Aura Definitions

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This page is a work in progress. Additional terms will continue to be added in the future.

Control Modes

A Control Mode is a set of gyro settings that define how the gyro interprets data from the transmitter and the gyro's sensors. Settings can include things like gain and stick priority.

Flight Modes

A Flight Mode is a combination of Control Modes, Dual Rates and Expos that can be selected by a transmitter switch in flight.

Gain

A variable used to adjust how much correction the gyro system will apply for a given movement. The higher the value, the more correction is applied. A zero gain value is no gyro correction.

Bounceback Gain
A variable used to reduce control bounce upon sharp stick movements or quick, rotational stops. The higher the value, the more the Aura will try to eliminate this bounce. This does affect the Rate P-Gain and may allow you to run slightly higher Rate P-Gain with higher Bounceback Gain values.
Live Scaled Gain
Live Scaled Gain is a calculated value that shows the actual Rate P-Gain that is applied based on the calculations of different variables like current transmitter inputs, Master Gain settings and individual axis Gain Scaling settings. This is particularly useful when using Master Gain on the initial flights of a new aircraft or new Aura install. You can simply use the Master Gain on a knob or slider to find the optimum Rate P-Gain in flight, then land and copy the values shown in this field to the Rate P-Gain field. From there, you can disable master gain to avoid accidentally changing the gain in the future.
Master Gain
A way to proportionally adjust or scale the gain up or down via a transmitter channel.
Rate P-Gain
The most commonly used gain in Aura. Rate P-Gain is the amount of change to a servo (or output) for the aircraft's rotation rate (deg/sec). If the Rate P-Gain is very low, the gyro will have little effect on the servo or output. If the gain is too high, the gyro can cause oscillations at higher airspeeds or in windy conditions. It is recommended to start with low gain values and slowly scale them up using then Master Gain Scaling feature.

Launch Assist

This feature helps with hand launching aircraft. It keeps the wings level and commands a brisk climb for you until you apply an aileron or elevator input, which exits Launch Assist.

Aura Assist Roll/Pitch Gain
This is a setting within the Launch Assist menu of the Aura Config Tool that controls how much correction the Aura applies to return the aircraft to the desired angle. The higher the value, the more it tries to correct to the angle set in the Roll/Pitch Angle Command setting.
Roll/Pitch Angle Command
This is a setting within the Launch Assist menu of the Aura Config Tool that controls the angle that the Aura tries to hold during Launch Assist. By default, roll angle is set to 0, meaning wings level, and pitch is set to +30, meaning 30º nose up.

Level Assist

This feature helps bring the aircraft back to a level position when the pilot is not actively giving input. This may also sometimes be called "6-Axis".

Angle Command
Sometimes displayed as "Angle Cmd", this value controls the maximum allowed bank or pitch angles, as well as the desired 'center' angle with the stick in its center position. The default for roll is set to -65º, 0 and +65º, meaning a maximum bank of 65º left and right, with a center position of 0º bank when the stick is centered.
Feed Forward
This controls the portion of the Pilot's command that is directly applied to the output channel. A higher value means more of the pilot's input is directly applied to the surface, where a lower value means less of the pilot's input is directly applied to the surface. For most applications, the default values set in the Aura Config File Wizard is a great starting point, and most will not need to change this value.
Max Rate
This value defines the rotation rate (degrees per second) the aircraft attempts to meet at 100% stick deflection. A lower value will result in a slower roll rate, while a higher value will result in a faster roll rate.

Output Scale

Also known as travel adjust, ATV, or servo end points in some radio systems, this variable sets the maximum travel of a servo output port from a stick command.

Stick Priority

Stick Priority is how the gain is linearly reduced as the Pilot's command (typically, the transmitter stick) moves away from center. If the command is greater than the Stick Priority setting, the gain is decayed to 0. See the Stick Priority FAQ for more information on Stick Priority.

Stick Priority Type
With Aura firmware V1.13 (or newer), we've simplified how Stick Priority is implemented. In the past, the stick priority has been relative to the dual rate. In other words, if you set your dual rate to 50%, your stick priority also had to be set to 50% to have zero gain at full stick deflection. If you set your dual rate to 50%, but left your stick priority at 100%, your gyro was actually at 50% of your set gain value at full stick deflection. For the new type of stick priority, the Aura automatically takes the dual rate value into account, and applies the stick priority based on the stick position. In example, if you want the gyro off at full stick, use 100% stick priority. If you want the gain off at 10% stick movement, use 10% stick priority.
Heritage
The original stick priority method used for the Aura that is based on dual rate. Stick priority is directly related to the dual rate.
Stick Relative
The new stick priority method as of early 2020. Aura automatically takes the dual rate into account and applies the stick priority based on the stick position. If you have 10% stick priority set, the gyro will be off for that axis at 10% stick movement, regardless of the dual rate value.

Sub-Trim

Allows you to make a minor adjustment to the servo center position. This is typically used to achieve proper linkage geometry.