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HomeHomeDiscussionsDiscussionsiFly Wish-ListiFly Wish-ListHave iFly calcuates wind speed and directionHave iFly calcuates wind speed and direction
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12/22/2013 12:49 AM
 
iFlyy has enough data from what it is getting from groundspeed, groundtrack and heading to calculate the windspeed and direction, I believe. For certain it COULD computer that if the aircraft made a 360 degree turn (as I can do so reading groundspeed highest and lowest groundspeed and at what points of the compass those occur) but doubt it really needs even that maneuver to make the calculation.

How about implementing that? My guess is it's not a complex programming job.

Alex
 
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12/22/2013 8:10 AM
 

How would you calculate windspeed from groundspeed, track, and heading? As far as the iFly knows, track and heading are the same thing.

To make such a calculation, the user would need to input actual heading so iFly could compare it to groundtrack.

More specifically, since the windspeed vector is equal to the groundspeed vector minus the true airspeed vector, the user also needs to input enough data for the iFly to calculate the true airspeed.

So, it can be done (my 430W does it), but it cannot be done only with data already known by the iFly; it requires data input from the user.

 
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12/22/2013 8:08 PM
 

I haven't given this much thought, but suppose you could fly an exact 2 minute bank. Either you could tell the iFly when to start the two minute timer, or the iFly could pick. After the two minutes, if there was a wind, you shouldn't be over the same point you started over, right? The iFly could measure the GPS distance, and direction you are from when the two minutes started, multiply by 30 and it should give the distance and direction the wind would have blown you in an hour.

I don't know that I would ever use such a feature, but it seems possible if the pilot is able to hold a precise 2 minute bank.

 
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HomeHomeDiscussionsDiscussionsiFly Wish-ListiFly Wish-ListHave iFly calcuates wind speed and directionHave iFly calcuates wind speed and direction