Diamond DA 40 Flight Manual page 181

DA 40 AFM
The figures in the following NOTE are typical values. On wet
ground or wet soft grass covered runways the take-off roll
may become significantly longer than stated below. In any
case the pilot must allow for the condition of the runway to
ensure a safe take-off.
For take-off from dry, short-cut grass covered runways, the
following corrections must be taken into account, compared
to paved runways (typical values, see CAUTION above):
- Grass up to 5 cm (2 in) long: 10 % increase in take-off roll.
- Grass 5 to 10 cm (2 to 4 in) long: 15 % increase in take-off
roll.
- Grass longer than 10 cm (4 in): at least 25 % increase in
take-off roll.
- Grass longer than 25 cm (10 in): take-off should not be
attempted.
On wet grass, a further 10 % increase in take-off roll must
be expected.
An uphill slope of 2 % (2 m per 100 m, or 2 ft per 100 ft)
results in an increase in the take-off distance of approximately
10 %. The effect on the take-off roll can be greater.
Doc. # 6.01.01-E
CAUTION
NOTE
NOTE
NOTE
Rev. 8 01-Dec-2010
Performance
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