swan_k1_hwing, base_link or wing lift issue if we set Q_ASSIST_SPEED=-1 0r less than 17m/s

I have completed the simulation of the Swan K1 H-Wing and observed that `Q_ASSIST_SPEED` was set to 100 m/s. This resulted in a false indication of sufficient lift, as the VTOL motors continued to provide assistance during forward flight to maintain altitude. Consequently, the battery drained rapidly, and the motor current in forward flight was even higher than in hover mode.

When I reduced `Q_ASSIST_SPEED` to 15 m/s or lower, the aircraft began losing altitude and eventually fell, indicating that the VTOL assist was no longer active. This suggests that the wings may not be generating enough lift to sustain fixed-wing flight on their own.

I am unsure whether this behavior is due to a limitation in the Gazebo simulation environment. Specifically, I suspect that the simulation may be accurately modeling propeller-generated forces but not generating aerodynamic lift from the wings as expected.

Reproduce the Swan K1 H-Wing simulation with Q_ASSIST_SPEED at 100 m/s and at 15 m/s or lower, then compare altitude, battery drain, and motor current. Inspect the Gazebo model's wing aerodynamics and VTOL-assist behavior; done means identifying whether the wings sustain fixed-wing flight or whether the simulation fails to model their lift.

Written by the indexing model from the issue text.