Yacht Economical Sailboat for Blue water Sailing

Mon, 05 Jul 2010 10:04:41 +0000

Whether used for ocean cruising or family vacations, the Yacht is a sturdy, easy to sail pocket cruiser.
The low topsides, narrow beam and 27-foot length of the Yacht, Vega certainly do not fit the image of a typical ocean-going yacht. Nevertheless several Vegas have successfully circumnavigated the globe. Dozens, perhaps hundreds more have crossed at least one ocean, and one Vega, The Berzerk, sailed through 40-foot seas to Antarctica. Designed after Swedish FolkBoats
Designed in Sweden by Per Brohall in 1964, the fiberglass-hulled Albin Vega is modeled after the narrow-beamed Nordic folkboat. Like the folkboat, the Vega was built to be a sturdy, simple, economical, and easy-to-sail family boat.

Design Features
• Solid Fiberglass hull, with cored fiberglass decks and coach roof for lightness.
• Relatively shallow draft at just under four feet.
• Keel about half the length of the water line for stability, and reduced drag.
• Hull and deck caulked and bolted every 5 inches for a strong, water-tight seal.
• Though topsides are lower than most modern cruisers, the cockpit remains dry and comfortable even in high seas.
Below Deck
Though compact, the Vega has nearly six feet to headroom in the main cabin. There is a small galley with an icebox, sink, and cooktop. A removable table fits between the main cabin settees for dining or charting, and the two settees also serve as 6 foot bunks. The V-berth sleeps two comfortably. With only eight feet of beam, the boat would feel cramped with four adults aboard for any extended period of time, but is well-suited to a small family,

The Sailing Rig
This Yacht is sloop rigged, and can be easily single-handed. The sail area is somewhat conservative for inland waters, but excellent for off-shore. Though the boat doesn’t point exceptionally high, it handles beautifully off the wind, is well balanced, and heels at a comfortable angle even in heavy winds.

Despite it’s popularity, the Vega does have a few issues:
• Random Reversing: The prop is located aft of the rudder, making backing up a bit of a challenge. Many owners have found creative ways to compensate for this quirky flaw.
• Deck Compression below the mast: The Vega’s mast is stepped on the cabin roof, and supported by a beam below deck. Some Vegas have experience sagging of the support beam. Several owners have beefed up the bulkhead and support beam over the years, eliminating the problem, but potential buyers should check the support carefully.
• Weakness of the Rudder Post:The rudder is attached to the aft end of the keel rather than a skeg–normally this is a very solid way to support a rudder, but some Vegas have had problems with the rudder post. Again, this problem has often been corrected by previous owners. To test the rudder, hold the tiller still, and try to move the rudder. If it flexes, it probably needs to be rebuilt.

Marine Wind Generators

Mon, 05 Jul 2010 09:56:50 +0000

Wind generators produce electricity when the wind spins their blades, and the harder the wind blows, the more power they produce.
Many larger sailboats and powerboats — especially those based in the Caribbean, where the wind blows hard almost continuously — mount marine wind generators to capture that wind energy and use it.
But boats in other areas can benefit from wind power as part of an overall electricity generation plan that might also include solar panels or even a diesel generator.
Marine wind generators on the market today can be grouped into two categories: smaller, six-bladed wind power turbines such as the Rutland 913, and larger, three-bladed units, such as the Air-X Marine.
Smaller Wind Generators Spin in a Light Breeze
Smaller, six-bladed wind generators tend to start up and begin to charge the batteries at lower wind speeds than larger, three-bladed wind turbines.
For example, the Rutland 913, which measures 36 inches across, begins to produce electricity when the wind is blowing at 4 knots (4.5 miles per hour), as does the Rutland 504, a very small unit designed for trickle charging with the weekend boater in mind. Both are produced by Marlec Engineering Co. Ltd.
Low start-up speeds make six-bladed wind generators better suited for areas such as the Chesapeake Bay and Long Island Sound in the summer, where winds tend to be light. These units also make less noise when running than their three-bladed cousins.
However, they also produce far less electricity when the wind blows hard. The 12-volt Rutland 913 produces up to 18 amps per hour when the wind is blowing near 40 knots (45 miles per hour), but at more common wind speeds of 15 knots (about 17.2 miles per hour), it produces only 3 amps per hour, or enough to run a small marine refrigerator (assuming the wind is continuous).
Larger Wind Generators Suited for Windy Areas
Three-bladed marine wind generators can be noisy; one cruising sailor who mounted two of them on his 40-foot sailboat notes that the power they generate is wonderful, but in winds higher than 15 knots, “they sound like two Cessna airplanes warming up on the foredeck.”
But boaters get plenty of power to make up for the noise. The 12-volt Air-X Marine produced by SunForce Products Inc., for example, measures 46 inches across and starts charging at wind speeds of 7 knots (8 miles per hour).
In ideal conditions (25 knots/28 miles per hour, as per the manufacturer), it produces upwards of 30 amps per hour. At a wind speed of 15 knots, it produces about 7 amps per hour (enough to run a large marine refrigerator), making it twice as powerful as the Rutland 913 in those conditions.
Marine Wind Generators Tricky to Mount
To obtain the best performance from a marine wind generator, the unit needs to be placed as high as possible, but out of the way of anything that could interfere with its spinning.
Powerboats and sailboats with only one mast (sloop or cutter rigs) generally mount wind generators on tall poles set on the stern of the vessel, while ketch- or yawl-rigged sailboats with two masts have the option of mounting theirs on the aft mast (usually called a mizzen mast).
Regardless of where a wind generator is mounted on a boat, boat owners need to pay careful attention to manufacturers’ instructions on how to install the unit in order to avoid excess vibration. Some vibration and noise with marine wind generators is inevitable, however, and boat owners learn to live with the noise in order to have the power.
In addition, many units must be assembled prior to installation, and the boat owner or installer must pay careful attention to screws or bolts connecting the blades to the center hubs. These blades have been known to fly off in high winds and have the potential to seriously injure someone nearby if installed incorrectly.
High Winds Dangerous for Some Wind Generators
High winds pose dangers to both the boat’s electrical system and the wind generator itself. If the wind generator produces too much electricity, it can damage the vessel’s batteries or even in rare instances cause a fire.
Some units have internal safeguards to avoid this; for example, they might stop generating electricity at high winds or include an internal charge regulator that will control the amount of electricity sent to the batteries. Others require external charge regulators to be added in the electrical wiring between the wind generator and the batteries.

Marine Equipment Technology » sloop

Yacht Economical Sailboat for Blue water Sailing

Marine Wind Generators