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10/6/2018 12:26 PM
 
Cobra wrote:

Frank,

In the beta area, about 80% of us understood this intuitively, but not everyone did, so you are not alone, and I'm sure the iFly team would be happy to find a solution that is unambiguous and intuitive for all.

In the meantime, see if this helps any:

The wind barb in the upper-right corner of the runway diagram pane shows you the wind vs all runways.  This is equivalent to the yellow arrow you added to your mocked-up diagram, so that information is already there.

Everything in the right pane of this window is helping you interpret how the wind is presenting at each of your landing options.  Wind direction with respect to the runway is shown as a vector (the arrow next to the runway number) and in head/tailwind and crosswind components (the green/red and yellow arrows, respectively).

All arrows in the right pane are presented with respect to the runway (i.e., with respect to your aircraft, if your aircraft is on final).  So the thin arrow next to the runway number 10R indicates "coming at me a little from the left".

For the two 10/28 runways, the colored ihighlights on the runway numbers indicate 10 is the preferred runway (green) and 28 is not (red).  10 is preferred because you get a 6 kt headwind landing on that runway (the green arrow pointing "down the runway").  There will also be a 3kt crosswind coming from the left (the yellow arrow).  If you were to choose 28, you'd have a 6kt tailwind (red arrow pointing "up the runway"), and a 3kt crosswind from the right.

It may not be intuitive to everyone when they first see it, but it *is* accurate, and should make sense once it's explained, even if it was confusing at first.

If you have suggestions on how that information could have been better indicated to make it more intuitive to you the first time you saw it, I'm sure the iFly team would like to hear that.

 


This is an excellent explanation.
 
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10/6/2018 12:37 PM
 
Frank Parker wrote:
Tim Taylor wrote:

I disagree. That makes no sense to me. And how can the wind be the same for the two opposite runways?

How could it not be!!!!!!!!


If I have a headwind landing on runway 5, I usually have a tailwind landing on runway 23. If I have a crosswind from the right landing on runway 5, I usually have a crosswind from the left landing on runway 23. The iFly depiction is what the pilot expects to experience when landing on that specific runway. It is runway specific, not airport specific. In addition to seeing a narrow arrow with the actual wind direction, iFly breaks it down into it's headwind/tailwind and crosswind component.

Did you take geometry or trigonometry? It's a right triangle with the wind being the hypotenuse of a right triangle. The legs are the headwind and crosswind component. After all, it's the crosswind component that pilots have to deal with. If your airplane has a demonstrated 15 knot crosswind component, wouldn't you want to see that the crosswind component for a given runway is 18 knots?

It's good to know the wind is a quartering headwind at 25 knots, but that alone doesn't tell you much. Even if you know it's at 60 degrees to the runway, do you want to pull out your old E6B to calculate the crosswind component?
 
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10/6/2018 2:28 PM
 

Tim.what makes you think the wind is changing direction when you change position? It does not of course, the only thing that changes is your position.

 
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10/6/2018 2:30 PM
 
Tim Taylor wrote:
The Quickview arrow is wind direction relative to the nose of your airplane when landing on the specified runway. If you click on that, the multiple arrows shown are the headwind/tailwind and crosswind components of the wind for each runway.

So I am landing on runway 01 with the wind reported a 090 and that pesky arrow is telling me the wind is from the side!

 
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10/6/2018 2:48 PM
 
Frank Parker wrote:

Tim.what makes you think the wind is changing direction when you change position? It does not of course, the only thing that changes is your position.

Thats correct. Your position changes when you change course. As does your RELATIVE position of the aircraft to the wind. 

 
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