In the material, stability about the longitudinal axis is identified as which type?

In the material, stability about the longitudinal axis is identified as which type?

• A. Longitudinal stability
• B. Lateral stability
• C. Vertical stability
• D. Directionational stability

Answer: (B)

Stability types are described by the axis about which the motion occurs. The longitudinal axis runs nose to tail, so a disturbance that causes rolling is a rotation in the lateral (left-right) plane. In the material you’re studying, that roll tendency is categorized as lateral stability, so stability about the longitudinal axis is identified as lateral stability. This naming emphasizes the motion’s footprint in the lateral plane rather than the axis itself. The other labels would correspond to disturbances about the other axes: stability about the lateral axis relates to pitch, about the vertical axis to yaw, and directional stability is another term for yaw tendencies. So, within that terminology, lateral stability is the correct identification for stability about the longitudinal axis.

Stability types are described by the axis about which the motion occurs. The longitudinal axis runs nose to tail, so a disturbance that causes rolling is a rotation in the lateral (left-right) plane. In the material you’re studying, that roll tendency is categorized as lateral stability, so stability about the longitudinal axis is identified as lateral stability. This naming emphasizes the motion’s footprint in the lateral plane rather than the axis itself. The other labels would correspond to disturbances about the other axes: stability about the lateral axis relates to pitch, about the vertical axis to yaw, and directional stability is another term for yaw tendencies. So, within that terminology, lateral stability is the correct identification for stability about the longitudinal axis.