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The ground speed will vary, but the airspeed will not be affected by wind (except momentarily for gusts or shears). The poster I replied to was implying that d
by histriosum 7y ago
The ground speed will vary, but the airspeed will not be affected by wind (except momentarily for gusts or shears).
The poster I replied to was implying that due to the strong tailwind, they had to maintain an increased airspeed. That is incorrect. The airplane has no idea it is in a tailwind, and airspeed will be unchanged.
- JshWright 7y agoI don't think anyone other than you interpreted the comment that way.
- mritun 7y agoI did. Saying “everyone” when it’s just probably one person is not usually ok. It’s fine to say if you interpreted the comment in a certain way, and ok to be the outlier. But assuming your interpretation applies to others more broadly than it does, is counterproductive.
- JshWright 7y agoBoth comments were significantly downvoted at the time of my comment, which was what I was referring to. The original comment explicitly mentioned "relative airspeed", which I thought was pretty clear (it's the speed of the plane relative to the air that matters). I think calling it a "common misconception" is also assuming a lot.
- dTal 7y agoI think the root of disagreement here is that to you, as a pilot, "speed" means airspeed. But to a layperson, "speed" means groundspeed. So saying that an airplane with a tailwind "must go faster to keep enough air going over the wings" reads very strangely to you, as (although it is technically correct) it belies a groundspeed-first type of thinking that is a poor intuition for staying alive in a plane.
- pdonis 7y ago> The poster I replied to was implying that due to the strong tailwind, they had to maintain an increased airspeed. No, he wasn't. He explicitly said the opposite: "higher ground speed to keep the same relative air speed."
- danaliv 7y agoI think the confusion here is stemming in part from the fact that "relative airspeed" isn't a well-defined term. In aviation airspeed means the speed of the airplane through the air (modulo specifiers for true vs. indicated vs. calibrated airspeed).
- pdonis 7y ago> "relative airspeed" isn't a well-defined term The original was "relative air speed", which I would simply take as the way a person not familiar with aviation terminology would say "airspeed"--speed relative to the air.