Tan Flyr
Topic Author
Posts: 1609
Joined: Sat Aug 19, 2000 11:07 pm

MD-80 Take Off At 109 Degrees F

Sun Jul 19, 2009 12:43 am

My son was wondering, and thus myself, how much runway, on average, this afternoon at FAT where it is 109 degrees would a full MD80 to DFW need for take off?

FAT is 336 ft above sea level.

Thanks
 
ajd1992
Posts: 2390
Joined: Mon Jul 24, 2006 7:11 am

RE: MD-80 Take Off At 109 Degrees F

Sun Jul 19, 2009 1:47 pm

It would depend on weight and other weather conditions, so it's somewhat hard to say otherwise.
 
ElpinDAB
Posts: 442
Joined: Sun Apr 17, 2005 7:00 am

RE: MD-80 Take Off At 109 Degrees F

Sun Jul 19, 2009 8:25 pm

FAT's longest runway is 9200ft, so on a 109F day, it wouldn't be able to leave at max takeoff weight. That would require almost 10,000ft.
 
hodyoaten
Posts: 8
Joined: Sat Jul 04, 2009 1:37 am

RE: MD-80 Take Off At 109 Degrees F

Sun Jul 19, 2009 10:03 pm

I took a look at this link:
http://www.boeing.com/commercial/airports/acaps/md80sec3.pdf (PDF)

It shows that for the MD-88 at MTOW at near-sea level, runway requirement is 7700 ft, increasing to 8000 ft at ISA + 15 deg C. Not much of an increase, so I suppose at 109 degrees it would be 9000 ft or so. Of course this is just a guess as I don't have access to manuals; I'm not sure if those documents are authoritative. Looks like the real penalties kick in with higher elevations.
 
AAR90
Posts: 3140
Joined: Fri Jan 21, 2000 11:51 am

RE: MD-80 Take Off At 109 Degrees F

Mon Jul 20, 2009 10:29 pm

Not sure about runway required; however AA's Takeoff Planning System (at least the version available to pilots) converts everything to Gross Weights since that is the only real variable we can control. AA flight 420/20July FAT-DFW had a 155,200 lbs weight limit due to environmental conditions at FAT [primarily due to runway length/terrain & temp.]. Load Control placed max 140 pax limit and max 3,400lbs cargo limit upon that flight.
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