Short Field Landing (Private Pilot Lesson 12c)
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- Опубліковано 7 вер 2024
- Explanation of how to execute a short field landing.
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One of the best short field landing explanations I've seen! Thanks, Cyndy!!
This is why I love training in a 172 with 40° flaps. Makes every landing short field.
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CYNDY! watched all your videos, about to take my CFI RIDE soon. When you get a chance can you please do chandelles, eights on pylons, lazy eights, and power off 180s? :)
Thank you!
You can't be serious. The FAA is clear that approaches should maintain a stabilized line of flight and not steepen on short final. See figure 9-23 Unstabilized approach pg 9-22 Airplane Flying Handbook, which shows the line of flight steepening after the obstacle.
Good video, but i see a lot of CFIs teaching it that way which isn't entirely correct. Do not retract the flaps when you land. the first notch of flaps gives you more lift than drag, as you start adding in more flaps (20° to 30°) you are creating MORE DRAG than lift. Therefore, if you keep your flaps in on landing, you'll create more aerodynamic breaking allowing you to come to a full stop in a shorter distance... which is the objective and why we teach short field landings.
Joe Aguiar but if you keep your flaps 30 aft touchdown ;you have more lift ;then your breaking is less efficient;don’t you think so?
This is incorrect.
@@shenglong9818 it depends on the type of aircraft, the configuration of the wings, high or low wing etc, the degree of flap available and many other factors. There is no one size fits all I am afraid. Cindy has done well here as an introduction to STOL. Thank you Ma'am.
For some model of the airplane it will be the case. As for the Cessna 172, it said on the POH short field landing part "For maximum brake effectiveness, retract the flaps...."
Moving flaps to zero will give the most benefit on a dry paved runway in a heavy condition, but with a dry paved runway you are least likely to need maximum braking. I feel like the retract flaps advice trickled down from large low drag aircraft where many paved runways are barely long enough.
With a light load or poor coefficient of traction(wet, dirt, grass, sand on concrete) there will be less benefit from retracting flaps, the drag is then worth more than the braking traction. Max braking force = weight*Ct, 100lb*0.6 vs 100lb*0.2, and that 100lb lift advantage from retracting flaps is only near touchdown speed and reduces rapidly.
Then on the momentum side, since flaps aren't magical there will be a time lag and by the time they have finished retracting there will again be little lift in either case as low momentum planes decelerate quickly and the ratio of drag to mass is much greater in a light-load condition. (momentum is a force-time function, energy is a force-distance function)
So as others have pointed out, your mileage may vary.
Capt,Cyndy by idling the power after clearing obstacle will make you Pancake landing,also consider wind Shadow ,Wind gradient, and plane load
thats exactly the point of a short field landing, you're not supposed to flare, you're supposed to land firmly on the main gear, that way it takes out a lot of your energy and helps you stop quickly