In the previous episode
we have talked about the thermal lift
We know that the origins of thermals
are linked to contrast of temperature.
Nevertheless, when it comes to mountains,
glider pilots can also use phenomenons associated to wind.
Let's talk about one of them :
ridge soaring
Ridge soaring is really simple to understand
When the wind blows over mountain
it tends to be deflected upwards
Generating a zone of rising air directly above the slope
Glider pilots just have to follow the mountain ridge
back and forth
to climb into the rising flow.
The strength of the lift depends on the wind strength
but also on the slope profile.
As soon as the pilots has identified the local wind direction
he can use surrounding ridges well exposed to the wind to climb
To detect the wind direction the pilot can use wind socks,
cloud shifting
emissions of smoke
or analyse his drift
Ridge lift can be really strong
and allows you to find long distances really quickly
In a few hours,
you can cross the French Alps only using ridge lift
It is sensational because enables you to fly close to the mountains experience a real sensation of speed
and experience a real sensation of speed
The only inconvenience of ridge soaring
is that you can only exploit it in the slopes on the wind side of the mountain.
This is why in practice,
ridge soaring is often combined with the other types of flying
to enlarge the possibilities
thermal soaring when the sun hits the Earth's surface
and another one associated to wind
that we will discover soon:
wave flying
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