BaseOps User's Guide, Chapter 18: Editing Static Profiles

A static profile describes the noise created by an aircraft when its engine(s) are run on the ground during maintenance and repair work. Operating an aircraft in this manner is sometimes known as a static runup.

In BaseOps, static profiles are defined by a sequence of one or more static profile segments. Each segment describes the duration and daily frequency that the engine(s) are run at a particular power setting.

To work with static profiles, choose Static Profiles from the object type selector dropdown list. Static profiles can be added, duplicated, and deleted as described in Working with the List Pane.

To edit a static profile, first select it in the object list, then edit its properties in the text pane.

Static tracks have numerous properties. These are listed below, grouped for easy reference.

Profile Name and Notes

• Name - A short (10 characters maximum) name that uniquely and unambiguously identifies the static profile.

• Long Name - A one-line (80 characters maximum) name for the static profile. The long name can be more descriptive than the short name. It is optional: if you do not supply a long name, the short name will be used in its place when necessary.

• Notes - Miscellaneous information about the static profile. There is no restriction on the length of notes. Press the Enter key to insert additional lines.

Static Pad Information

• Pad - The static pad associated with this static profile. The pad determines the location of the aircraft modeled by this static profile.

  Select the pad from the dropdown list. Press the Add Static Pad button to add a new pad. Press the Go To Static Pad button to edit the selected pad. See Editing Point Objects for more information.

• Heading - The heading of the aircraft modeled by this static pad, in degrees east of magnetic north. If an aircraft performs static runups while pointed in two or more directions, separate static profiles must be created for each direction.

Aircraft Information

• Aircraft - The aircraft associated with this static profile.

• Engine - The aircraft engine associated with this static profile. The available engines will depend on the selected aircraft.

• Suppressor - The noise suppressor associated with this static profile. The available noise suppressors will depend on the selected aircraft and engine.

• Power Units - The units used to specify engine power settings for this static profile. The available units will depend on the selected aircraft, engine, and noise suppressor.

Segments

A static profile's segments are specified using a table, where each table row models the running of one or more aircraft engines for a specific power setting and duration. The following table columns are defined.

• Power - The aircraft engine power setting for this segment. Type the numeric power level, then choose the operation power description (for example, "Idle"). For some operation power descriptions (for example, "Max A/B"), the numeric power level is fixed and cannot be changed.

  The operation power description is used to select which Noisefile interpolation curve to use. The available operation power descriptions will depend on the static profile's aircraft, engine, and noise suppressor. Information about the Noisefile record that corresponds to each operation power description is displayed below the segment table.

  

  The Range column specifies the range of power levels for which NMap can extrapolate the measured Noisefile noise data. You can enter power settings outside of this range (and are encouraged to do so to accurately record real-world runup parameters). Power levels are clipped to the extrapolation range when NMap is run.

  The Interpolation and OPC columns specify the Noisefile interpolation method and operational power code, respectively.

• Day Ops -
  Evening Ops -
  Night Ops - The average number of times per calendar day that the static profile is performed during the day, evening, and night. Note that day, evening, and night are precisely defined periods: see Operations. The evening period will be displayed only if the number of daily periods for this BaseOps case is three.

• Duration - The length of time that the engines are operated when this static profile segment is performed.

  You can change the units used to specify times: see Setting the Case's Physical Units.

• Num Engines - The number of engines that are simultaneously operated when this static profile segment is performed.

• Notes - Miscellaneous information about this profile segment.

The triangle icon indicates the selected static profile segment. To select another segment, either click somewhere on that segment's row, or navigate to that segment using the Tab key.

To add a new segment, either press the Add Segment button , or press Ctrl + A. The new segment will be added directly below the selected segment.

To delete the selected segment, either press the Delete Segment button , or press Ctrl + Del.

To move the selected segment up or down in the table, press the Move Up and Move Down buttons and , or press Ctrl + U and Ctrl + D. This capability is provided solely for your own organizational purposes; NMap attributes no meaning to the order in which segments are listed.

When you add a new segment, BaseOps simply duplicates the selected segment. If desired, you can use the quick-add feature, which lets you efficiently add a segment while simultaneously specifying its properties. To add a segment, type a quick-add command into the text box, then press the Add Segment button or the Enter key.

The quick-add commands are somewhat cryptic, but once learned, they allow you to add segments very quickly. Frequent users will find it worthwhile spending a few minutes learning the quick-add commands. To display a list of the quick-add commands that you can use, either press the Quick-Add Hints button , or press Ctrl + H.