Schwäbische Alb (Aalen-Elchingen)/W (West)

erstellt von Jörg Dummann — zuletzt verändert: 18.08.2013 16:22

Schwäbische Alb (Aalen-Elchingen) / 3100m MSL; Pilot: Lennart Batenburg

Name

Lennart Batenburg

12.08.2013

Windrichtung

W (West)

Ort des Wellensteiggebietes

Schwäbische Alb (Aalen-Elchingen)

Auslöser

Combination of ground features and shear

Erreichte Höhe

3100m MSL

Zeit-Bezugssystem

UTC

Höhen-Bezugssystem

QNH

Weitere Daten

Verein: Amsterdamsche Club voor Zweefvliegen (ACvZ), Netherlands
Flugzeugtyp: Ls-3a (15m)
-------------------
Startort: EDPA (QNH 1020hPa, 582m MSL)
Startzeit: 11:08 UTC
Landeort: EDPA
Landezeit: 17:58 UTC
-------------------
Bodenwindrichtung: 290
Bodenwindstärke: 20 km/h
-------------------
Einstieg in die Welle/n: Heidenheim An Der Brenz, 12:16 UTC
Einstieg(e) aus: Thermal
Einstieg(e) in Höhe: 1800m MSL
Angetroffene Steigwerte: 1.0-1.8 m/s
Erreichte Höhe(n): 3067m MSL
Ausdehnung des Steiggebietes: slowly dying and moving along with the wind
-------------------
Vermuteter Auslöser: combination of shear and 'Venturi' from the ground
Höhenwindrichtung(en): below cloudbase 290 degrees
                       above  ,,       260 degrees
Höhenwindstärke(n): below cloudbase 17 km/h
                    above cloudbase 25 km/h
Temperaturangaben: unknown

Freier Bericht

While crossing from one cloudstreet to another cloudstreed, parallel to the wind, I discovered a good lift without cumulus above it (somewhat down the wind there was a lenticularis cloud though). When climbing just above cloudbase I started to make turns like a lying 8 in front of the cumulus I've just left, wave strength here was about 1.8-2.0 m/s. Once above the cloudtops of the cumulus I tried to stay in the wave by maintaining my position relative to the lenticularis cloud, which was moving along the wind to the east. Once reached 3100m MSL (FL100) I decided to descend again due to airspace and the absence of cockpit oxygen. During the day we tried to enter other wave systems but without succes (there were a lot of lenticularis clouds, both on the tops of the cumulus and far above them).