Sailor-Free Sailing Page 2

For millennia, sailors have proven they can cross vast oceans on boats big and small. But what if you removed the crew, added two hulls, and fitted a hard wingsail and hydrofoils? Meet the Autonomous Unmanned Surface Vessel (AUSV), developed by Harbor Wing Technologies. It carries no crew, and it gathers the majority of its energy from thin solar films on its wingsail, solar
Author:
Publish date:

In normal sailing conditions, in order to set the wing sail more efficiently, both flaps can be independently adjusted to match the different wind speeds occurring at different heights above the water’s surface.

ausv_diagram

As Hubbard notes, “The wing sail has superior performance in mid-range conditions, but the real challenge is to make sure that the rig is safe in all conditions, and can also perform well in light-air conditions.”

The AUSV relies on two safety systems to keep the platform stable, an Internal Navigation System (similar to those used on airplanes), which measures pitch, roll, and yaw, and a series of load cells. When the computer recognizes that the craft is overburdened, the computer trims the wingsail to spill air and reduce the load. The load cells, the nav software, the computer(s), and the foils work together to avoid capsizing at all costs.

According to Harbor Wing Technologies, the hard sail is 50 percent more powerful than a conventional sail, can sail closehauled, and tack through 50 degrees, but has trouble sailing dead downwind. Interestingly, the wing sail itself always tacks through the wind, even if the vessel beneath it is gybing.

Harbor Wing Technologies has built a half-scale 30-foot version of the AUSV (it does not use hydrofoils), which has passed sea trials, including an exercise off Hawaii where the AUSV sailed through a complex set of waypoints, yielding a cross-track error of less than 16 feet. Harbor Wing Technologies plans to build a full-scale 50-foot hydrofoil vessel within the next year. Thus far, military and scientific organizations such as NOAA have shown the most interest in the craft, but Harbor Wing Technologies hopes the technology will also be used in certain passenger ferries, by sailors who no longer want to fuss over sail trim, or by power boaters who are feeling the pinch at the pump.

For more information, check out www.harborwingtech.com

Related

albintoilet

Gear: Albin Pump Marine Toilet

Head Start Is there room for a new marine toilet? Albin Pump Marine thinks so, having just introduced its line of Swedish-built heads—ranging from compact to full-size models—to the American market. The toilets feature vitreous porcelain bowls and either wooden or thermoplastic ...read more

07n_45R2699

Multihull Sailor: Classic Cats

If you’re looking for a decent sub-40ft cruising cat, you have few choices when it comes to new-boat offerings. It is a well-known fact that the multihull market has taken off in a way very few could have predicted. Despite Hurricane Irma’s recent destruction of a large part of ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell. Got a tip? Send it to sailmail@sailmagazine.com Thanks a bunch  This scene is very calm and seamanlike. No frantic rope throwing or shouting. As he passes the line to the gent on the dock, the crew on the boat says, quietly and clearly, “Would you ...read more

mcarthy-and-mouse

Experience: McCarthy and the Mouse

Sitting at the helm in a light breeze, my arms crusted with a fine rime of salt, my skin so dry I’d lost my fingerprints, I heard a clatter and a curse from below. There were only three of us a thousand miles from shore and only one on watch at a time. Usually, the off watch lay ...read more

2018-giftGuide

2018 Holiday Gift Guide

Brass Yacht Lamp Does someone on your gift list spend the whole winter missing the warm days on the water? Let them bring a little bit of nautical atmosphere home with this new lamp from Weems & Plath. The glass enclosure means the flame cannot be blown out even by ...read more

image001

Opinion: On Not Giving Up Sailing

E.B. White was 64 when he wrote his now-famous essay “The Sea and the Wind That Blows,” which begins as a romantic paean to sailing and then drifts, as if spun around by a pessimistic eddy of thought, into a reflection on selling his boat. Does an aging sailor quit while he’s ...read more

1812-JeanneaueNewsVideo

Jeanneau Sun Odyssey 410

Designed by Marc Lombard, the Sun Odyssey 410 shares much in common with her older siblings including of course, the walk-around deck. Other features that set the 410 apart from other models being introduced this year include the 410’s “negative bow” shape allowing for a longer ...read more