reply to post by Zepherian
Zeph, we have all seen those pics, even back on page 4....and they were expained page after page after page.
I'll start with Picture #1. WHAT is it supposed to prove? The fact that an airplane can turn, and do, perhaps, a 360, as required by the
controller. See, when a controller gets too many airplanes in his/her airspace, he/she will attempt to 'control' the flights (on RADAR) to
'meter' them into the next sector.
You see, a controller is 'handling' a few flights, and wishing to 'hand them off' to another sector....they talk, on the radio to the airplane,
but al the while they are also on the "LandLine" (aka telephone) to the other controller, to establish a 'hand-off'.
Look....this is how ATC is working now, has worked before (even with RADAR) and will likely continue to work in the future.
The controllers have an area of responsiblity....and they CANNOT let an airplane into another's area unless they have verbally communicated with that
person, and the new person accepts the NEW responsibility for that airplane!
SO....you see airplanes in holding patterns....or maybe not a full holding pattern, but just told to do a '360'....it takes time, while the
crontrollers talk to each other.
Look....a 'Standard Rate' 360 degree turn takes about four minutes. A jetliner, at cruise speed, and using a maximum of 30 degrees of bank, will
take MORE than 4 minutes to complete a 360.
SOME standardized Holding Patterns, as printed on our charts, specify a MAXIMUM airspeed, say...210K....BECAUSE at higher airspeeds an aiplane in the
pattern might exceed the parameters of the holding space, and infringe on other airspace. Depending on the weight, some airplanes may not be able to
comply to, say....210K...without deploying slats/flaps. Now, we have extra drag, and resultant fuel burn to consider. And the decision to divert to
the Alternate Airport....becomes more prominent.
However, I doubt the audience is going to care about what airline pilots think about....most just want their favorite bev.
Point is, after a l;ong-winded explanation....the first photo is perfectly understandble, when you realize that ATC can cause a jetliner to make a
Other pictures?? Well, not sure where you live, but I happen to know that jets fly North/South and East/West....and all angles in between.