Topic Author
Posts: 1960
Joined: Tue Feb 06, 2001 5:56 pm

Pilots: How To Determine Runway Stength

Thu Mar 11, 2004 4:41 pm

Hello to all people who actually fly planes out there, I got a question:

When flying to or from some airport, how do you determine the maximum weight the runway can bear for your aircraft? Do you use PCN/ACN data or are there other means? I'm asking because for exsample the PCN data for KJFK (from collides with the maximum weight for a 747 configuration, from and I'm pretty lost.

It'd be great if someone could shed some light into this.

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Joined: Fri Mar 15, 2002 12:34 am

RE: Pilots: How To Determine Runway Stength

Thu Mar 11, 2004 4:46 pm

More important than runways are the taxiways. You also have to take into account the width, especially with wide bodied aircraft, because the undercarriage is so far apart you have to make sure that the taxiway edges are strong enough to spread the load.

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Joined: Sun Nov 23, 2003 7:09 am

RE: Pilots: How To Determine Runway Stength

Fri Mar 12, 2004 1:11 am

The "green book" of the NOS FLIP publications gives load bearing data for the runways. When planning a large airplane charter into an offline airport I would always start with this. Next step is a call to the airport manager's office which will have load bearing, width and turn radius on all taxiways and a bunch of other information I will need.

Butler Aviation in Reno once had an asphalt taxiway poured for access to their ramp which was just south of the airline terminal ramps. As soon as the barricades were removed the first plane taxiied across this 12500 lb-rated taxiway. It was an Alaska Airlines B-727-200

Happiness is not seeing another trite Ste. Maarten photo all week long.
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RE: Pilots: How To Determine Runway Stength

Fri Mar 12, 2004 6:52 am

Well, airliners don't do this but skiplane landing on lakes will make one pass dragging their skis on the surface and then go around. On the second pass the look at the tracks and see if there are any changes in the coloration.

What has happened when this has occured is that the ice underneath it cracked and the water is now comming up through the cracks and changing the color of the snow.

Definately don't land there, because once the airplane puts all of it's weight on the ice is will go through.
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Joined: Sun Sep 24, 2000 12:26 pm

RE: Pilots: How To Determine Runway Stength

Fri Mar 12, 2004 10:20 am

Pardon me for going a little off topic, but how do pilots determine the 'braking action' of the runway? I've heard tower asking for this when the runway it's wet.

Boeing747 万岁!

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