Re: [OT] Here's How You Drive a 747
- From: "ptooner" <nobody@xxxxxxxxxxx>
- Date: Tue, 20 Mar 2007 17:41:33 -0400
"mr.b" <mist@xxxxx> wrote in message
news:pan.2007.03.20.20.30.00.934014@xxxxxxxx
On Tue, 20 Mar 2007 17:52:51 +0000, Brian Running wrote:
Friend of mine sent me this link -- all bass players are interested in
flying, aren't they? Look at this cross-wind landing, and wonder if
the pilot's ever done this before. Yee haw!
http://www.youtube.com/watch?v=MY9Dr7U9ZWE&mode=related&search
I know this is entirely off topic and hardly anyone cares, but we do a fair
amount of that here so why not.
This isn't entirely a crosswind landing. Oh no my friends, it's much
better than that. 3 seconds into the clip you can see a windsock in the
lower right hand corner of the frame.
Well, firstly the crosswind of lack of it has nothing to do with this
approach. This is the old Hong Kong airport, and the sudden turn just
before touchdown was part of the approach. Also, based on the scale of what
I see I don't think that's a windsock you are referring to although I don't
know what it is.
This was a landing with both a
crosswind _and_ a tailwind component. Most flight schools do not
recommend landing with a tailwind. All private pilot candidates who
perform one, fail their exam.
You are correct at that level. OTOH, there is nothing unusual about it with
a big bird. If you are dealing with 10 kts down the runway and you plane
lands at 70 there is a huge difference between 60kts and 80kts actual ground
speed. With the same 10 kts there is very little difference between 180 kts
and 160 kts.
A partly-extended windsock like this
indicates winds in the 15kt range. This poor pilot has put himself in a
full-flap configuration with too much airspeed, too much groundspeed
-because of the tailwind- and too much altitude coming up to the
threshold. The uncorrected crosswind component has pushed him far left of
the centreline of the runway.
No, he had to have full flaps to get this steep (required) angle of attack
and you always land a heavy with full flaps. His wing-low technique is
called
'crabbing', a valid and effective technique taught to all pilots that
allows you to lose altitude in a hurry.
No, that's called "slipping". Crabbing is essentially making the airplane
fly level but a bit sideways. (crabs walk sideways) However, the most
obvious characteristic of a slip is you put left wing down and then kick
right rudder (or vice versa) to hold the nose on the desired heading. I
can't see any crossed controls in the video so I don't think he was doing
anything but following the usual approach path, although it is a very
unusual approach path there.
If you are interested in the fun approaches there you can find lots of
photos and videos by googling "Kai Tak airport".
Gerry
(First solo 1964, currently over 10,000 hours.)
I'll leave it to you all to
decide whether "losing altitude in a hurry" is a really good idea in a
300,000lb (empty) aircraft doing 170kts, less than 500ft from the ground.
Perhaps fear has scrambled his egg at this point. A go-around, had he
needed one at this point would have been...entertaining. In my
experience, dolts don't often get the left seat of a 747. Maybe the kid
in the right seat was driving. Perhaps the wind shifted on him while on
the approach. Who knows why he didn't go around.
.
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