Draft ICAO Circular on NLA.pdf - Airports Council International

Landing gear geometry A380-800
ACN - Flexible
FA
FB
FC
FD
ACN - Rigid
RA
RB
RC
RD
63
66**
69
73**
83
87**
111
116**
55
58**
68
72**
89
94**
110
117**
A-3
Code F Code E
B747-
Advanced* C5 An 124 A340-600
B747-
400ER
B777-
300ER
63
65** 29 51 70 61 62
71
72** 33 60 75 69 69
88
90** 40 77 89 85 86
111
114** 56 107 119 108 117
61
62** 29 35 62 59 64
71
72** 34 48 72 69 82
83
85** 44 73 84 81 105
94
97** 55 100 98 92 127
Discussions on the value of alpha factor is ongoing. Aircraft footprints and ACN curves are available in
Section 7 of the respective “Airplane Characteristics for Airport Planning” document in the manufacturers
Web site (Appendix B).
* B747-Advanced is a proposed aircraft (not yet launched) and, therefore, the specifications
are subject to change.
** Freighter version values provided where appropriate.
*** There are two types of main landing gear steering system – post steering with all wheels
steered (747, C5 and An 124), aft-axle steering (aft two wheels out of 6-wheel gear,
e.g. A380-800 and 777). The effect of main gear steering system on turn center location is
shown in the Section 4.3 of the respective “Airplane Characteristics for Airport Planning”
document in the manufacturer Web site (Appendix B).
Table 4: Minimum pavement width required for U-turn
(in ascending order)
Code Aircraft U-turn width Wheelbase Track (to outside tire edge)
E 747-400 152' (46.3 m) 79.0' (24.1 m) 41.3' (12.6 m)
D MD11 161 (49) 81.2 (24.7) 41.2 (12.6)
F 747-Adv 163' (49.7) 85.6 (26.1) 41.3 (12.6)
<strong>ICAO</strong> Version 4.1 — 15 March 2004