Duck it chkt
Small plane towing a banner.
Probably flying at say 60 mph indicated airspeed into a 60 mph head wind.
One cancels the other so the ground speed is zero.
It is possible for a light plane to fly backwards if encountering a headwind higher than the indicated airspeed of the plane.
>A constant headwind of exactly the speed of the plane for several minutes
Vid is only a few second long
>If it was caused by a head wind, wouldn't that wind make the banner behind the plane flap around?
>It's completely static, just like the plane.
Does the banner flap around behind a plane when it is flying at 'normal' perceived speed.
No.
The plane is flying at normal speed relative to the air at that altitude.
Wind speed can vary in speed and direction greatly at different altitudes.
On the ground you might feel a gentle breeze 4-5 mph but at an altitude of 1000ft it might be 20 mph from a different direction.
Banners towed behind planes are attached to a vertical weighted bar that effectively acts like a flag pole.
In a strong gale force wind flags stick out quite stiff straight from the pole with not much flapping the same thing happens with a towed banner.
There is no airfoil shape with the banner that could impart any lift force.
>double the wind speed (encounter head wind) and double the friction.
The friction you refer too is called drag. Drag, and for that matter lift from a wing, increase with the square of the velocity. Double the speed and you quadruple lift and/or drag.
You should be more concerned about the memes anon's send you when you are locked up.
Why is the flag upside down?
Amusement and info-tainment gets the message across.