Doyle Downwind Sails

Doyle’s line of Downwind sails covers a wide range of points of sail and let you make the most out of your boat downwind, crosswind, and even when close reaching. Combining years of practical experience with a highly developed CFD and FEA testing enviroment has resulted in impressive results for Doyle’s Downwind sails in recent years.

We have developed an impressive range of proven sail designs: the design tools are amongst the most advanced 3D modeling and airflow, allowing designers to view how the sails will trim at a range of different angles, as well as how the sails will interact with other sails on the boat.

Specifics such as projected wind range, crossover charts and specifics of an individual sail can be carefully tailored to the program, and then modeled and predicted prior to the sail even being fitted to the boat, ensuring the sails are fast from day one. Additionally, advanced FEA analysis has allowed Doyle to accurately model the loads in downwind sails, allowing them to optimize the cloth in the sails as well.

Doyle Asymmetric Racing Spinnakers


The Code Zero is the smallest asymmetric ORC Regulation sail. This is a special performance sail for racing upwind and on beam reaches. Usually made of triradial Kevlar or Stratis.

  • 40 – 85 AWA
  • 3 – 15 AWS

The A1 is used to enhance VMG with light wind, so they are designed to perform best at beam and broad reaches.

Made of lightweight nylon.

  • 65 – 105 AWA
  • 3 – 12 AWS

The A2 is a full-size gennaker for very broad reaches, and for this reason it is designed with very broad shoulders.

Usually made with light/medium weight nylon.

  • 115 – 160 AWA
  • 8-20 AWS

The A3 is used to sail on beam reaches with medium-light and moderate winds.

Made with medium or medium-heavy nylon.

  • 70 – 120 AWA
  • 5 – 23 AWS

The A4 is designed for sailing on broad reaches with strong winds. Its design and shape make it stable and let the sail fly far from the mailsail.

Made with heavy nylon.

  • 115 – 165 AWA
  • 10 – 25 AWS

The A5 is for sailing on reaches in strong wind so it is narrower at the top than the A3.

Made of heavy nylon or Kevlar or Stratis.

  • 85-130 AWA
  • 16-28 AWS

Doyle Symmetric Racing Spinnakers

The S1 is designed for light conditions that preclude deeper angles. Designed with narrower girths in the upper part of the sail to keep the sail stable, the sail is meant to fly closer to the rig.

  • 60 – 120 AWA
  • 0 – 7 AWS

This sail is designed to be the work horse of any inventory and covers a large range. It has fuller girths and broader shoulders, allowing it to lift and fly away from the boat. The top 10% of the sail being flatter allows the spinnaker to set away from the rig before the body of the sail curves down. The result is a sail that flies out to windward, away from the disturbed air of the mainsail and rig, in clear air flow.

  • 115 – 170 AWA
  • 6 – 128 AWS

This takes the S2 design and flattens it out a bit to allow it to sail tighter angles.

  • 55 – 105 AWA
  • 3 – 20 AWS

This sail is designed to get the boat downwind. It has the fullest girths a sail can fly with. The cross sectional shape of the sail is more elliptical, which increases the projected sail area while maintaining the spinnakers stability.

  • 115 – 170 AWA
  • 16 – 25 AWS

Designed for pole forward reaching conditions, this sail has a flatter shape that allows it to be carried as the breeze increases.

  • 90 – 160 AWA
  • 15 – 35 AWS

Asymmetric Power Cruise

The APC (Asymmetric Power Cruiser) is designed for solo sailors or for very reduced crews. The APC is the latest evolution of the asymmetrical spinnaker, faster than a classic spinnaker and extremely easy to hoist and trim. Because it is so stable, the APC can be raised by one person and flown even while on autopilot

Its air foil and flatter leech decrease heeling and leeway while increasing lift. It can be used even at 60 degrees, and is faster than a spinnaker up to 105 degrees of apparent wind. The adjustable tack lets the sail be used up to 130 degrees and beyond if armed with a pole.

On cruiser-racing boats the APC can be used with very light wind like the A1 for tight reaches to improve VMG downwind, or like the A3 with medium to strong wind. To make maneuvers even simpler, the APC can be used with a sock, to hoist the closed sail and open it by pulling the lines of the circuit inside the sock; the same maneuver is repeated in reverse order when the sail is lowered.

Hylas 70

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