phillybaby,

Funtionally, wings and props are different things, even though they do their jobs in a similar way, and thus are measured a little differently, but not that differently, after all. In point of fact, though, thrust is not the amount of air that a prop moves, it is the amount of force it provides to move the plane. In this regard, the measures are similar: props make thrust, wings make lift. Both of these desired effects are balanced against negatives, or costs: the power consumed to get a given amount of thrust from a prop, the drag produced by a wing for a given amount of lift.

banktoturn