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HomeHomeDiscussionsDiscussionsiFly Wish-ListiFly Wish-ListiFly calculate and report crosswind component?iFly calculate and report crosswind component?
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5/7/2018 10:24 PM
 

Greg's correct on both his comments.

The Crosswind component is is independent of the aircraft.

If there is a 25 knot component from the left no matter what the aircraft's and pilot's ability to handle it , or not handle it , may be,  it's still 25 knots.  

A runway with a 25 knot crosswind component is something me and my light sport should try landing in only as a very last resort. For some another pilot and plane could be no problem....but for either of us it would be great to get that number easily directly from tha AWAS, etc.

Yeah....ATIS wind reports can be very stale  But still having it tell me what the crosswind Component was 10 minutes ago is more useful than giving me separately the wind direction and wind speed and having to while on approach do the math or estimate to extract the crosswind COMPONENT..

 
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5/7/2018 10:32 PM
 

Hey Mike.....

The number, the Actual Crosswind component is totally independent of the plane. It’s up to the pilot to know, for example that  a 15 knot Crosswind component is something they and their particular plane can handle no sweat, or is pushing the pilot's or pilot's limits and maybe cal,s fir diverting or a go-around.

 

 Truly I’m puzzled why it’s not in the AWAS, etc. already .   Should be incredibly simple to implement. 

 

 
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5/7/2018 11:56 PM
 

It's not a number, but I see three places where the crosswind component can be easily guessed, as well as preferred runway.  Zoom in on any airport reporting weather, and the weather dot (green, blue, red, etc.) will have a wind barb sticking into it showing wind direction and speed, as well as the runways (to see all runways, zoom in close enough for iFly to place their enhanced depiction of the airport with all runways and runway numbers).  Same thing when you zoom into RealView.  You can also see the dot and wind barb when you call up the Airport Info screen, in the top right corner where the runways are depicted.


Jeff Nokomis Clark, Mooney M20G, iFly app on ASUS ZenPad Z8s, ASUS ZenFone AR, ASUS Windows 10 tablet, Stratux ADS-B w AHRS
 
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5/8/2018 3:42 PM
 

Thanks for drawing my attention to info in the zoomed in view, Jeff.

".....It's not a number, but I see three places where the crosswind component can be easily guessed...."

 

Yeah, but as for "easily guessed" ..... That guessing is already exactly what we're all already doing (or trying to remember a rule-of-thumb such as "If the wind differs from the runway heading by 15 degrees, the crosswind component is one-quarter (25%) of the wind velocity. If the wind makes a 45-degree angle with the runway, the crosswind component is three-quarters (75%) of the overall wind speed").... Guessing that while lining up the runway, watching my glide path, announcing "on final", lowing flaps, etc. And the last thing I want to be doing at that moment is zooming in on the diagram to get graphically nothing more than the AWAS gave me by audio (wind direction and speed.)

I still say it would be ridiculously simple for the AWAS (and ATIS, AWOS, etc)to calculate and report by audio "Crosswind component is 15 knots from the left with gusts to 20 for runway 30." Technology to do that has been available for decades if not longer and virtually at no cost. Almost inexplicable that it hasn't been done."

Wouldn't you rather have the AWOS, etc. just give you the crosswind component as it does with with the traditional pressure altitude report? (That is, ATIS doesn't give you the real altitude, plus humidity, plus temperature and depend on you to estimate the pressure altitude for yourself while on final. ;-) It gives you the derived number you need. Why not do it for cross-wind component, as it's a trivial instant computation for the most primitive automated system at a trivial development cost. IMO odd and almost inexcusable it's not done.

And if iFly could extract and calculate that from the METAR data it gets and show it on our screen, that would be a start while waiting for the FAA to mandate it for 2050. ;-)

Alex

 
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5/8/2018 9:48 PM
 

I could almost see the ability to have this on an ATIS, as the controllers specify the runway in use, and can therefore specify the appropriate crosswind to use.  However, using the image posted above, there are 8 possible crosswind components to calculate, and more important specify, since we're free to choose whatever runway we like to land on if there's no one else there. 

 
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HomeHomeDiscussionsDiscussionsiFly Wish-ListiFly Wish-ListiFly calculate and report crosswind component?iFly calculate and report crosswind component?