SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Ventus-2c FLIGHT MANUAL
NOTE
The polyester coating on this sailplane is known from many years
experience to become very brittle at low temperature.
Particularly when flying in wave at altitudes in excess of about 6000 m
(approx. 20000 ft), where temperatures of below -30° C (-22° F) may
occur, the gel-coat, depending on its thickness and the stressing of the
aircraft components, is prone to cracking!
Initially, cracks will only appear in the polyester coating, however, with
time and changing environment, cracks can reach the Epoxy/Carbon
cloth matrix.
Cracking is obviously enhanced by steep descents from high altitudes
at associated very low temperatures.
WARNING
Therefore, for the preservation of a proper surface finish free from
cracking, the manufacturer strongly advises against high altitude
flights with associated temperatures of clearly below -20° C (-4° F)!
A steep descent with the airbrakes extended should only be conducted
in case of emergency (instead of the airbrakes, the undercarriage may
also be extended to increase the rate of sink).
November 2003 LBA-app.
Revision -- 4.5.7.2
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