Rotor failure - Drumroll emergency mode #123

The autogyro main emergency mode is continuous autorotation flight using the main rotor. The problem emerges in the case of main rotor failure (seizure of bearing, shaft/pylon cracks, etc. ).

TF-G2 construction with the absence of a horizontal stabilizer is capable to do "drumroll landing". It is rotation mode that effectively slows the descent rate by converting a significant portion of potential energy to aerodynamically damped rotation.
The net result is significantly decreased impact speed compared to crashes where spinning is not present.

Unfortunately, this mode needs to be enabled by immediate deactivation of the main engine. This should be done by autopilot, because the human pilot is not capable of that without notice of previous signs of rotor failure.

Therefore the FC should deactivate the main engine if multiple signs of rotor failure are present.

• Rotor RPM is zero
• Rotor vibrations are not present
• Level flight cannot be achieved (Acceleration is close to zero - free fall)