What feature helps prevent the Cessna 152 from entering a spin?

The feature that helps prevent the Cessna 152 from entering a spin is the dihedral angle. The dihedral angle is the upward angle of the wings relative to the horizontal plane of the aircraft. This design feature enhances the aircraft’s lateral stability, providing a tendency for the airplane to return to level flight if it starts to bank or roll.

When the wings are at a dihedral angle, any unintentional rolling motion is corrected by the lift produced on the higher wing, generating a restoring moment that helps to level the aircraft. This is particularly important during flight maneuvers that might inadvertently induce a roll, as it diminishes the likelihood of entering a spin situation by promoting stability and a return to straight and level flight.

In contrast, while the horizontal stabilizer, vertical stabilizer, and rudder authority are important for overall stability and control of the aircraft, they do not directly prevent a spin like the dihedral angle does. The horizontal stabilizer contributes primarily to pitch stability, while the vertical stabilizer and rudder assist in yaw control. Each of these components plays a critical role in the aircraft's handling characteristics, but the dihedral angle specifically addresses the risk of spin by enhancing lateral stability.