# Autogyro Frame Builds

An Autogyro (opens new window) is a type of rotorary-wing (opens new window). Compared to other designs it possesses following advantages:

  • Ability to take off and land using only a very short runway (compared to an fixed-wing vehicle).
  • High resistance to weather conditions, especially gusts of wind.
  • Possession of a non-powered rotor enabling it to operate in an autorotation mode (one of the helicopter’s emergency modes as well). Consequently, it does not need to actively change a flight mode in case of failure (it does not need a parachute or other actively working devices). Its flight is thus inherently stable at all times.
  • Absence of a downwash (opens new window) during take-off or landing creating an unwanted swirling of dust.
  • Low lift-to-drag ratio (opens new window) that can be adjusted by construction parameters. This ability can be useful because while an unmanned autogyro cannot fly very far in the case of failure (as is the case of a conventional airplane), the flight is still safe and aircraft does not fall (as is typical for multicopter or helicopter).

PX4 supports several autogyro airframes. The complete set of supported configurations can be seen in Airframes Reference > Autogyro. This section contains build logs/instructions for assembling and configuring a number of Autogyro frames.