Airo X RT Series - Wind Speed According to BEAUFORT SCALE

Use and Maintenance Manual - X_RT Series Page 25
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
Number
Wind
speed
(
km/h
)
Wind
speed
(
m/s
)
Wind
description
Sea conditions Land conditions
0
0
<0.28
Calm
Flat
Smoke rises vertically.
1 1-6 0.28–1.7 Light air Ripples without crests. No whitecaps.
Wind motion visible in
smoke.
2 7-11 1.7-3 Light breeze
Small wavelets. Crests of glassy
appearance, not breaking.
Wind felt on exposed
skin. Leaves rustle.
3 12-19 3-5.3 Gentle breeze Large wavelets. Scattered white caps.
Leaves and small twigs
constantly moving.
4 20-29 5.3-8
Moderate
breeze
Small waves with breaking crests. Fairly
frequent whitecaps.
Dust and loose paper
raise. Small branches
begin to move.
5 30-39 8.3-10.8 Fresh breeze
Moderate longer waves. Many whitecaps.
Small
amounts of spray.
Small trees in leaf begin
to sway. Strong breeze
6 40-50 10.8-13.9 Strong breeze
Large waves with foam crests and some
spray. Some airborne spray is present.
Large branches in
motion. Umbrella use
becomes difficult.
7 51-62 13.9-17.2
Near gale /
Moderate gale
Sea heaps up and foam begins to streak.
Some foam from breaking waves is blown
into streaks along wind direction.
Whole trees in motion.
Effort needed to walk
against the wind.
8 63-75 17.2-20.9 Fresh gale
Moderately high waves with breaking crests
forming spindrift. Streaks of foam.
Breaking crests forming spindrift.
Some twigs broken
from trees. Cars veer
on road. Progress on
foot is seriously
impeded.
9 76-87 20.9-24.2 Strong gale
High waves whose crests sometimes roll
over. Dense foam is blown along wind
direction.
Larger branches break
off trees,
construction/temporary
signs and barricades
blown over, damage to
circus tents and
canopies.
10 88-102 24.2-28.4
Whole gale /
Storm
Very high waves with overhanging crests.
Large patches of foam from wave crests
give the sea a white appearance. Large
amounts of airborne spray reduce visibility.
Trees are broken off or
uprooted. Considerable
damage to structures.
11 103-117 28.4-32.5 Violent storm
Exceptionally high waves. Very large
patches of foam cover much of the sea
surface. Very large amounts of airborne
spray severely reduce visibility.
Many roofing surfaces
are damaged; asphalt
tiles that have curled up
and/or fractured due to
age may break away
completely.
12 >117 >32.5 Hurricane
Huge waves. Air is filled with driving spray,
sea is completely white with foam and
spray.
Some windows may
break; mobile homes
and poorly constructed
sheds and barns are
damaged.