In the Airport Traffic Pattern final speed with flaps at 40 degrees, what is the final speed?

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With full flaps set to 40 degrees, the final approach speed is chosen to provide a stable, controllable glide while keeping a safe margin above stall. This configuration creates maximum flap drag and lift, so you can fly slower without stalling and still have enough pitch control and energy to round out and land smoothly. In this training context, the standard final approach speed for that flap setting is 66 knots indicated airspeed.

Flying slower, around 60 KIAS, would push toward the lower end of controllable speed with full flaps, reducing margin and making the approach more susceptible to gusts or abrupt power changes. Going faster, like 70 or 76 KIAS, reduces the effectiveness of the flaps for descent and makes the approach less stable, carrying more energy into the flare and requiring more descent planning to land.