usually used on a Code 0 furler. A G-0 is especially effective when used on a fractionally rigged boat that has a non- overlapping headsail. The G-2 is the largest and widest asymmetric - with a luff length equal to the headstay length. Its ideal angles are 80 to 140 AWA, but again it takes a minimum of 18 knots of wind to sail the deepest angles. All cruising spinnakers can be
used with a furling sock which makes hoisting and dousing them very controllable, even in a breeze. Furling socks are especially practical for shorthanded crew. The furling sock, or snuffer sleeve, is best if it has an oval hoop at the bottom to prevent twists and avoid the pulling from one side that can be experienced with round hoops.
Conventional style roller furling
units are not designed for big, full, cruising spinnakers. Most furlers start the furl at the tack. As the furling line is pulled, the sail wraps, tack up, around a head foil, or internal rope. This works well with a relatively flat sail, and a relatively short luff. Fuller asymmetricals have a longer luff designed to project to windward, which creates a problem for furling. The latest furler designs use a
different approach that work well with long luff, cruising spinnakers. The roller furling drum has a swivel, on which the tack of the sail is lashed. The head is lashed to the top of the cable which is attached to the head swivel (so the halyard does not wrap). The unit has a strong external luff cable (independent of the sail). The head swivel and roller furling drum are lashed to that cable. As you pull the furling line, the drum turns the external rope and the lower half of the head swivel. The tack (attached to the tack swivel) does not furl. This causes the head of the sail to start to furling first. And as you continue to pull the line, the sail furls on an angle from the top down in a nice tight furl. These furlers will be ideal for the new breed of asymmetrics that are being designed for yachts which utilize non-overlapping headsails, often on fractional rigs that allow for a masthead spinnaker halyard. Many boats using these asymmetrics have short sprits strong enough to handle the downwind sail and furler loads. An easily handled cruising
Videos
Asymmetrical use guide
spinnaker allows you a larger, fuller sail for quicker speeds on reaching angles. With less slogging on cruising passages, you will “enjoy the journey” even more this summer. Jack Christiansen has been a sailmaker
in Seattle since 1983 and is the owner of North Sails Seattle.
There are many videos to be seen
online regarding cruising spinnakers. Go to
www.48north.com and go to page 41 in the July 2011 online issue. Clicking on the pictures above will take you to two videos showing the installation of a cruising spinnaker and using the snuffer sock.
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48° NORTH, JULY 2011 PAGE 41
Ships FREE Ground UPS!
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