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and reference humidity is defined as follows:
- at temperatures at and below ISA, 80 per cent relative
humidity,
-at temperatures at and above ISA + 28"C, 34 per cent
relative humidity,
-at temperatures between ISA and ISA + 28"C, the
relative humidity varies linearly between the humidity
specified for those temperatures.
Take-off surface. That part of the surface of an aerodrome
which the aerodrome authority has declared available for
the normal ground or water run of aircraft taking off in a
particular direction.
The mass of the aeroplane at take-off is not to exceed the
maximum take-off mass specified in the flight manual for the
altitude and temperature at which the take-off is to be made.
2.2 Performance
The performance of the aeroplane, as determined from the
information contained in the flight manual, is such that:
a) the accelerate-stop distance required does not exceed the
accelerate-stop distance available;
b) the take-off run required does not exceed the take-off
run available;
c) the take-off distance required does not exceed the takeoff
distance available;
d) the net take-off flight path starting at a point 10.7 m
(35 ft) above the ground at the end of the take-off
distance required provides a vertical clearance of not
less than 6 m (20 ft) plus 0.005D above all obstacles
lying within 60 m plus half the wing span of the aeroplane
plus 0.125D on either side of the intended track
until the relevant altitude laid down in the operations
manual for an en-route flight has been attained; except
that obstacles lying beyond 1 500 m on either side of the
flight path need not be cleared.
The distance D is the horizontal distance that the aeroplane
has travelled from the end of the take-off distance available.
Note.- This need not be carried beyond the point at which
the aeroplane would be able, withoutficrther gaining in height,
to commence a landing procedure at the aerodrome of take-off
or, alternatively, has attained the minimum safe altitude for
commencing flight to another aerodrome.
However, the lateral obstacle clearance is liable to be
reduced (below the values stated above) when, and to the
extent that, this is warranted by special provisions or conditions
which assist the pilot to avoid inadvertent lateral
deviations from the intended flight path. For example,
particularly in poor weather conditions, a precise radio aid
may assist the pilot to maintain the intended flight path. Also,
when the take-off is made in sufficiently good visibility
1/11/01 ATT C-10
Attachment C Annex 6 - Operation of Aircraft
conditions, it may, in some cases, be possible to avoid
obstacles which are clearly visible but may be within the
lateral limits noted in 2.2 d).
Note.- The procedures used in determining the acceleratestop
distance required, the take-off run required, the take-off
distance required and the net take-offflight path are described
in the Appendix to this example.
2.3 Conditions
For the purpose of 2.1 and 2.2, the performance is that
corresponding to:
a) the mass of the aeroplane at the start of take-off;
b) an altitude equal to the elevation of the aerodrome;
C) either the ambient temperature at the time of take-off, or
a declared temperature giving an equivalent average
level of performance;
and for the purpose of 2.2:
d) the surface slope in the direction of take-off (landplanes);
e) not more than 50 per cent of the reported wind
component opposite to the direction of take-off, and not
less than 150 per cent of the reported wind component
in the direction of take-off. In certain cases of operation
of seaplanes, it has been found necessary to take account
of the reported wind component normal to the direction
of take-off.
2.4 Power failure point
In applying 2.2 the power failure point chosen for establishing
compliance with 2.2 a) is not nearer to the starting point than
that used for establishing compliance with 2.2 b) and 2.2 c).
2.5 Turns
The net take-off flight path may include turns, provided that:
a) the radius of steady turn assumed is not less than that
scheduled for this purpose in the flight manual;
b) if the planned change of direction of the take-off flight
path exceeds 15 degrees, the clearance of the net takeoff
flight path above obstacles is at least 30 m (100 ft)
during and after the turn, and the appropriate allowance,
as prescribed in the flight manual, is made for the
reduction in assumed gradient of climb during the turn;
c) the distance D is measured along the intended track.
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ICAO 附件6 Operation of Aircraft(62)
