# Helicopter Specific Events<no value>
The event IDs listed here are those that are specifically tied to **helicopter** systems.


### General

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| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="AUTO_HOVER_OFF" />}}`AUTO_HOVER_OFF` | `KEY_AUTO_HOVER_OFF` | N/A | Disable the auto-hover function of the helicopter, if one is available.<span></span>***Not currently implemented in the Simulation*** |
| {{< anchor id="AUTO_HOVER_ON" />}}`AUTO_HOVER_ON` | `KEY_AUTO_HOVER_ON` | N/A | Enable the auto-hover function of the helicopter - if one is available.<span></span>***Not currently implemented in the Simulation*** |
| {{< anchor id="AUTO_HOVER_SET" />}}`AUTO_HOVER_SET` | `KEY_AUTO_HOVER_SET` | [0]: True/False (1, 0) | Set the auto-hover - if available - to either on (True, 1) or off (False, 0).<span></span>***Not currently implemented in the Simulation*** |
| {{< anchor id="AUTO_HOVER_TOGGLE" />}}`AUTO_HOVER_TOGGLE` | `KEY_AUTO_HOVER_TOGGLE` | N/A | Toggle the auto-hover - if available - between on (True, 1) and off (False, 0).<span></span>***Not currently implemented in the Simulation*** |
| {{< anchor id="AXIS_COLLECTIVE_SET" />}}`AXIS_COLLECTIVE_SET` | `KEY_AXIS_COLLECTIVE_SET` | [0]: Set the collective (0 to 16384) | Set the collective pitch angle (a value from 0 to 1 interpolated from the 0 to 16384 input). |
| {{< anchor id="AXIS_STEERING_SET" />}}`AXIS_STEERING_SET` | `KEY_AXIS_STEERING_SET` | [0]: Set the steering amount (-16384 to 16384) | Set the steering axis value from -1 to 1 (interpolated from the -16384 to 16384 input). |
| {{< anchor id="AXIS_TAIL_ROTOR_SET" />}}`AXIS_TAIL_ROTOR_SET` | `KEY_AXIS_TAIL_ROTOR_SET` | [0]: Set tail rotor speed (0 to 16384) | Sets the tail rotor speed as a value from 0 to 1 (interpolated from the 0 to 16384 input). |
| {{< anchor id="COLLECTIVE_DECR" />}}`COLLECTIVE_DECR` | `KEY_COLLECTIVE_DECR` | N/A | Decrease the engine collective by the amount specified for the [collective_increment](../../../content-configuration/cfg-files/flight_model.cfg/#collective_increment) parameter. If the parameter is not set then a default value of 0.05 will be used. Minimum value on decrement is clamped to 0. |
| {{< anchor id="COLLECTIVE_INCR" />}}`COLLECTIVE_INCR` | `KEY_COLLECTIVE_INCR` | N/A | Increase the engine collective by the amount specified for the [collective_increment](../../../content-configuration/cfg-files/flight_model.cfg/#collective_increment) parameter. If the parameter is not set then a default value of 0.05 will be used. Maximum on increment value is clamped to 1. |
| {{< anchor id="COLLECTIVE_RELATIVE_AXIS" />}}`COLLECTIVE_RELATIVE_AXIS` | `KEY_COLLECTIVE_RELATIVE_AXIS` | N/A | Increment or decrement the collective based on the speed and the distance of the interaction from the user device (values are clamped between 0 to 16384).<span></span>**NOTE**: This is primarily for the PS5 controller touch-pad, but should work with any touch-input. |
| {{< anchor id="DECREASE_HELO_GOV_BEEP" />}}`DECREASE_HELO_GOV_BEEP` | `KEY_HELI_BEEP_DECREASE` | [0]: value<span></span>[1]: engine | If the helicopter has an engine trimmer, this event can be used to decrease the nominal engine/rotor RPM that the governor is trying to maintain for the indexed engine.<span></span>The amount that the trim will be adjusted by is set using the [`engine_trim_rate`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_rate) CFG parameter, and the min and max achievable values are set using [`engine_trim_min`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_min) and [`engine_trim_max`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_max). Alternatively, you may supply a value that will override that set in the [`engine_trim_rate`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_rate) CFG parameter (the min and max values will still be used).<span></span>An engine index of 0 targets *all* engines, and any other value targets that specific engine. |
| {{< anchor id="HELICOPTER_FORCE_TRIM_RELEASE_BUTTON_SET" />}}`HELICOPTER_FORCE_TRIM_RELEASE_BUTTON_SET` | `KEY_HELICOPTER_FORCE_TRIM_RELEASE_BUTTON_SET` | [0]: Bool | Set the helicopter force trim release button on (1) or off (0). When it is true (1) the link between the user joystick and the cyclic is broken, and the user can move the joystick freely while the helicopter cyclic control will be "frozen" at its current position. This allows the user to move the trimmer, press this button and set the joystick to the physical center, then release this button to restore the link between the joystick and the cyclic again - but now from this new point of cyclic-vs-joystick position. |
| {{< anchor id="INCREASE_HELO_GOV_BEEP" />}}`INCREASE_HELO_GOV_BEEP` | `KEY_HELI_BEEP_INCREASE` | [0]: value<span></span>[1]: engine | If the helicopter has an engine trimmer, this event can be used to increase the nominal engine/rotor RPM that the governor is trying to maintain for the indexed engine.<span></span>The amount that the trim will be adjusted by is set using the [`engine_trim_rate`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_rate) CFG parameter, and the min and max achievable values are set using [`engine_trim_min`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_min) and [`engine_trim_max`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_max). Alternatively, you may supply a value that will override that set in the [`engine_trim_rate`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_rate) CFG parameter (the min and max values will still be used).<span></span>An engine index of 0 targets *all* engines, and any other value targets that specific engine. |
| {{< anchor id="QUICK_TRIM" />}}`QUICK_TRIM` | `KEY_QUICK_TRIM` | [0]: Bool | If true (1) then assistance to automatically trim your helicopter has been enabled, if false (0) then it has not. |
| {{< anchor id="SET_HELO_GOV_BEEP" />}}`SET_HELO_GOV_BEEP` | `KEY_HELI_BEEP_SET` | [0]: value<span></span>[1]: engine | This is used to set the helicopter engine trimmer to the given value directly as a negative or positive deviation from 1, where 1 is the rated nominal engine {{< glossterm >}}rpm{{< /glossterm >}}.<span></span>The final engine trimmer value will be limited according to the [`engine_trim_min`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_min) and [`engine_trim_max`](../../../content-configuration/cfg-files/flight_model.cfg/#engine_trim_max) settings.<span></span>An engine index of 0 targets *all* engines, and any other value targets that specific engine. |

