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I believe I've heard of crashes because of that. You're saying jet engines in a strong head wind will cause acceleration, but a propeller driven plane would be slowed down, somewhat, if it is going straight and not in a dive? So, a plane is not...

Ironically, a head wind increases the airspeed (which can be dangerous as well). A sudden tailwind can decrease the airspeed and cause loss of lift or a stall, long before the airspeed becomes zero.

Ironically, a head wind increases the airspeed (which can be dangerous as well). A sudden tailwind can decrease the airspeed and cause loss of lift or a stall, long before the airspeed becomes zero.

The key word was "hover", which would be a ground speed of zero, and hence a headwind of zero. Which is a bit of a paradox as they assumed a strong headwind to match the "ground speed". Of course they just meant air speed.

Got it, thanks. But if air speed became zero in a crazy head wind that would cause a dangerous stall, correct? But ground speed is relative.

No, why? Cessna 150, flying slow at 50 knots air speed, into a 25 knot head wind, results in 25 knots ground speed; it's only bad news if the pilot did not account for that and runs out of fuel.

The key word was "hover", which would be a ground speed of zero, and hence a headwind of zero. Which is a bit of a paradox as they assumed a strong headwind to match the "ground speed". Of course they just meant air speed.

With a typical landing speed for a 737 at around 130 knots, this also neatly demonstrates the unreliability of the casual observer's claims about the estimated speed of any flying objects.

I couldn't find any obvious connection between Sedona and nuclear weapons testing or development. Wikipedia, Sedona, Arizona https://en.wikipedia.org/wiki/Sedona,_Arizona Maybe the nuclear tests in the 1950s and after in the American southwest...

New from BV: Dear everyone, Some new and very exciting news from the VASCO team! First, our machine-learning paper has been accepted for publication following peer review and is now in press. In this paper, we used machine learning to address...

This us a useful point to raise in discussions of "hovering planes." It will not be compelling to those who are determined to be fooled (or to pretend to ... it is always worth remembering that not everything people post on the Internet is an...

No, why? Cessna 150, flying slow at 50 knots air speed, into a 25 knot head wind, results in 25 knots ground speed; it's only bad news if the pilot did not account for that and runs out of fuel.

The first cloud picture looks like a fallstreak hole / hole punch cloud. Perhaps the falling cold air caused the spiral of ascending moist air to appear, which has been displaced as the cloud cover is moving.

That's Virga in the second photo. Precipitation that evaporates before it reaches the ground

I found a curly cloud! And whatever these are?