Dacron Crosscut Race Mainsail

- Premium Firm Finish Race Dacron

- Crosscut Panel Layout

- Custom Tapered Battens

- Vision and Spreader Window

- Bolt Rope

Why Crosscut?
The Ullman Sails J/70 mainsail uses a crosscut panel layout to improve the sails ability to twist, ultimately making the sail easier to adjust and trim according to the conditions.  This has proven successful in many of our one design development programs, most notably with the Melges 24 Dacron “Shark” mainsail - Samuel "Shark" Kahn won the 2003 Melges 24 World Championships at age 14. (The M24 Shark mainsail also powered the 2005 and 2007 World Championship teams!).

Mainsail delivered with class royalty, class logo, sail numbers, spectra clew strap, telltales and roll bag

Available Upgrades:  Reef, Luff Slides

- Request A Quote -

Dacron Tri-Radial AP Race Jib

- Premium Firm Finish Square Race Dacron

- Radial Panel Design

- Zipper Luff

- Custom Tapered Battens

- Vision Window

Why Tri-Radial?

Performance through the Wind Range
Our tri-radial race jib is cut to take advantage of the low stretch of the Square Dacron cloth bias in an all-purpose headsail.  The result is a jib that doesn’t stretch, keeping the sail flat as the wind speed increases.

The combination of a radial panels and Square Dacron is essential give the sail the durability needed for a Dacron furling headsail.



AirX 650 AP Class Spinnaker

Designed to Perform
The Ullman Sails J/70 spinnaker is designed with a powerful flying shape that is easy to trim and performs across all wind angles.

Cloth Matters
The sail is built using AirX650, a preferred high performance nylon that has proven to hold its shape and firmness throughout a season on the racecourse.

Spinnaker delivered with class royalty, adjustable luff, foot and leech cords, and fold bag.

Available Upgrade:  Vision Window


- Request A Quote -


Ullman Sails

Click HERE for our J/70 Racing Guide

Click HERE for our quick reference J/70 Tuning Chart

Video Discussion:  TUNING & RACING THE J/70
with David Ullman and Erik Shampain

Technical Questions? Ask an Ullman Sails J/70 Expert


All of our one design sails are are developed and refined through an extensive sail testing program that involves time on the water and on the sail loft floor. The collaboration between our design team and top competiors ensures that our sails perform through the wind range, giving our customer's an edge on the racecourse.

"In one design the goal is to have an all purpose sail inventory that is powerful in light breeze and low drag in heavy air."

 - David Ullman, President and Head Designer

Check out the latest J/70 sail development session based in Newport Beach, California with David Ullman, President and Head Designer, and Erik Shampain, One Design Specialist from Ullman Sails Newport Beach.  Video credits to the talented KMag at Ullman Sails Newport Beach.




J/Boats Website

J/70 Association Class Rules

Sailing World Magazine - 2012 Boat Review


 Need more information? Contact your local Ullman Sails loft 

18 Footer2.4 MeterA ClassCal 20Capri 22
EtchellsFlying DutchmanFlying ScotFlying Tiger 10Formula 18
Lido 14Melges 24MercuryNaples SabotOptimist
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