AMSMAN
Topic Author
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Joined: Mon Jan 28, 2002 6:24 pm

How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 8:37 pm

Ive noticed that, even though pilots cant see their nose gear, they still manage to keep the wheels exactly on the yellow taxi line, right up onto the gate!!!

How is this done when they cant see their nose gear???

AMSMAN
Aer Lingus, Proud to be Irish.
 
cosync
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 9:31 pm

no special technique just hours and hours of natural practice. imagine if u had been doin it for about a total of 400 hours.
 
saintsman
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 9:35 pm

They also 'feel the bumps' as they go over the taxi lights.
 
cdfmxtech
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 9:36 pm

Some pilots are equipped with whats called BPTGS (Body Part Taxi Guidance System).

The BPTGS is pretty simple. For instance, when taxiing the B737, I've been taught to keep the centerline in line with my inner right thigh. This differs on other aircraft such as the B757 for me.

I'm just a tech who taxies, so maybe a "real" pilot can shed some light. But most that I have talked to use the BPTGS method  Big thumbs up
 
ewr757
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 9:56 pm



I use the BPTGS system as well.
 
Staffan
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 10:27 pm

It's like not hitting the curb with the front wheel when you park the car, you can't see the wheel, but you get a feeling for where it is.



 
PPGMD
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 11:38 pm

BPTGS is the easiest way of doing it.
At worst, you screw up and die.
 
cosync
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RE: How Do Pilots Stay On The Taxi Line?

Mon Mar 18, 2002 11:59 pm

do u know how funny that sounds to me.
Body part taxi guidance system. heheheh i mean come on. i but a mechanic invented that name. sounds like a big electronic system, that uses an eyeball on the nosewhell to display on a little screen in the cockpit. hehehehe.
 
VC-10
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RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 12:15 am

The technique is generally to have the centre line to 'run up the inside of your inbd leg. I have used this as a guide on the A340, DC10 & 747.

The A346 has two taxi aid camera's, one at the top of the fin that gives you a view of the wing upper surface to between the indb & otbd engines to fwd of the nose and, providing the flaps are up the MGL. On the screen there are markers that indicate the MLG Ctr line.

The other camera is aft of the nose gear and looks fwd at the back of the NLG and so the taxiway centreline.

When switched on the views are shown on the ND with the fin view taking up the top 2/3rds of the screen and the remaining 1/3 showing the fwd camera view.
 
VC-10
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RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 12:28 am

The other technique with the 747 can be seen in the photo below. When you are correctly position in the seat if you line up the taxi-way centre line with the bottom of the slope that can be seen on the glareshield you will be correctly postioned on the taxiway.


Click for large version
Click here for full size photo!

Photo © Craig Murray

 
NKP S2
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RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 2:57 am

On smaller jets ( 737, "baby buses" ) it's pretty much the same for me, body parts and all. On the 757/767, we're initially taught to center our crotches on the taxi line. Easier to learn at night IMO as the use of the light beam from the nosegear mounted taxi light(s) gives confirmation of your centering and you can adjust and learn from there. Since the 757 nose gear is about 1/2 mile behind the cockpit, turning requires a fair amount of compensation for this fact, and I "discovered" a good way of intially judging the location: The angled runway turn-off lights are nosegear mounted; so I would roughly align the beam with the angled line that runs from the intersecting taxiway to the one I'm on-- that told me my nosegear was pretty much at the point of the two lines intersecting. Even so, it felt odd at first, especially on narrow taxiways, having my butt over the grass when making a 90 degree turn. Much more so a DC10 and especially the Concorde, I imagine.
 
Night_Flight
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RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 5:16 am

The Piper Seminole's I fly and some other aircraft have a small mirror on the left engine to view the nose-gear's position.

This mirrior also allows the pilot to view the nose-wheel's position on the center line if needed.
Remember when sex was safe and flying was dangerous?
 
SkyGuy11
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RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 12:31 pm

QUOTE:
"It's like not hitting the curb with the front wheel when you park the car, you can't see the wheel, but you get a feeling for where it is."

Crap! I hit the curb all the time  Smile.

Another technique works quite well for me and it gets better as the planes go up in size. You try to 'put it between your legs'. Simply, instead of trying so hard to keep the midline of the plane directly over the line, try to put the line between your legs. You're close enough to the center of the plane for it to not make a difference. This especially helps when on final approach and you are trying to track the centerline.
.
 
ThirtyEcho
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RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 12:54 pm

There are plenty of taxiways with no centerline. So let me rephrase the question: How can you go up your driveway if you can't see your car's wheels? Same sorta thing.
 
Guest

RE: How Do Pilots Stay On The Taxi Line?

Tue Mar 19, 2002 2:21 pm

In my Piper Warrior I don't think it is that severly difficult, or that big of a deal. But when I pull up to the pumps, my wingtip comes about 18" from a light pole lighting the fueling/deicing area, making my line tracking very important. In that situation I use the "BPTGS." I haven't heard it called that befor, but I'll go along with it!

Cameron
 
Guest

RE: How Do Pilots Stay On The Taxi Line?

Fri Mar 22, 2002 1:49 pm

We just hover in the choppers

Other light aircraft pilots that can not see over the cockpit will do s turns (drive like a drunk) On the taxi way and look out our side windows.
 
TAA_Airbus
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RE: How Do Pilots Stay On The Taxi Line?

Fri Mar 22, 2002 3:03 pm

Can you see the wheels in your car??????

They look ahead, keep the plane pointed towards where they are going and the wheels take care of themselves!
 
bio15
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RE: How Do Pilots Stay On The Taxi Line?

Fri Mar 22, 2002 11:54 pm

Taxiing the concorde. That's a thing to admire.

Click for large version
Click here for full size photo!

Photo © Remi Dallot


It's just a matter of reference points. "Ok, I'm over the river now, right turn"  Sad
Amen to concorde pilots.
-bio

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