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### Cyclic

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| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="AXIS_CYCLIC_LATERAL_SET" />}}`AXIS_CYCLIC_LATERAL_SET` | `KEY_AXIS_CYCLIC_LATERAL_SET` | [0]: Set the lateral cyclic (-16384 to 16384) | Set the lateral cyclic axis as a value between -16384 and 16384. |
| {{< anchor id="AXIS_CYCLIC_LONGITUDINAL_SET" />}}`AXIS_CYCLIC_LONGITUDINAL_SET` | `KEY_AXIS_CYCLIC_LONGITUDINAL_SET` | [0]: Set the longitudinal cyclic (-16384 to 16384) | Set the longitudinal cyclic axis. |
| {{< anchor id="CYCLIC_LATERAL_LEFT" />}}`CYCLIC_LATERAL_LEFT` | `KEY_CYCLIC_LATERAL_LEFT` | N/A | Change the lateral cyclic (left) by -0.098 when pressed. If held down, the change will happen more rapidly. |
| {{< anchor id="CYCLIC_LATERAL_RIGHT" />}}`CYCLIC_LATERAL_RIGHT` | `KEY_CYCLIC_LATERAL_RIGHT` | N/A | Change the lateral cyclic (right) by 0.098 when pressed. If held down, the change will happen more rapidly. |
| {{< anchor id="CYCLIC_LONGITUDINAL_DOWN" />}}`CYCLIC_LONGITUDINAL_DOWN` | `KEY_CYCLIC_LONGITUDINAL_DOWN` | N/A | Change the longitudinal cyclic (down) by -0.049 when pressed. If held down, the change will happen more rapidly. |
| {{< anchor id="CYCLIC_LONGITUDINAL_UP" />}}`CYCLIC_LONGITUDINAL_UP` | `KEY_CYCLIC_LONGITUDINAL_UP` | N/A | Change the longitudinal cyclic (up) by 0.049 when pressed. If held down, the change will happen more rapidly. |

