MACGREGOR 70 "ANTHEM"

RIG AND SAILS

 

The all carbon fiber main mast is by GMT, and is 70' from the cabin top to the mast head.  It has a high gloss linear polyurethane finish.

The all carbon fiber mizzen mast (50') is also by GMT.  Standing rigging is stainless Nitronic by Navtec

The conversion to a ketch rig provided an amazing increase in performance.   The gigantic sailplan, supplemented  with a mizzen staysail and a really big assymetrical chute (mounted on a 12' long easily removable bowsprit), provide incredible speed in light air.  We put a lot of sail on this boat.  A large percentage of sailing time is spent in light to moderate air, and we wanted the boat to be virtually unbeatable in these condtions.   When it blows, you can always shorten sail, or douse the mainsail completely and sail with just the jib and mizzen,  a combination the provides perfect helm balance with a small and easily handled sailplan.

The all carbon masts cut the weight of the rig by nearly 600 pounds. This give a major improvement in the boat's stability

 

The main and mizzen booms are unique and attractive.  These are called "basket booms".  When the main or mizzen sails are dropped, they disappear completely into the boom.  A small  dacron cover is permanently attached to a boltrope extrusion on the starboard top of the boom.  The covers stretch across the lowered sail and completely protects the sail from weather.  To hoist the sail, 4 snaps on the port side of the boom are released, exposing the sail.  The sail is then hoisted.  When the sail is completely up, or reefed, the cover, still attached to the starboard side of the boom, is pushed down into the boom, where it stays while sailing.

When lowering the sail, it is dropped into the boom, guided by lazy jacks.  The small cover is pulled across the sail and snapped in place.   This is the best looking and easiest to use of any sail handling system we have ever seen.   It also works well to  control the sail when partially reefed.

The fiberglass boom is lighter than a standard aluminum boom, and is finished with high gloss Imron polyurethane paint to match the color of the mast.

This system makes single handed sailing and sail handling a snap.  I frequently sail the  boat by myself, and this is the biggest labor saving device that we have come up withand t

The boom is wide, but relatively short from top to  bottom, so it looks great from the side of the boat.  It also has a big advantage over a conventional boom in that it provides significant tip plating, preventing air (and thus lift) from spilling out around the bottom of the sail.   This system is used to great advantage aboard the J boat Endeavor.  The front end of the boom is open, allowing air to flow through the boom to prevent drag.

 

 

This is the self tending system for the jib.  The jib is sheeted to a self-tacking roller bearing car on a curved track just ahead of the mast.  When the boat is tacked, the sail moves automatically to the opposite side of the boat without releasing and re-tightening the jib sheet.  This minimizes the noisy flap­ping of the jib as the boat is tacked and saves an enormous amount of work.  The skipper simply turns the wheel.  Anyone who has ever tacked a large boat up a narrow channel, or in close quarters racing, knows that the effort to bring a large jib from one side to the other with each tack can be a killer for the crew.  The self tacking system, in our opinion, is indispensable for comfortable sailing.

 

SAIL INVENTORY

Mainsail:    10 oz per sq ft dacron fabric, by Doyle.  Full battens with roller bearing Harken cars that slide up and down a track on the aft side of the mast.  3 reef points.

Mizzen:  8 oz dacron, by Doyle.  This sail is also fully battened with cars that slide up and down on the mast.  2 reef points

Working, self tending jib.  8 oz dacron by Doyle.  Mounted on a heavy duty Harken roller furling system with an anodized aluminum 2 track luff extrusion.

130% genoa, laminated mylar and spectra by Ullman.  Very light and very strong.  Perfect for going upwind in light air

Asymmetrical spinnaker, nylon, by Ullman, mounted on a 12' removable bowsprit.  This sail is used more than the conventional spinnaker.  With this rig, the boat generates a lot of apparent wind, like a fast catamaran, and the boat is rarely sailing directly downwind.

Code zero genoa/drifter. This is a very lightweight genoa type sail that goes to the end of the bow sprit. It adds a huge amount of sail area for going upwind in very light air. It is used as a reaching sail in anything but really heavy winds. and as a substitute for the assymetrical spinnaker in extremely light air. (Spinnakers are difficult to fly in very light air, since the weight of the sail keeps them from flying effectively.

 

 

The 12' long removable bow sprite allow a lot of sail to be added for downwind sailing and light air upwind sailing. In very light air, you want a lot of sail.

 

There are dedicated  Harken 2 speed winches for all sheets, guys and halyards.  All sheets can be lead to a powerful  electric Harken winch on the cockpit coaming near the skipper.  This is a nice feature that takes all of the hard work out of trimming and hoisting sails.

 

Hydraulic Navtec boom vangs are used for both main and mizzen booms. 

Hydraulic Navtec cylinders are also used for tensioning the backstays.