TIGIEFFE AIRO A Series, Use And Maintenance Manual

Page: 34 / 130

Use and Maintenance Manual – A16 J A18 J Series Page 34
3.3.4. Wind speed according to Beaufort scale
You can use the table below for a simple assessment of the wind speed. We remember that the max. limit for each machine
model is indicated in the table TECHNICAL FEATURES OF STANDARD MACHINES.
The machines for which the max. wind limit is 0 m/s must be used indoors only. These machines cannot be
used outdoors even with no wind.
Beaufort
scale
Wind
speed
(km/h)
Wind
speed
(m/s)
Wind Rating Sea/ocean conditions Land conditions
0 0 <0.28 Flat Calm. Smoke rises vertically.
1 1-6 0.28
–
1.7 Light air
Ripples without crests. No white crest
generation.
Wind direction detected
by smoke direction
2 7-11 1.7-3 Light breeze
Tiny, short but visible wavelets. No breaking
water waves, crests foam with glassy
appearance.
Wind perception on
bare skin. The leaves
rustle.
3 12-19 3-5.3 Gentle breeze
Water waves start to break: the crest foam
looks glassy. "Whitecaps" of bubbles and
streaks on breaking crests.
Leaves and small twigs
constantly moving.
4 20-29 5.3-8
Moderate
breeze
Small waves becoming longer. Numerous
whitecaps.
Dust, leaves, and loose
paper lifted. Small tree
branches move.
5 30-39 8.3-10.8 Fresh breeze
Moderate waves taking longer form. many
whitecaps, some spray.
Small trees in leaf begin
to sway, small waves
start to form on inland
waters.
6 40-50 10.8-13.9 Strong breeze
Long waves begin to form. White foam
crests are very frequent. Some sprays.
Whole trees in motion.
Difficulties in keeping
an umbrella.
7 51-62 13.9-17.2 High wind
Sea heaps up with moderately high waves
of greater length. The edges of crests begin
to break into spindrift, foam blown in streaks
in the same wind direction.
Larger tree branches
moving, whistling in
wires Strong resistance
felt walking against
wind.
8 63-75 17.2-20.9 Gale
High waves, Sea begins to roll, dense
streaks of foam, spray may reduce visibility
Twigs breaking off
trees, generally
impedes progress
Walking against the
wind is impossible.
9 76-87 20.9-24.2 Whole gale
Very high, heavy rolling waves. Foam blown
into thicker streaks.
Slight structural
damage occurs (slate
blows off roofs).
10 88-102 24.2-28.4 Storm
Very high waves with overhanging crests,
Sea white with densely blown foam, the
water has a white appearance. Heavy
rolling, and reduced visibility.
Trees broken or
uprooted. Considerable
structural damage.
11 103-117 28.4-32.5 Strong storm
Exceptionally high waves hiding average
size vessels from the sight. Foam patches
cover sea, Air filled with foam, completely
white with driving spray, visibility greatly
reduced.
Heavy structural
damage.
12 >117 >32.5 Hurricane
Exceptionally high waves, sea completely
white with driving spray.
Heavy structural
damage.