ver since the days
of Cleopatra’ Ss

demanded a great deal of
human muscle: the sails
had to be continually ad-
justed for what was con-
sidered optimum efficiency.
But the 1990s brings a better
# way to ride the waves . . . the
| Welker Wingsail does not re-
# quire all that brute force. With
4a women’s more gentle touch,
mcoupled with advanced com-
siputerization, a member of the
mifairer sex may become the
world’s leading racing sailor.
‘he Wingsail appears to have:
been designed by an
Jaeronautical engineer rather
aithan by a traditional mariner.
Catamarans have been
around for decades. Even the
smodern offshore cruising
= yacht, for all its push-button
greefing, autopilot and asym-
4@ metric cruising chute, is still a
| begt of the past. Now two
# production yachts break the
d traditional mold: Planesail, a
448 foot cruising trimaran,
Ferovides luxury sailing for six,
| while the 30 foot Zefyr is a
high-performance day boat.
The difference between these
yachts and what has gone
before is a pale blue wing —
| power via a vertical wing!
Three principal components
make up the wingsail: a verti-
cal wing in the front of the

boat, an aircraft-style flap be-
hind the wing that can be
angled to adjust the camber.

(thus increasing power), and

the tail, located downwind of
the wing/flap. All components
operate on an arm that rotates
around a point below the wing.

Any sailor will recognize the
advantages. There is no need
for rigging to hold up the sail
and the need for sheets is
eliminated by using the tail to
rotate. The only rope aboard is
for the anchor. The sail can be
left up year round by simple
feathering as on an airplane

DEIOMmerrow

By FRANK OGDEN

propeller. And no matter what
the rotation angle, the
wingsail never protrudes
beyond the extremities of the
hull, so the boat can be safely

| Sailing into the future

left next to other yachts in a
marina without risk of con-
tact. Everything is under
fingertip control.

The built-in computer sys-
tem, Micromariner, automat-
ically optimises the settings
for any course and for wind
speed by comparing its
database of windtunnel infor-
mation with the data being fed
in by the boat’s wind instru-
ments. The computer maxi-
mizes the settings until a wind
strength is reached that could

capsize the boat, then it auto-
matically reduces the setting
to within safety range. No
crew is required. Winds up to
109 knots have been ex-
perienced and the units have
been tested through seven
hurricanes. Four separate
electrical generation systems
are aboard and even without
any on-board power, fail-safe
actuators can be worked by
hand.

For the first time, there is a
yacht with sybaritic comfort
that can compete with a villa
in Malibu or Majorca.

More information: Walker
Wingsail Systems PLC,
Devonport Royal Dockyard,
Plymouth, Devon, PL1 4SG.
United Kingdom. Phone:
Plymouth (0) 752/605426.
Fax: Plymouth (0)
752/605428.

This Week August 29,1990. Page M5’ —

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