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the longi~udinal slope should not exceed 7 per cent In any
event, the slopes should not exceed the slope landing
limitations of the helicopters the air taxiway is intended to
serve.
3.1.33 The separation distance between an air taxiway
and another air taxiway, a helicopter ground taxiway, an object
or a helicopter stand shall not be less than the appropriate
dimension in Table 3- 1.
Air transit route
Note.- An air transit route is intended lo permit the
movement of a helicopter above the su$ace, normally at
heights not above 30 m (100 ft) above ground level and at
ground speeds exceeding 37 km/h (20 kt).
3.1.34 The width of an air transit route shall not be less
than:
a) 7.0 times RD when the air transit route is intended for
use by day only; and
b) 10.0 times TZD when the air transit route is intended for
use at night;
when RD is the diameter of the largest rotor of the helicopters
that the air transit route is intended to serve.
3.1.35 Any variation in the direction of the centre line of
an air transit route shall not exceed 120" and be designed so as
not to necessitate a turn of radius less than 270 m.
Note.- It is intended that air transit routes be selected so
as to permit aurorotative or one-engine-inoperative landings
such that, as a minimum requirement, injury to persons on the
ground or water, or damage to property are minimized.
Aprons
Note.- The specifications for aprons included irz
Chapter 3 of Annex 14, Volume I are equully applicable to
heliports as modified below.
Table 3-1. Helicopter ground taxiway and air taxiway separation distances
(expressed in multiples of greatest over-all width of helicopter with rotor turning)
- .
Facility
Helicopter
ground
taxiway
Air
taxiway
Helicopter
Object stand
Helicopter 2 4 1 2
ground (between (between (edge to (between
taxiway edges) centre lines) object) edges)
4 4 1'12 4
Air (between (between (centre line (centre line
taxiway centre lines) centre lines) to object) to edge)
Annex J4 - Aerodromes Volume II
3.1.36 The slope in any direction on a helicopter stand
shall not exceed 2 per cent.
3.1.37 The minimum clearance between a helicopter
using a helicopter stand and an object or any aircraft on
another stand shall not be less than half the greatest over-all
width of the helicopters that the stand is intended to serve.
Note.- Where simultaneous hover operations are to be
provided for, the separation distances specified in Table 3-1
between two air taxiways are to be applied.
3.1.38 A helicopter stand shall be of sufficient size to
contain a circle of diameter of at least the largest over-all
dimension of the largest helicopter the stand is expected to
serve.
Location of a final approach and take-off area
in relation to a runway or taxiway
3.1.39 Where a FAT0 is located near a runway or
taxiway, and simultaneous VMC operations are planned, the
separation distance between the edge of a runway or taxiway
and the edge of a FAT0 shall not be less than the appropriate
dimension in Table 3-2.
3.1.40 Recommendation, A FATO should not be
located:
a) near taxiway intersections or holding points where jet
engine efJJux is likely to cause high turbulence; or
b) near areas where aeroplane vortex wake generation is
likely to exist.
Table 3-2. FAT0 minimum separation distance
Distance between
FAT0 edge and
If aeroplane mass andor runway edge or
helicopter mass are taxiway edge
up to but not including 60 m
2 720 kg
2 720 kg up to but not
including 5 760 kg
5 760 kg up to but not
including 100 000 kg
100 000 kg and over 250 m
3.2 Elevated heliports
Final approach and take-off area and
touchdown and lift-off area
Note.- On elevated heliports it is presumed that the FATO
and the touchdown and lift-off area will be coincidental.
3.2.1 An elevated heliport shall be provided with at least
one FATO.
3.2.2 The dimensions of the FAT0 shall be:
a) for a heliport intended to be used by performance
class 1 helicopters, as prescribed in the helicopter flight
manual except that, in the absence of width
specifications, the width shall be not less than 1.5 times
the over-all lengthlwidth, whichever is greater, of the
longest/widest helicopter the heliport is intended to
serve; and
b) for a heliport intended to be used by performance
class 2 helicopters, of sufficient size and shape to
contain an area within which can be drawn a circle of
diameter not less than 1.5 times the over-all length/
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