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### Throttle Control

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| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="AXIS_HELICOPTER_THROTTLE1_SET" />}}`AXIS_HELICOPTER_THROTTLE1_SET`<span></span>{{< anchor id="AXIS_HELICOPTER_THROTTLE2_SET" />}}`AXIS_HELICOPTER_THROTTLE2_SET` | `KEY_AXIS_HELICOPTER_THROTTLE1_SET`<span></span>`KEY_AXIS_HELICOPTER_THROTTLE2_SET` | [0]: Throttle value (0 to 16384) | Set the throttle 1 or 2 value from 0 to 1 (interpolated from the 0 to 16384 input). |
| {{< anchor id="AXIS_HELICOPTER_THROTTLE_SET" />}}`AXIS_HELICOPTER_THROTTLE_SET` | `KEY_AXIS_HELICOPTER_THROTTLE_SET` | [0]: Throttle value (0 to 16384) | Set all throttles to a value from 0 to 1 (interpolated from the 0 to 16384 input). |
| {{< anchor id="HELICOPTER_THROTTLE1_CUT" />}}`HELICOPTER_THROTTLE1_CUT`<span></span>{{< anchor id="HELICOPTER_THROTTLE2_CUT" />}}`HELICOPTER_THROTTLE2_CUT` | `KEY_HELICOPTER_THROTTLE1_CUT`<span></span>`KEY_HELICOPTER_THROTTLE2_CUT` | N/A | Cut throttle 1 or 2. |
| {{< anchor id="HELICOPTER_THROTTLE1_DEC" />}}`HELICOPTER_THROTTLE1_DEC`<span></span>{{< anchor id="HELICOPTER_THROTTLE2_DEC" />}}`HELICOPTER_THROTTLE2_DEC` | `KEY_HELICOPTER_THROTTLE1_DEC`<span></span>`KEY_HELICOPTER_THROTTLE2_DEC` | [0]: Decrement value (0 to 16384) | By default this will decrement throttle 1 or 2 by 1/128, to a minimum of 0. If you provide an input parameter then this will be internally normalised to a value between 0 and 1 and used to decrement instead. |
| {{< anchor id="HELICOPTER_THROTTLE1_FULL" />}}`HELICOPTER_THROTTLE1_FULL`<span></span>{{< anchor id="HELICOPTER_THROTTLE2_FULL" />}}`HELICOPTER_THROTTLE2_FULL` | `KEY_HELICOPTER_THROTTLE1_FULL`<span></span>`KEY_HELICOPTER_THROTTLE2_FULL` | N/A | Set throttle 1 or 2 to full. |
| {{< anchor id="HELICOPTER_THROTTLE1_INC" />}}`HELICOPTER_THROTTLE1_INC`<span></span>{{< anchor id="HELICOPTER_THROTTLE2_INC" />}}`HELICOPTER_THROTTLE2_INC` | `KEY_HELICOPTER_THROTTLE1_INC`<span></span>`KEY_HELICOPTER_THROTTLE2_INC` | [0]: Increment value (0 to 16384) | By default this will increment throttle 1 or 2 by 1/128, to a maximum of 1. If you provide an input parameter then this will be internally normalised to a value between 0 and 1 and used to increment instead. |
| {{< anchor id="HELICOPTER_THROTTLE1_SET" />}}`HELICOPTER_THROTTLE1_SET`<span></span>{{< anchor id="HELICOPTER_THROTTLE2_SET" />}}`HELICOPTER_THROTTLE2_SET` | `KEY_HELICOPTER_THROTTLE1_SET`<span></span>`KEY_HELICOPTER_THROTTLE2_SET` | [0]: Throttle value (0 to 16384) | Set throttle 1 or 2 based on the input value. The input is between 0 and 16384, which will be normalised to a value between 0 and 1. |
| {{< anchor id="HELICOPTER_THROTTLE_CUT" />}}`HELICOPTER_THROTTLE_CUT` | `KEY_HELICOPTER_THROTTLE_CUT` | N/A | Cut all throttles. |
| {{< anchor id="HELICOPTER_THROTTLE_DEC" />}}`HELICOPTER_THROTTLE_DEC` | `KEY_HELICOPTER_THROTTLE_DEC` | [0]: Decrement value (0 to 16384) | By default this will decrement all throttles by 1/128, to a minimum of 0. If you provide an input parameter then this will be internally normalised to a value between 0 and 1 and used to decrement instead. |
| {{< anchor id="HELICOPTER_THROTTLE_FULL" />}}`HELICOPTER_THROTTLE_FULL` | `KEY_HELICOPTER_THROTTLE_FULL` | N/A | Set all throttles to full. |
| {{< anchor id="HELICOPTER_THROTTLE_INC" />}}`HELICOPTER_THROTTLE_INC` | `KEY_HELICOPTER_THROTTLE_INC` | [0]: Increment value (0 to 16384) | By default this will increment all throttles by 1/128, to a maximum of 1. If you provide an input parameter then this will be internally normalised to a value between 0 and 1 and used to increment instead. |
| {{< anchor id="HELICOPTER_THROTTLE_RELATIVE_AXIS" />}}`HELICOPTER_THROTTLE_RELATIVE_AXIS` | `KEY_HELICOPTER_THROTTLE_RELATIVE_AXIS` | N/A | Increment or decrement the throttle based on the speed and the distance of the interaction from the user device (values are clamped between 0 to 16384).<span></span>**NOTE**: This is primarily for the PS5 controller touch-pad, but should work with any touch-input. |
| {{< anchor id="HELICOPTER_THROTTLE_SET" />}}`HELICOPTER_THROTTLE_SET` | `KEY_HELICOPTER_THROTTLE_SET` | [0]: Throttle value (0 to 16384) | Set all throttles based on the input value. The input is between 0 and 16384, which will be normalised to a value between 0 and 1. |

