Flight Dynamics Modeling and Dynamic Stability Analysis of Tilt-Rotor Aircraft

Table 2

Hover mode eigenvalue validation.

Hover mode	Natural mode	Calculated	Reference[20]	Flight test
Longitudinal	Phugoid
	Pitch subsidence	-1.0	-0.5979	-1.32
	Heave subsidence	-0.17	-0.2086	-0.105
Lateral	Dutch roll
	Spiral subsidence	-0.1609	-0.0728	-0.102
	Roll subsidence	-2.6539	−1.1247	-1.23