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If you don't fly the right speeds on final, you can miss your touchdown point by hundreds of feet, every time. Here's what you need to know...
The term "approach speed" can be slightly misleading. It's not the speed you'll fly all the way to the runway. Instead, think of your final approach as three stages of speed changes. Following this model will give you the best speed control for nailing your touchdown point:
How fast should you fly on final? Most aircraft flight manuals recommend a speed. However, if your manufacturer doesn't list a final speed in their flight manual, the FAA recommends that you fly 1.3 x Vso (stall speed in a landing configuration).
For a couple of examples, the Cirrus SR22T manual recommends 80-85 knots on final, and 79 knots crossing the threshold. The C172S POH recommends 60-70 knots with full flaps for a final approach speed.
As you turn final, set pitch and power for your final approach speed, and stabilize your descent to the runway. If you're constantly changing throttle settings to adjust altitude and airspeed, you might want to consider going around to try again.
A good rule of thumb for light, single-engine piston airplanes is to check that you're flying a stable approach at least 200 feet above the ground. Are you flying the correct approach speed, configured, on centerline, with minimal power changes, and a normal sink rate?
Now that you're stabilized on final approach speed and glidepath, you need to prepare for your next phase of the landing: threshold crossing speed.
Once you have no doubt that you'll make the runway, just before the threshold, slowly begin reducing the throttle. Not all aircraft manufacturers have a recommend threshold crossing speed, but as a rule-of-thumb, it's usually around 5 knots slower than your final approach speed in a light aircraft.
As you cross the threshold, keep reducing throttle, and start your transition to flare by slowly pitching up.
Technique for how and where to reduce power can change dramatically based upon each different type of airplane you fly. The best way to hone your skills in your plane is to go out and practice.
As you reach the final stage of speed change during your flare, you should be continually slowing the aircraft. In many single-engine piston airplanes, you'll be at idle power during the flare.
Your goal is to touch down just a few knots above stall speed. With just a few knots of airspeed to lose, you'll give yourself the best shot at nailing your touchdown point by being on-speed in the flare. If you continue descending to the runway close to approach speed, the extra knots of speed will be hard to bleed off during the flare because of ground effect.
You'll fly a faster approach speed than recommended with strong, gusting winds. Adding half of the gust factor to your final approach speed will ensure you're flying well above stall speed if you encounter wind shear. That's a good thing.
Because of this, you may also want to consider flying a faster threshold crossing speed and flare speed. The extra knots of airspeed will give your flight controls more effectiveness, helping with crosswind control.
What do you think? How do you slow down on short final? Tell us in the comments below.
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