What is the ideal centre of gravity position with a jammed elevator?

The ideal center of gravity position with a jammed elevator is located aft in the aircraft. When the elevator is jammed, it can no longer be used to control pitch effectively, which makes it critically important to have the center of gravity positioned in a way that allows for better stability and control.

An aft center of gravity can enhance the pitch stability of the aircraft during situations where typical control surfaces are not functioning optimally. This position helps to reduce the risk of stalling and aids in maintaining level flight, as it allows the aircraft to naturally tend to maintain its nose attitude without requiring elevator input.

The other positions do not provide the same level of control under these circumstances. For example, a forward center of gravity could make the aircraft nose-heavy and more challenging to control, increasing the risk of a stall or making it harder to maintain level flight. A centrally located center of gravity might not enhance stability as effectively as an aft position does in this specific situation. Therefore, placing the center of gravity aft is a strategic approach to ensure better handling characteristics when the elevator is compromised.