Racing Downwind Sails

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Racing Downwind Sails

These sails are legendary for their performance. Using sophisticated design tools for off-wind sail development, wind tunnel testing, and the expertise of designers, technologists and manufacturing experts from industry and academia, Quantum’s racing spinnakers have been developed to provide downwind power for every type of racing situation. 

Designed for Performance, Built to Last

All spinnakers feature multi-panel, tri-radial construction for accurate, 3D shaping, smooth flying shape, and precise alignment of loads. Only the highest quality nylon, polyester and laminate spinnaker materials are used, and attention to construction details ensures rugged durability and dependability. 

 

Standard Features

  • Corner reinforcements are spray-glued for maximum bonding area and smoothness
  • Narrow head gores reduce diagonal load on seams
  • Fanned radial patches distribute loads and minimize weight at corners
  • Graphics can be applied using different methods and materials depending on the design, usage and budget

All spinnakers include leech and foot control lines and sail bag.

Racing Spinnakers by Apparent Wind Angle

Racing spinnakers are designed for specific apparent wind angles (AWA). The polar charts depict downwind travel from the stern to the bow of the boat using our asymmetrical and symmetrical spinnakers. Click on a spinnaker name for product description.

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Symmetrical Spinnaker Polar Chart

symmetrical Polar Chart

SYMMETRICAL TWS/TWA IN KNOTS
S1 - Code 1 VMG Light-air Spinnaker 0 - 15 / 50 - 125
S2 - Code 2 AP Running Spinnaker 0 - 10 / 70 - 110
S3 - Code 3 AP Reaching Spinnaker 10 - 20 / 100 - 145
S4 - Code 4 Heavy Running Spinnaker 8 - 20 / 65 - 135
Symmetrical Spinnaker Polar Chart
 
S1 - Code 1 VMG Light-air Spinnaker
Features
  • Multi-panel, tri-radial design allows for more precise alignment of loads.
  • Increased number of panels enables the use of 3D shaping.
  • Creates a smooth flying shape.
  • Corner reinforcements are spray glued for maximum bonding area and smoothness.
  • Narrow head gores reduce diagonal load on seams.
  • Fanned radial patches minimize weight at corners.
  • Leech cords are standard.
S2 - Code 2 AP Running Spinnaker
Features
  • Multi-panel, tri-radial design allows for more precise alignment of loads.
  • Increased number of panels enables the use of 3D shaping.
  • Creates a smooth flying shape.
  • Corner reinforcements are spray glued for maximum bonding area and smoothness.
  • Narrow head gores reduce diagonal load on seams.
  • Fanned radial patches minimize weight at corners.
  • Leech cords are standard.
S3 - Code 3 AP Reaching Spinnaker
Features
  • Multi-panel, tri-radial design allows for more precise alignment of loads.
  • Increased number of panels enables the use of 3D shaping.
  • Creates a smooth flying shape.
  • Corner reinforcements are spray glued for maximum bonding area and smoothness.
  • Narrow head gores reduce diagonal load on seams.
  • Fanned radial patches minimize weight at corners.
  • Leech cords are standard.
S4 - Code 4 Heavy Running Spinnaker
Features
  • Multi-panel, tri-radial design allows for more precise alignment of loads.
  • Increased number of panels enables the use of 3D shaping.
  • Creates a smooth flying shape.
  • Corner reinforcements are spray glued for maximum bonding area and smoothness.
  • Narrow head gores reduce diagonal load on seams.
  • Fanned radial patches minimize weight at corners.
  • Leech cords are standard.

 

 

Asymmetrical Spinnaker Polar Chart

asymmetrical Polar Chart

ASYMMETRICAL TWS/TWA IN KNOTS
A0 - Close Reaching 0 - 15 / 50 - 125
A1 - VMG Light-air 0 - 10 / 70 - 110
A2 - AP Running 10 - 20 / 100 - 145
A3 - AP Reaching 8 - 20 / 65 - 135
A4 - Heavy Running 18 - 30 / 125 - 170
A5 - Heavy Reaching 15 - 25 / 60 - 130
Asymmetrical Spinnaker Polar Chart
 
A0 - Close Reaching
Features
  • Excellent light air performance; the choice for light-to-moderate air close reaching. Generally referred to as the Code Zero.
  • Genoa-like shape.
  • Can be used on a furler.
  • Leech length 90% of luff.
  • 70% of maximum area and 40% larger than a genoa.
  • TWA of 70-130, AWA of 30-10° depending on girth and velocity.
  • Critical for the newest swept-back-spreader rigs with non-overlapping jibs.
  • Foot length typically 168% of SPL, Mid-girth 75% of foot or smaller if rule allows.
A1 - VMG Light-air
Features
  • Designed as a light to moderate air running sail.
  • Slightly smaller and flatter in the head sections to optimize light air performance.
  • Flatter, specialized shape for light air tacking angles.
  • 100% of maximum area.
  • TWA 100-150 degrees, AWA of 70-120°.
  • Foot length 180% of SPL.
  • Mid-girth typically 90-95% of foot.
  • Leech length 87-90% of luff.
A2 - AP Running
Features
  • Designed as a light to moderate air running sail.
  • Full, powerful sections for running.
  • TWA 130-160 degrees, AWA of 90-145°.
  • Foot Length 180% of SPL.
  • Mid girth 100% of foot or bigger if rule allows.
  • Leech length 87-90% of luff.
A3 - AP Reaching
Features
  • A full sized reaching asymmetrical, best choice when adding an asymmetrical to an existing inventory.
  • As close to an all-purpose sail as possible.
  • Designed for the middle range of reaching angles in moderate breeze. As a full-sized sail, it is capable of working effectively at broader angles.
  • 100% of maximum area.
  • TWA 100-150 degrees, AWA of 80-140°.
  • Foot Length 180% of J.
  • Mid girth 100% of foot or bigger if rule allows.
  • Leech length 87% of luff.
A4 - Heavy Running
Features
  • A full-sized, maximum-power running asymmetrical.
  • 100% of maximum area.
  • Optimized shaping and structure for moderate to heavy air running, typically used in 18-30+ knots of true wind.
  • TWA 150-180 degrees, AWA of 120-165°.
  • Foot Length 180% of SPL.
  • Mid-girth typically 100% of foot or larger is class rules allow.
  • Leech length 87-90% of luff.
  • Full, powerful sections for running.
  • Additional reinforcing and plying for high loads.
A5 - Heavy Reaching
Features
  • Reacher shape. Designed for moderate-air close reaching and heavy-air reaching at broader angles when maximum area is too much.
  • Emphasis on flat, well-twisted shapes with straight exits to reduce heel angle and maximize performance. Balanced, forgiving entry for trimming ease.
  • Works reasonably well in light air at very close angles when an A0 is not available.
  • 90% of maximum area.
  • TWA 90-160 degrees, AWA 80-150°.
  • Foot length 180% of J.
  • Mid girth 85%-95% of foot depending on aspect ratio.
  • Leech length 88% of luff.
A6 - Fractional Reaching
Features
  • A slightly reduced, maximum power running asymmetrical, for use with the pole well-squared.
  • Optimized shaping and structure for heavy air running, typically used in 25+ knots of true wind.
  • Full, powerful sections for running.
  • Additional reinforcing, plying, and extra-heavy construction for maximum loading
  • 100% of maximum area.
  • TWA 150-180 degrees, AWA of 120-165°.
  • Foot Length 180% of SPL.
  • Mid girth typically 90-95% of foot.
  • Leech length 87-90% of luff.