SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Ventus-2c FLIGHT MANUAL
4.5.8 Flight in rain
When flying the sailplane with a wet surface or in rain, the size of the water drops
adhering to the wing causes a deterioration of its flight performance which cannot
be expressed in numerical values due to the difficulties involved with such
measurements. Often the air mass containing the moisture is also descending so
that – compared with a wet aircraft in calm air – the sink rates encountered are
higher.
Flight tests in rain, conducted by the manufacturer, did not reveal any significant
differences in the stalling behaviour or stalling speeds.
It cannot be excluded, however, that excessive alterations of the airfoil section
(as caused by snow, ice or heavy rain) result in higher minimum speeds.
Approach in rain: See page 4.5.4.2.
November 2003 LBA-app.
Revision -- 4.5.8
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