Which control input is required for aggravated spins?

Aggravated spins occur when an aircraft enters a spin that is characterized by a higher rate of rotation and a more pronounced loss of altitude. This typically requires specific control inputs to exacerbate the spin conditions.

Using the stick forward of neutral combined with a pro-spin rudder input increases the yaw and roll rates, which are essential in provoking an aggravated spin. In a spin, the aircraft’s wings are stalled and the use of the pro-spin rudder (the rudder that aligns with the direction of the spin) enhances the aerodynamic imbalance, effectively deepening the spin. This combination of inputs pushes the aircraft further into an aerodynamic condition where it can't recover easily, thus resulting in an aggravated spin.

In contrast, full back stick or neutral stick inputs generally lead to a stall recovery or spin recovery, while inputs that are anywhere other than full aft would not sufficiently promote the conditions necessary for an aggravated spin. Each of these alternatives would serve to limit or reverse the spin's intensity rather than increase it.