Comment by Dean on October 11, 2010 at 6:29pm

Atto gets around wind estimation with a trick I think is clever and has some other advantages, but no I absolutely didn't mean any sarcasm. I mean that if your crab angle is 45 degrees, then obviously the wind speed must be about equal to aircraft airspeed, and it is very typical for sUAS to cruise at 28 mph or so... thus I wrote "Yep, based on this I can easily see the winds must have been 28+ mph"

Dean

Comment by Tj Bordelon on October 11, 2010 at 8:05pm

I don't do it as good as some other methods I've heard folks using. For me, I have to circle the LZ once. Supposedly there's a way to know from only 2 measurements spaced a few seconds apart. The only requirement being that you have to change attitude... could be pitch, roll, yaw, whatever. And you can supposedly do it without a pitot. Now this seems like magic, but I've heard it's possible.

I can see myself doing it instantaneously by figuring out where my track SHOULD go (given pitot airspeed and heading) and get the difference between that and where I actually ended up.

PS - My pitot always gets clogged. I think it's just bad luck. Fortunately this is detectable and I revert to GPS airspeed and sound the warning bells.

Developer Comment by Doug Weibel on October 13, 2010 at 10:54am

What does your pitot tube get clogged with??? Bugs?

Comment by Tj Bordelon on October 13, 2010 at 4:23pm

@doug. No, it varies. One morning somehow dew got in after a landing and messed up my 2nd flight. Another morning it was dirt. Just bad luck lately.

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