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J70 Sailboat Parts and Equipment at

J70 Sailboat Parts and Equipment

Class Description

The J/70 introduces a new dimension of fun, fast sailing in a stable, easy to own boat. A natural evolution of its J pedigree, the J/70's 22-foot long waterline with high aspect, all carbon rig and deep, lifting bulb keel provides spirited performance and stability that feels like a much larger boat.

Knifing through the water upwind with confidence and ease, the J/70 has that legendary “J” feel - light, controllable with a wide-groove to sail consistently fast. With an adjustable cascading backstay, one has total control over sail shape and dynamic rig tension across the full range of conditions, making it not only easy to change gears on the J/70, but faster and safer.



Backstay System

Backstay Bridle
The soft backstay used by the J70 allows for minimal weight aloft. The Backstay uses 6mm dyneema single braid spliced onto a low friction ring. The backstay bridle is also a 6mm dyneema line with a sling splice and ball. This allows the backstay to be adjusted in varying wind conditions. As the wind increases, the bridle should be tensioned to remove any excess slack. We recommend using a bridle with a sling splice on both ends that extends to a length of 15'10".

Backstay Control
The Backstay is controlled using a triple configuration of Harken 29mm T2 Blocks, all tied together. The line is led to the deck through a 29mm fixed block and through a 29mm cheek block. The control line terminates through a micro cam cleat with fairlead.




The traveler system on the J70 uses a high beam 1.2m 22mm traveler track. The recommended traveler car is a Harken Small Boat CB car with a stand up toggle. The traveler line runs through 2 fixed 29mm carbo blocks and terminates through a micro cam cleat with fairlead. This creates a simple 2:1 purchase for the driver. We recommend using a light 5mm continuous line to make breaking the leeward cleat easier.




Mainsheet System
The J70 Mainsheet can be configured numerous ways, but class rules allow a minimum purchase of 4:1 and a maximum purchase of 6:1. We recommend using a system that will allow you to adjust from a 6:1 purchase to a 5:1 purchase on the water. You will need to use a 57mm double block with a suspended 40mm T2 loop block. Use the 5:1 purchase in light air and switch to the 6:1 purhcase when the breeze comes on. We recommend using a tapered 8mm line for your mainsheet.





Jib System
Jib trim on the J70 is one of the most critical and difficult tasks while sailing upwind. Adding an extra cleat facing outboard to each side will allow you to trim maintain jib trim from the rail. We recommend using risers under the cleat to keep the sheet from slipping. The jib sheet is rigged as a 2:1 purchase, which allows controlled sheeting of the jib in a wide range.

For better control, we recommend splicing 2 40mm T2 Blocks together using a single braid dyneema line. Put the line through the clew on the sail and create a secure luggage tag hitch.



Jib Fine Tune

The Jib Halyard Fine Tune on a J70 adds a crucial element to your upwind settings. By using a 4:1 purchase, the fine tune is led through 2 40mm T2 airblocks and 1 29mm T2 air blocks. You control the tension through a swivel cleat attached to the mast.

With this system, the luff tension on your Jib can be adjusted quickly through the puffs. Set your halyard at the minimum setting for the lulls. As the breeze increases in the puffs, add tension to the luff to help bring the draft forward in the sail, as well as give you a better angle of attack against the wind. Constantly 'changing gears' will give you the edge you need to excel.




J70 Sailboat Parts and Equipment

We at Layline strive to be your source for J70 Sailboat Parts and Equipment and all sailboat hardware, rigging, and sailing gear. With our focus on one design and handicap racing we can offer advice and reviews of what you need to compete. If you need any assistance selecting the appropriate J70 Sailboat Parts and Equipment please contact us. Our crew is ready to help!
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