Triple Drift Correction | Holding Patterns with Wind
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- Опубліковано 14 жов 2024
- When conducting a holding procedure, it's important to take account for the crosswind on both the inbound and outbound legs. We take triple the correction used inbound, and apply that to the outbound leg. It's a strange concept, but here is why we do it, and how it looks from the cockpit.
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I learned this concept from a navy pilot in a CFI academy. really nice to see this posted for the world to see... one of the greatest rules of thumb for the IFR pilot!
I am a ii and I remember teaching this until one day in the plane I gave my student a 2 minute leg and all of the sudden the 3x wind correction took us way further into the hold so when we rolled onto the inbound leg we were far outside of it. I realized that day that this only works on 1 minute legs and it also doesn’t work on DME holds. But nonetheless very useful info and you can apply the concepts and adapt it to any hold
To fly a 2 minute leg holding pattern, you have to fly 1 minute of the outbound leg with 3x wind correction and the time left with 1x wind correction.
Let’s take now a 1’30 leg : you will fly 1x wind correction on the inbound, then turn to the outbound, then fly 3x the wind correction for 1 minute, and after the minute you will fly 30sec with 1x wind correction before turning to the inbound leg
@@ShurikAviation that’s one way to do it. For me it seems easier to teach if two min hold then do 1.5x correction of wind instead of 3x works perfectly
This video helped a ton, I was not taking into account the wind correction in the turns. This makes much more sense now
Being a student pilot this so important for me and I have just finished Lnav vnav or Lpv Lp approch video on your channel grate for me.
What is 96 heading determined by? How did you calculate that it would give a 10 degree correction? How to calculate what will give a 10 degree correction?
triple course correction, never thought about that, but makes total sense.
This is mindblowing!
LARS
Left turn hold you add to outbound leg for your wind correction
Right turns in holds you subtract from outbound leg
How to calculate what will give a 10 degree correction? What is 96 heading determined by? How did you calculate that it would give a 10 degree correction?
@@1Mr.Legend1 LARS is just to help calculate for a teardrop entry. WCA is the 3x rule.
What nonsense is this? He should tell me how he found 10 degrees.@@jafarelmetioui6338
I’ve always wondered why a hold is done the way it’s done. Is there really no simpler way to keep an airplane within a defined area of airspace?
If the wind is the other way, would the GPS-AP end up making a higher than standard rate turn on the other side or would it preemptively reduce the turn rate of the first turn so a standard rate turn will work on the second turn?
Yes, A coupled auto pilot isn't bound by the human limitation and best practice of always making turns standard rate turn. said differently, a coupled gps will do what ever necessary within the envelope to keep the little airplane on the magenta line
That is how the AP handles it, but what if you have G500 or G1000 without an AP? How do you know what rate turn you should execute without indication? Great job btw1
Wow another great one!
That was supercool! I had no clue how gps “cheated”
It’s cheating because it follows a ground track so to stay on it, the FD have to modulate the bank angle
1:59 What is 96 heading determined by? How did you calculate that it would give a 10 degree correction?
Because his selected course 106 but his actual ground track was 96. 106-96= 10
you did not understand. Where and how did he calculate that he needed to make a 10 degree correction? Why 10 degrees?
@@diegoencarnacion
@@1Mr.Legend1look at the approach plate, it’s saying that you should flying on a heading of 106. However due to the wind he has to adjust the heading so it doesn’t blow him away and 96 seems to be the magic number. The heading will shift constantly depending on how strong the winds are. If you’re flying in a glass cockpit it’ll have a wind correction diamond and you just line up the needle with it and you’ll get your correction
Why do you say 96? What is the calculation technique? How was 96 determined?
@@diegoencarnacion
Okay, how did you calculate that this is 96? Is this what's important. How ?
@@Frankie2751