How does the stabiliser need to be positioned for a properly balanced flight?

For a properly balanced flight, the stabiliser should be streamlined to the airflow. This position allows the stabiliser to maintain equilibrium and control over the aircraft's pitch attitude effectively. When the stabiliser is aligned correctly with the airflow, it ensures that aerodynamic forces are distributed evenly, allowing for stable flight without inducing unnecessary drag or turbulence.

In other configurations, such as pointing downwards or upwards, the stabiliser may generate unwanted forces that can disrupt balance and lead to potential stability issues in flight. Conversely, a fully deflected stabiliser would create extreme angles that would not be conducive to maintaining a balanced and smooth flight path, as it could either overstress the airframe or behave unpredictably, impacting the aircraft's handling characteristics. Thus, ensuring that the stabiliser is streamlined to the airflow is key to achieving a stable and balanced flight.