you can also see those vortices when it's humid at F1 races as air is
forced across the rear wings when the cars are on long straights or
gentle curves.
LarryT
On 03/18/2017 11:26 AM, Floyd Thursby via Mercedes wrote:
Back in the late 90s i took a BA flt BOS-LHR on a 747, first class on
the upper deck. Pilots left the door open the whole flight, taxi,
takeoff, etc. and invited us in to come visit "once it is safe to move
around the cabin." Young pilots too, I was rossekinda surprised. I
sat with them for quite some time over the North Atlantic looking at
stars out the windows. It was fun.
On the wake turbulence aspect, that is related to lift and how an
airplane wing actually works -- it causes a circulation of air around
the wing when it is developing lift, and that circulating air rolls
off the tip of the wing (you can see the tip vortices when it is
humid) and then turns straight back and expands as it goes further
back. You can see that effect too when a big plane lands as it kicks
up dust and stuff along the runway, then will abruptly stop when lift
stops. But that rotating air persists for quite some time for quite
some distance and can really mess up anything that gets in it. I
recall seeing a vid of a Lear Jet tucking up behind a bigger jet (747
maybe) and then all the sudden FULL ROLL!!! It was at altitude and
the pilot was prepared for it, so it was a planned maneuver but it was
scary crazy to see that.
--FT
On 3/18/17 9:29 AM, Kaleb Striplin via Mercedes wrote:
I remember when I was a kid they used to let you go up to the
cockpit. Seems strange now.
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