# Aircraft Description & Functions

- [System Overview](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/system-overview.md)
- [Flight Modes](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/flight-modes.md)
- [Failsafe](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/failsafe.md): The X55 has a number of failsafe mechanisms to ease X55 recovery/prevent complete loss in the event that the X55 control is lost. The main failsafe topics are listed below. The failsafe triggers and a
- [Herelink Controller](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/herelink-controller.md)
- [Flight Control Software](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/flight-control-software.md): Flight control software is used with the X55 for mission planning, to update parameters, and to adjust settings of the aircraft.
- [QGC (QGroundControl) and Arcsky Control](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/flight-control-software/qgc-qgroundcontrol-and-arcsky-control.md)
- [Mission Planner (PC only)](https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions/flight-control-software/mission-planner-pc-only.md)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://arcsky.gitbook.io/x55-public-knowledge-base/aircraft-description-and-functions.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.