RAF General Service Practice Exam – Prep, Practice Questions & Study Guide

The term for when the wings of a plane point downwards in front view is "anhedral." This design feature is important in aircraft stability and control. Anhedral wings can reduce lateral stability, which might be desirable in certain aircraft designs, allowing for greater agility or responsiveness during maneuvers.

In contrast, the other terms used in the choices refer to different concepts in aerodynamics. Dihedral refers to wings that are angled upwards from the horizontal plane, contributing to improved lateral stability. Hydrodynamic pertains to the study of liquids in motion, which isn't applicable to the characteristics of airplane wings. Aerodynamic relates more broadly to the shape and design considerations to reduce drag and improve lift but doesn't specify wing orientation.