10. Aircraft


Image 10.1 Settings → Aircraft

Any aircraft profiles you have setup appear here. Use the buttons in the top right corner to add new aircraft profiles, or duplicate or export existing ones. These options are described below.

If you are just starting out with OzRunways you will see one aircraft already in the list named OZ-RWY, a Cessna C172.

10.1. Creating a new Aircraft Profile

Tap the ‘+’ to create a new aircraft profile using one of the following options:

  1. New Blank

Create and setup an aircraft profile from scratch (i.e. all fields will be empty).

  1. New Aircraft From Library

Our aircraft library contains profiles for many common aircraft types. Some of these profiles have been provided to us by OzRunways users, and some we have manually created using the POH for the aircraft type. It’s important when using a profile form the library that you go through and make sure the details in the profile match your POH/AFM. To use this option, tap on New from Library, then tap on the profile you want to add in the resulting list, and finally tap Import in the top right corner You will be returned to the main Aircraft screen and the selected profile will appear in the list.

10.2. Viewing/Editing an existing Aircraft Profile

Tap on an aircraft profile in the list to view and/or edit the details. The following screen results (Image 10.2).


Image 10.2 Aircraft edit view

For more information on a particular field tap the ‘?’ icon next to the field name.

Tapping Undo will revert any changes that have been made since opening the aircraft profile.

When editing fuel and performance values further down the page (Image 10.3) you can tap the blue unit label to change the unit type, this will also perform a conversion to the newly selected unit.


Image 10.3 Aircraft edit view, changing units

10.3. Detailed Performance Editor

Be careful when setting Detailed Performance figures as they override any values you have entered back on the main aircraft setup page. Frequently users have ‘played around’ with Detailed Performance details and then forgotten they did this. With rubbish values in the Detailed Performance table, you get rubbish results. The easiest thing is to just enter the default values in the Performance section and leave Detailed Performance figures until you have mastered the app. Detailed Performance figures yield more accurate results for higher performance aircraft (e.g. Bombardier LR45).

The Detailed Performance Editor presents a table where you can enter performance details for your aircraft at specific altitudes. The performance at any altitude is then calculated by interpolation from the values you entered int he table. In the time and fuel calculations for any plan, during climb the values are calculated every 100 feet.


Image 10.4 Detailed performance table

Tap the top right ‘Edit’ button, then tap the green plus ‘+’ at the left of the screen in the row that has just been created. If values have already been set back in the standard ‘Performance’ section then they will appear after pressing the ‘+’. Tap on a value to change it. Start at 0 ft. Make adjustments and then press the green plus again to add another row. The altitude will automatically increment by 5000 feet, which can be edited, and the previous values repeated. Edit the fields as necessary. When creating a new row the altitude will always increment by 5000’ e.g. if you enter 1000’ the next row created will be at 6000’. Tap to edit if necessary.

When you have finished entering all values, tap ‘Done’ in the top right corner

You now have a table of performance values for your aircraft. The performance at any intermediate altitude is interpolated.

To remove a row tap ‘Edit’, then the red minus ‘-‘ sign on any rows which you wish to delete. When finished tap ‘Done’ in the top right corner.


Values in the Detailed Performance Table override any details entered in the standard Performance section. Incorrect details here will result in incorrect performance calculations (rubbish in = rubbish out). If you are not comfortable with using Detailed Performance, delete any values in the table and use the standard Performance section instead.

10.4. Weight and Balance Setup

First a word of explanation. This is where you create and setup the Weight and Balance (W&B) configuration for your aircraft. This includes details such as Basic Empty Weight, Moment & Arm, and defining the envelope and stations. Station weights are entered and changed during the Planning phase. You can create multiple W&B configurations for a given aircraft. For example, if your aircraft has removable doors you might have one configuration for doors on, and another for doors off. The configuration can be selected when planning.


Set the units correctly on the main aircraft page before you start editing W&B configurations.

When you tap on ‘Config:’, existing W&B configurations are listed first, followed by a button to ‘Add new Config’. Tap the ‘i’ to edit an existing configuration. Tap ‘Add new Config’ to create a new one, then tap the ‘i’ next to the new configuration that has appeared in the list (Image 10.5)


Image 10.5 W&B setup - configuration selection

At the top of the screen is the W&B diagram (Image 10.6). Note that this plots Weight on the vertical axis and Arm on the horizontal axis. Beware: Some aircraft POH’s specify Moment on the horizontal axis. You must divide the Moment by the Weight for that data point to get the Arm. The Moment-Arm or the Moment may be specified for the Base Data section. The App will calculate the missing value.


Image 10.6 W&B setup - editing a configuration

Scroll down to show the station entries and the longitudinal envelope. Weights entered for stations are default values. For example if you are always the pilot you can enter your own weight next to the applicable station and the Weight & Balance planner will always default that station to that weight.


Image 10.7 W&B setup - editing a configuration

Any station entry with the word ‘Fuel’ in it is assumed to be a fuel tank. For more complex fuel scenarios, such as multiple fuel tanks with different arms, you will need to use Fuel Tables. The Lateral Envelope will appear if any lateral arm is non-zero in the station list. Tapping the Edit button in the top right corner will allow you to add or delete stations and envelope points using the green plus ‘+’ or red minus ‘-’ symbols.

10.5. Fuel Tables

Fuel tables provide a means of specifying the weight and corresponding movement of the fuel arm for complex aircraft. In essence you specify the arm for the particular weight. As fuel burns off, the arm can move in mysterious ways (i.e. not just linearly), if that is what your aircraft requires. The first step in using fuel tables is to turn the feature on. This is achieved by turning on ‘Use Fuel Tables’ in the section of the aircraft profile.

When ‘Use Fuel Tables’ is switched on the Fuel Capacity for the aircraft back in the Fuel section will display [Table] next to the capacity. The capacity can no longer be changed there as it must be defined in the Fuel Table.

Image 10.8 shows a simple fuel table. It indicates for 0gal (empty) up to 107gal the arm is 126.8in, then from there until 182gal (max capacity) the arm is 135.5in. To add entries to the Fuel Table tap ‘Edit’ in the top right corner and use the green plus ‘+’ or red minus ‘-’ to add or delete entries. When finished tap ‘Done’.


Image 10.8 Fuel table defined in W&B editor

10.6. Importing & Exporting

To export/share an aircraft, tap the profile in the list then tap the action button in the top right corner (sqaure/arrow icon). The share sheet will appear and you can choose to export via a variety of options including AirDrop, Email, Dropbox, and others.

Aircraft Profiles can be imported in various ways. If somebody is sharing an Aircraft Profile with you via AirDrop then a prompt will appear with an option to ‘Open with Oz RWY’. If an Aircraft Profile file has been shared with you via some other method (email, dropbox etc.) tap and hold the file icon until the share sheet appears, then choose ‘Copy to Oz RWY’.

10.7. Duplicate

To copy/duplicate an aircraft profile, tap on the action button in the top right corner, then choose Duplicate. The new aircraft profile will appear in the list with ‘-1’ appended to the registration.