How do configuration choices (flaps, gear) influence landing distance and approach speed?

• A. Flaps increase lift at lower speeds reducing approach speed and landing distance; gear down adds drag but necessary for landing; in some types, flaps cause more drag affecting landing distance
• B. Flaps increase lift but do not affect approach speed
• C. Gear down reduces drag and always shortens landing distance
• D. Flaps have no effect on landing distance or approach speed

Answer: (A)

Extending flaps and lowering the landing gear change the airplane’s lift and drag, which directly sets the approach speed you can safely fly and the energy you must dissipate on landing. Flaps increase wing camber, so you get more lift at lower airspeeds. That lets you fly a slower approach without stalling, which reduces the kinetic energy you carry into the landing, typically allowing a shorter landing distance because you touch down at a lower speed. At the same time, more flap deployment adds drag, which helps control descent rate and further slows the airplane during the approach.

Lowering the gear adds drag as well, since the wheels and gear doors create additional resistance. This drag is useful for managing airspeed on the approach and during the landing roll, but it’s also something that influences how quickly you can decelerate after touchdown. The gear must be down for a legitimate landing, so its effect on speed and energy management is a normal part of the calculation for landing distance.

So, the combination of flaps and gear directly affects approach speed and landing distance by altering lift, drag, and the energy you carry into and on the runway. The other options fall short because they ignore the way flaps increase lift at low speeds and the added drag they bring, or they misstate how gear configuration influences drag and landing distance.