4.9.2. Detailed Type Performance (optional)

The Detailed Performance page provides the ability to define one or more optional detailed performance models for the aircraft type.

More than one performance model associated with an aircraft type is supported. Each should be given a meaningful name and can be selected for use when creating a flight plan. A model is built with series of altitudes and temperatures and the performance values at those altitudes.

Detailed performance models are of particular use in turbine powered aircraft where aircraft performance is a strong function of altitude (and temperature). For piston engined aircraft typically operating below 10,000’, detailed performance tables can also be configured for different power settings, but are not essential.

*Performance values at intermediate altitudes will be linearly interpolated within the chosen performance table by AvPlan EFB.

*When one or more Detailed Performance profiles have been created, the basic performance data are shown in grey to indicate that they are not in use. i.e they are ignored.

Creating a profile

To create a detailed model, select the Performance tab:

1. Press + to create a new performance model.
2. Enter a suitable name (e.g. ‘75% Power’, ‘ISA Max Cruise’ or ‘ISA+10 Long Range Cruise’ etc).
3. Press < Performance to go back. You will notice that the new performance model has been created, but is empty.
   

To build the performance model:

1. Select the Edit icon on the bottom of that window.
2. To add a new row, press Add. Each row is a snapshot of the aircraft’s performance at a given altitude and temperature.
3. Values from the flight manual can then be added for each row. Go back to the Performance view and add rows as required.
4. The more entries, the more accurate fuel/flight planning will be. A single engine piston aircraft may only need a handful of entries to cover its performance spectrum, whereas a turbine powered aircraft will benefit from more entries as the performance values change rapidly with altitude.
5. AvPlan EFB will linearly interpolate values between altitudes listed in a performance profile.
   

*The number of rows you add is up to you, but you need at least two – one at sea-level and one at the top of your normal altitude range. How many you put in between will depend on the performance characteristics of your aircraft. The simplest example might be for a small piston aircraft to add one row for sea-level, and another for 10,000ft. For some aircraft, such as turbojets, performance detail in the flight levels will be much more important, with only a couple of rows required to represent low-level flight.

Deleting a Detailed Performance profile

To delete a performance profile tap Delete Profile. A window will pop up asking which profile is to be deleted.

!When a profile is deleted, any rows associated with that profile will also be deleted.

*If all advanced performance profiles are deleted, the basic performance data will become live again and will show in normal black text rather than grey.