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Performance in Flight Planning






In a computerized flight planning system, in-flight performance data supplied by the manufacturer is stored in the computer data base, either in tables, graphs or formulae.

This data is then used in creating the flight plan for a particular flight, using a particular routing and aircraft weight, under the applicable en route weather conditions.

Basic performance criteria for each aircraft includes cruise, climb and descent data for various flight levels, weights and ambient temperatures, and optimum and maximum altitude limits.

Climb, cruise and descent phases of each flight are evaluated separately by the system. Ambient weather conditions, such as forecast wind and temperature aloft, are applied to calculate fuel requirements and elapsed time.

The Operations Officer or pilot creating the flight plan can specify various performance related factors and make any changes he considers necessary for that flight in the interests of safety, passenger comfort or service.

Answer the questions:

1. What does basic performance criteria include?

2. How are climb, cruise and descent phases of each flight evaluated?

3. Can a pilot make any changes during the flight in the interests of safety, passenger comfort and service?

 


TEXT 14

The Flight Plan

(Part 1)

A computer Flight Planning System constructs the operating flight plan for a particular flight. It:

Creates required routes and tracks.

Analyses en-route weather data received for the relevant PROGS, and combines this with detailed route and navigation data for the routings, to produce accurate information on which flight plan calculations are based.

Uses aircraft performance data for the particular aircraft registration or tail number, together with required TOW or ZFW, flight levels, and other specific details for the flight.

The principle benefit lies in more accurate flight planning. The speed and ease with which plans can be produced means more flexible utilization by flight planners of the parameters in the flight plan, resulting in more accurate burn-off calculations, with consequent fuel saving and many other benefits.

Waypoints on the flight plan are often defined by a name, and referenced by latitude and longitude. Airports and en-route checkpoints are typical waypoints which have allocated names. Other waypoint names are simply a restatement of the latitude and longitude, e.g., Oceanic waypoints.

Information for each waypoint is stored on the computer system for inclusion in flight plans. Waypoint co-ordinates for each waypoint, navigational frequencies, MSAs and other information for the route are stored on a database. Updated information is included in any relevant flight plan.

Answer the questions:

1. What does a computer Flight Planning System do?

2. Does the Flight Planning System only create routes?

3. What does it also analyze?

4. What are the weather data received for?

5. What does it combine the weather data with?

6. What is the principle benefit of this system?

7. Who benefits from this system?

8. How are the waypoints usually defined?

9. What are they referenced by?

10. What are the typical waypoints with allocated names?

11. What are oceanic waypoints characterized by?

12. Where is the information for each waypoint stored?

13. What for is it stored there?

 







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