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### Rotor Control

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| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="AXIS_ROTOR_BRAKE_SET" />}}`AXIS_ROTOR_BRAKE_SET` | `KEY_AXIS_ROTOR_BRAKE_SET` | [0]: Brake Lever position (0 to 16384) | Set the rotor brake. This takes a value between 0 to 16384, which will be interpreted by the simulation as a percentage where 0 is fully off and 16384 is fully on. |
| {{< anchor id="ROTOR_AXIS_TAIL_ROTOR_SET" />}}`ROTOR_AXIS_TAIL_ROTOR_SET` | `KEY_AXIS_TAIL_ROTOR_SET` | [0]: Brake Lever Position (0 to 16384) | Set the tail (or second) rotor brake. This takes a value between 0 to 16384, which will be interpreted by the simulation as a percentage where 0 is fully off and 16384 is fully on. |
| {{< anchor id="ROTOR_BRAKE" />}}<span class="legacy">`ROTOR_BRAKE`</span> | `KEY_ROTOR_BRAKE` | [0]: Bool | Sets rotor brake switch on. Deprecated in favour of [`ROTOR_BRAKE_ON`](#ROTOR_BRAKE_ON). |
| {{< anchor id="ROTOR_BRAKE_LOCK_SET" />}}`ROTOR_BRAKE_LOCK_SET` | `KEY_ROTOR_BRAKE_LOCK_SET` | [0]: Bool | Sets the rotor brake lock to on (1) or off (0). |
| {{< anchor id="ROTOR_BRAKE_OFF" />}}`ROTOR_BRAKE_OFF` | `KEY_ROTOR_BRAKE_OFF` | N/A | Switches off the rotor brake switch . |
| {{< anchor id="ROTOR_BRAKE_ON" />}}`ROTOR_BRAKE_ON` | `KEY_ROTOR_BRAKE_ON` | N/A | Switches on the rotor brake switch . |
| {{< anchor id="ROTOR_BRAKE_TOGGLE" />}}`ROTOR_BRAKE_TOGGLE` | `KEY_ROTOR_BRAKE_TOGGLE` | N/A | Toggle the rotor brake switch between on (1) and off (0). |
| {{< anchor id="ROTOR_CLUTCH_SWITCH_SET" />}}`ROTOR_CLUTCH_SWITCH_SET` | `KEY_ROTOR_CLUTCH_SWITCH_SET` | [0]: Bool | Sets the rotor clutch switch to on (1) or off (0). |
| {{< anchor id="ROTOR_CLUTCH_SWITCH_TOGGLE" />}}`ROTOR_CLUTCH_SWITCH_TOGGLE` | `KEY_ROTOR_CLUTCH_SWITCH_TOGGLE` | N/A | Toggles the rotor clutch switch between on (1) and off (0). |
| {{< anchor id="ROTOR_GOV_SWITCH_OFF" />}}`ROTOR_GOV_SWITCH_OFF` | `KEY_ROTOR_GOV_SWITCH_OFF` | [0]: engine | Sets the rotor governor switch to off (0).<span></span>An index of 0 targets *all* engines, and any other value targets that specific engine. |
| {{< anchor id="ROTOR_GOV_SWITCH_ON" />}}`ROTOR_GOV_SWITCH_ON` | `KEY_ROTOR_GOV_SWITCH_ON` | [0]: engine | Sets the rotor governor switch to on (1).<span></span>An index of 0 targets *all* engines, and any other value targets that specific engine. |
