# Autopilot

### What is an Autopilot?

In the simplest terms, an autopilot is a software package that is responsible for taking in a bunch of data about a robot's position/rotation in space and ultimately outputting signals to its motors to move through that space. Most autopilots are not limited to quadrotors. They can support other air-based devices (such as fixed-wing aircraft, helicopters, and blimps) and even ground or water vehicles like rovers, boats, and submarines.

### Popular Autopilots

#### [PX4](/drone-show-technology/autopilot/px4.md)

This is the autopilot that Verge Aero uses in both the [X1](/drone-show-hardware/drones/x1.md) and [X7](/drone-show-hardware/drones/x7.md). It is an open source project that is built on top of the RTOS [NuttX](https://wiki.droneshow.software/index.php?title=NuttX\&action=edit\&redlink=1).

[Homepage](https://px4.io/)

[Github](https://github.com/PX4/PX4-Autopilot)

#### ArduPilot

Another very popular autopilot option. Also open source.

[Homepage](https://ardupilot.org/)

[ArduPilot](https://github.com/ArduPilot/ardupilot)


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