The rolling coefficient, sometimes written as C_l_delta_r, is a measure of the aircraft’s response to roll control inputs. It quantifies how the aircraft’s rolling moment (rotational force causing the aircraft to roll) changes with changes in the aileron or roll control surface deflection. It is a dimensionless coefficient and can be positive or negative, indicating the direction of roll and the effectiveness of the roll control surfaces.
- C’lr: This represents the change in the rolling coefficient concerning changes in weight (W) and velocity (V). The prime notation (‘) often denotes derivatives or changes concerning a specific variable. In this case, it suggests that C’lr is a derivative or change in the rolling coefficient with respect to changes in weight (W) and velocity (V).
- C’lrW: This term represents the contribution to the change in the rolling coefficient due to changes in aircraft weight (W). It quantifies how the rolling behavior of the aircraft changes as its weight changes.
- C’lrV: This term represents the contribution to the change in the rolling coefficient due to changes in velocity (V). It quantifies how the rolling behavior of the aircraft changes as its velocity changes.