-STAR: . STAR Identifier . Compatible runways . STAR Path/Terminations . Required Navigation Performance (RNP) type
-STAR En route transitions . STAR En Route Transition Ident . En route Transition Path/Terminations . Required Navigation Performance (RNP) type
APPROACH
An APPROACH can contain three segments: APPROACH Transition,
APPROACH and Missed APPROACH. The following data can be
provided for each of the segments:
-
APPROACH . APPROACH Identifier . Runways Number . APPROACH Path/Terminations . Required Navigation Performance (RNP) type
-
APPROACH TRANSITION: . APPROACH transition identifier . APPROACH Transition Path/Terminations . Required Navigation Performance (RNP) type
-MISSED APPROACH: . Missed approach Path/Terminations
. Required Navigation Performance (RNP) type The data base can contain the following types of approach procedures: ILS, MLS, ILS localizer only, ILS/Back Course, IGS, LDA, SDF, GPS, VOR, NDB and RNAV. With the approach procedure, the NAVAID procedure will be provided. If the OPC "Back Beam option activated" is set to N, none of the Back Beam approach shall be supplied to the FM requests. Back Beam approaches will remain in the Data Base but in this case, they will be non selectable. If the specified APPROACH is an ILS/MLS APPROACH, the Glideslope Crossing Altitude is provided for the FINAL APPROACH FIX and the Glideslope angle is also provided. For an MLS approach, this glideslope angle is the minimum elevation angle as opposed to the nominal elevation angle. Every leg in the terminal area procedure is defined with a path/terminations. The following constraints can exist for the appropriate path/terminations:
-Altitude Constraint
-Speed Constraint
-Flight Path Angle Constraint
(k) MORA Each MORA is defined for a square whose dimensions are one degree of latitude by one degree of longitude. The data required is as follows: MORA
(6) Performance data base
The performance data base is the data stored for the performance R computations. This data base is composed of tables and equations for R computing the aircraft aerodynamic and engine models. Access to the
performance data base is achieved by the performance process which
uses the data for predictions and optimizations.
Three types of model for each aircraft version are described in the
performance data base relating to:
-Aircraft aerodynamic (Aero)
-Engine
-Performance
Full provision is provided to cope with different aircraft versions
(engine and aerodynamic models) within the same performance data
base.
(a)
Aircraft aerodynamic (Aero) model The aircraft aerodynamic model consists of sets of lift and drag coefficients and buffet coefficients of lift used to calculate the aircraft lift, drag, and roll buffet limit for the entire range of aircraft configuration : one for clean configuration, the other for a configuration other than zero.
(b)
Engine model The engine model describes the interrelations between thrust, thrust settings, and fuel flow for a particular engine under given operating conditions. This model is used by the performance function in conjunction with the aircraft models to solve the aircraft steady state equations of motion.
(c)
Performance model (based on Aero and engine models) The performance model includes :
-flight envelope limits,
- operating speeds,
-economic/endurance speeds,
-TO/GA and alternate allowances,
-performance tables,
-and various other parameters.
NAVIGATION/LATERAL FUNCTIONS - DESCRIPTION AND OPERATION
________________________________________________________
1. General
_______
The lateral functions of the flight management system consist of:
-Navigation computations which determine the A/C position and various derived data. The modes of computation are described in Para. 2.A. and the navigation mode selection is described in Para. 2.B.
-Radio navigation tuning for VOR, DME, ILS, ADF in term of identifier, or frequency and course or BFO is explained in Para. 2.C.
-IR (inertial reference) alignment (Ref. Para. 2.D.)
-Lateral guidance along the flight plan which is subdivided in: . flight plan leg transition (Ref. Para. 2.E.), . lateral flight plan parameters (Ref. Para. 2.F.), . nav guidance mode description and engagement logics (Ref. Para. 2.G.) and flight plan sequence logic (Ref. Para. 2.H.).
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