AIRPORT PLANNING MANUAL 4. GROUNDMANEUVERING 4.1. GENERALINFORMATION This section provides the aircraft turning capability and maneuvering characteristics. To facilitate the presentation, the data have been determined from theoretical limits imposed by the geometry of the aircraft. As such, they reflect the turning capability of the aircraft in favorable operating circumstances. These data should be used only as a guideline for the method of determining such parameters and for the maneuvering characteristics of the aircraft. In the ground operating mode, varying airline practices may demand that more conservative turning procedures be adopted, to avoid excessive tire wear and reduce possible maintenance problems. Variations from standard aircraft operating patterns may be necessary to satisfy physical constraints within the maneuvering area, such as adverse grades, limited area, or high risk of jet blast damage. For these reasons, the ground maneuvering requirements should be coordinated with the airline before the layout is planned. This section is presented as follows: • The turning radii for nose landing gear steering angles. • The pilot’s visibility from the cockpit and the limits of ambinocular vision through the windows. Ambinocular vision is defined as the total field of vision seen by both eyes at the same time. • The performance of the aircraft on runway-to-taxiway, taxiway-to-taxiway and runway holding bay dimensions. 4.2. TURNING RADII This subsection presents the following information: • The turning radii for various nose landing gear steering angles. The minimum turning radius is determined, considering the maximum nose landing gear steering angle as 76 degrees left and right. • Data on the minimum width of the pavement for a 180° turn. EFFECTIVITY: ALL Section 4 Page 4-1 Oct 07/08 w-apm1346