戦闘妖精雪風 : Yukikaze
Sepecat Jaguar
As Requested By: mach-loop-lover
さらにこちらでは
Airplane Vortex
At the wings’ outermost extremities, the higher pressure air beneath is drawn toward the lower pressure air on top, resulting in a tight, circular flow that trails behind the aircraft like a pronged pair of sideways tornadoes. Under the right combination of temperature, pressure and humidity, moisture in the cores of these vortices condense and become visible, writhing behind the plane like gray vaporous snakes. The vortices are most pronounced when the wing is working hardest to produce lift. Thus, prime time for noticing these trails is during approach or departure. (Source)
Year’s smallest full moon looms large
A full moon backlights an airplane on its final approach to the Los Angeles International Airport over Whittier, Calif. on Jan. 15, 2014. While the moon appears to be large, it is actually the smallest full moon of 2014. Photo Nick Ut / AP
