In rec.aviation.soaring habe ich das folgende gelesen, und ich glaube es ist auch wichtig für uns
Advice: Go fly in the mountains. You will fly high in thin air. You
will need more space to turn. Read all the books. Pay attention to the
way air flows. Don’t hit the rocks. Fred Robinson
I vote with Fred.
I’ve spend my entire life flying in mountains and while it’s not difficult,
there are subtile ways a mountain can bite you. When you get near big
mountains, visual effects plays tricks on your mind. Here’s one that
doesn’t require high winds.
As you approach a ridgline or peak at high altitudes, you have to keep part
of your scan on the airspeed indicator. At high altitudes on warm summer
days, true airspeed is significantly higher than indicated airspeed.
If you don’t monitor your airspeed, your brain will start interpreting
ground speed as airspeed. As the fast moving terrain begins to fill your
visual field, you’ll feel an overpowering sensation of speed. You’re
scooting over the ground at an unbelievable speed and yet the ASI shows you
just above stall.
If you pull up to get away from the terrain, you stall and become yet
another statistic. If you do hit the ground in the high, thin air, you hit
fast and hard – it’s rarely survivable.
Always leave yourself a downhill escape route. Don’t glide into rising
terrain such that there’s no way to lower the nose and dive out of the
situation. You don’t want to be in a situation where you have to turn
while recovering from a low airspeed.
