Wake Vortex Separation Query
Thread Starter
Join Date: Jul 2001
Location: ישראל
Posts: 722
Likes: 0
Received 0 Likes
on
0 Posts
Wake Vortex Separation Query
This has probably been answered to death so apologies in advance to the thread police.
If a medium aircraft lines up on a runway from the start end (runway length apx 3000m) and a heavy lines up ahead and takes off from an intersection (lets say a quarter/fifth of the way down), how much timing would you apply?Also, would you start your stopwatch the second the heavy aircraft starts its takeoff roll or would you start timing at that aircraft's rotation?
If a medium aircraft lines up on a runway from the start end (runway length apx 3000m) and a heavy lines up ahead and takes off from an intersection (lets say a quarter/fifth of the way down), how much timing would you apply?Also, would you start your stopwatch the second the heavy aircraft starts its takeoff roll or would you start timing at that aircraft's rotation?
Join Date: Dec 1999
Location: LHR/EGLL
Age: 45
Posts: 4,401
Likes: 0
Received 0 Likes
on
0 Posts
In the UK,
We would apply the same as if they both departed from the threshold. We would only increase the separation if the second, lighter a/c departed from the intersection and the first, heavier a/c departed from the full length.
We apply separation rotation to rotation.
We would apply the same as if they both departed from the threshold. We would only increase the separation if the second, lighter a/c departed from the intersection and the first, heavier a/c departed from the full length.
We apply separation rotation to rotation.
On the subject of wake turbulence, why do some airports say "caution" even when there's 20 knots of crosswind blowing?
It it an "elf'n'safety" thing? i.e. ass covering.
Just wondering.
It it an "elf'n'safety" thing? i.e. ass covering.
Just wondering.
Join Date: Dec 1999
Location: LHR/EGLL
Age: 45
Posts: 4,401
Likes: 0
Received 0 Likes
on
0 Posts
We are not permitted to reduce wake turbulence separations (distance for inbounds, time for outbounds) for any reason, although reducing inbound spacing in periods of high crosswind/headwind is being worked on.
So, whenever the separation degrades to less than the minimum, we have to warn the a/c involved.
So, whenever the separation degrades to less than the minimum, we have to warn the a/c involved.