| {{< anchor id="ROTOR_GOV_SWITCH_SET" />}}`ROTOR_GOV_SWITCH_SET` | `KEY_ROTOR_GOV_SWITCH_SET` | [0]: Bool<span></span>[1]: engine | Sets the rotor governor switch to on/off (1,0).<span></span>An index of 0 targets *all* engines, and any other value targets that specific engine. |
| {{< anchor id="ROTOR_GOV_SWITCH_TOGGLE" />}}`ROTOR_GOV_SWITCH_TOGGLE` | `KEY_ROTOR_GOV_SWITCH_TOGGLE` | [0]: engine | Toggles the rotor governor switch between on (1) and off (0).<span></span>An index of 0 targets *all* engines, and any other value targets that specific engine. |
| {{< anchor id="ROTOR_LATERAL_TRIM_DEC" />}}`ROTOR_LATERAL_TRIM_DEC` | `KEY_ROTOR_LATERAL_TRIM_DEC` | N/A | Decrements the roll (lateral) rotor trim by the amount specified by the parameter [`right_trim_step`](../../../content-configuration/cfg-files/flight_model.cfg/#right_trim_step). |
| {{< anchor id="ROTOR_LATERAL_TRIM_INC" />}}`ROTOR_LATERAL_TRIM_INC` | `KEY_ROTOR_LATERAL_TRIM_INC` | N/A | Increments the roll (lateral) rotor trim by the amount specified by the parameter [`right_trim_step`](../../../content-configuration/cfg-files/flight_model.cfg/#right_trim_step). |
| {{< anchor id="ROTOR_LATERAL_TRIM_SET" />}}`ROTOR_LATERAL_TRIM_SET` | `KEY_ROTOR_LATERAL_TRIM_SET` | [0]: Pitch angle (+/- 16384) | Sets the roll (lateral) rotor trim to a value between -1 and 1 (interpolated from the +/-16384 input value). |
| {{< anchor id="ROTOR_LONGITUDINAL_TRIM_DEC" />}}`ROTOR_LONGITUDINAL_TRIM_DEC` | `KEY_ROTOR_LONGITUDINAL_TRIM_DEC` | N/A | Decrements the pitch (longitudinal) rotor trim by the amount specified by the parameter [`front_trim_step`](../../../content-configuration/cfg-files/flight_model.cfg/#front_trim_step). |
| {{< anchor id="ROTOR_LONGITUDINAL_TRIM_INC" />}}`ROTOR_LONGITUDINAL_TRIM_INC` | `KEY_ROTOR_LONGITUDINAL_TRIM_INC` | N/A | Increments the pitch (longitudinal) rotor trim by the amount specified by the parameter [`front_trim_step`](../../../content-configuration/cfg-files/flight_model.cfg/#front_trim_step). |
| {{< anchor id="ROTOR_LONGITUDINAL_TRIM_SET" />}}`ROTOR_LONGITUDINAL_TRIM_SET` | `KEY_ROTOR_LONGITUDINAL_TRIM_SET` | [0]: Pitch angle (+/- 16384) | Sets the pitch (longitudinal) rotor trim to a value between -1 and 1 (interpolated from the +/-16384 input value). |
| {{< anchor id="ROTOR_TRIM_RESET" />}}`ROTOR_TRIM_RESET` | `KEY_ROTOR_TRIM_RESET` | N/A | Resets the rotor trim values to their default. |
| {{< anchor id="TAIL_ROTOR_DECR" />}}`TAIL_ROTOR_DECR` | `KEY_TAIL_ROTOR_DECR` | N/A | Decrements the tail rotor by 0.1. |
| {{< anchor id="TAIL_ROTOR_INCR" />}}`TAIL_ROTOR_INCR` | `KEY_TAIL_ROTOR_INCR` | N/A | Increments the tail rotor by 0.1. |

