon or polyester sailcloth in a variety of colors
  • TrueRadial™ construction
  • Wind Tunnel Optimized Design
  • Computer molded using North proprietary software
  • Stainless steel corner rings with strap reinforcement
  • Adjustable Dyneema leech, luff and  foot cords
  • North box turtle sailbag
C-Series Roller Furling Gennaker Options
  • Additional belly section for symmetry in colors
  • Non-standard color layout
  • Step up construction
  • Sail numbers
  • Country code
  • Certified measurement
  • SailKote Plus
  • Custom artwork and graphics available through North Sails Graphics




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