Wings push air downward. The downward moving air can create a pocket of higher pressure when just above the surface, increasing lift available. Alternatively, it allows an equal amount of lift to be generated at lower speeds compared to when at higher altitudes, without changing wing configurations.
It can be used a couple different ways. I wouldn’t say “safer” necessarily, but DARPA for one is funding high capacity transport “aircraft” that travel by ground effect over oceans.
Latest Answers