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### Engine Control

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| Key Name | Event ID | Parameters | Description |
|---|---|---|---|
| {{< anchor id="HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_OFF" />}}`HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_OFF`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_OFF" />}}`HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_OFF` | `KEY_HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_OFF`<span></span>`KEY_HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_OFF` | N/A | For a helicopter, toggle the engine 1/2 governor switch between ON (1) and OFF (0). |
| {{< anchor id="HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_ON" />}}`HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_ON`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_ON" />}}`HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_ON` | `KEY_HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_ON`<span></span>`KEY_HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_ON` | N/A | For a helicopter, set the engine 1/2 governor switch ON. |
| {{< anchor id="HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_TOGGLE" />}}`HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_TOGGLE`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_TOGGLE" />}}`HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_TOGGLE` | `KEY_HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_TOGGLE`<span></span>`KEY_HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_TOGGLE` | N/A | For a helicopter, set the engine 1/2 governor switch OFF. |
| {{< anchor id="HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_SET" />}}`HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_SET`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_SET" />}}`HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_SET` | `KEY_HELICOPTER_ENGINE_1_GOVERNOR_SWITCH_SET`<span></span>`KEY_HELICOPTER_ENGINE_2_GOVERNOR_SWITCH_SET` | [0]: Bool | For a helicopter, set the engine 1/2 governor switch to either ON (1) or OFF (0). |
| {{< anchor id="HELICOPTER_ENGINE_1_BEEP_TRIM_INCREASE" />}}`HELICOPTER_ENGINE_1_BEEP_TRIM_INCREASE`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_BEEP_TRIM_INCREASE" />}}`HELICOPTER_ENGINE_2_BEEP_TRIM_INCREASE` | `KEY_HELICOPTER_ENGINE_1_BEEP_TRIM_INCREASE`<span></span>`KEY_HELICOPTER_ENGINE_2_BEEP_TRIM_INCREASE` | [0]: value | For a helicopter, increase the engine 1/2 trim RPM by the given value amount. |
| {{< anchor id="HELICOPTER_ENGINE_1_BEEP_TRIM_DECREASE" />}}`HELICOPTER_ENGINE_1_BEEP_TRIM_DECREASE`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_BEEP_TRIM_DECREASE" />}}`HELICOPTER_ENGINE_2_BEEP_TRIM_DECREASE` | `KEY_HELICOPTER_ENGINE_1_BEEP_TRIM_DECREASE`<span></span>`KEY_HELICOPTER_ENGINE_2_BEEP_TRIM_DECREASE` | [0]: value | For a helicopter, decrease the engine 1/2 trim RPM by the given value amount. |
| {{< anchor id="HELICOPTER_ENGINE_1_BEEP_TRIM_SET" />}}`HELICOPTER_ENGINE_1_BEEP_TRIM_SET`<span></span>{{< anchor id="HELICOPTER_ENGINE_2_BEEP_TRIM_SET" />}}`HELICOPTER_ENGINE_2_BEEP_TRIM_SET` | `KEY_HELICOPTER_ENGINE_1_BEEP_TRIM_SET`<span></span>`KEY_HELICOPTER_ENGINE_2_BEEP_TRIM_SET` | [0]: value | For a helicopter, set the engine 1/2 trim RPM to the given value. |

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