Tripleseven From United States of America, joined Jul 2000, 118 posts, RR: 0 Posted (12 years 8 months 2 weeks 3 days 16 hours ago) and read 2464 times:
I'm taking the PHX this weekend, and it occurs to me that mid-day flights are taking off in temps as high as 110 F+. Is there a point that it's just too hot to fly, thus effectively shutting the airport down?
I thought I remembered hearing there was a point that the onboard computer couldn't calculate take-off thrust at a certain temp.
PPGMD From United States of America, joined Sep 2001, 2453 posts, RR: 0
Reply 1, posted (12 years 8 months 2 weeks 3 days 16 hours ago) and read 2450 times:
It isn't so much the heat put the density altiitude as most airports that I know of. I remember just last weekend the local elevation is 25ft, but the denisty alititude was 1,700ft, doesn't make that much of a diffrence here but in some of the areas that are higher up that can make a huge diffrence.
OPNLguy From , joined Dec 1969, posts, RR:
Reply 3, posted (12 years 8 months 2 weeks 3 days 16 hours ago) and read 2447 times:
The item you're referring to is MOT, or maximum operating temperature....
It varies with aircraft type.... On the 737-200 with JT8D-9, PHX is 122F. Newer 737 variants run up to 126F.
LAS went through a real hot spell back in 1979, or 1980, and may well have hit MOT there (may be different values than PHX). I know PHX busted it it 6-7 years ago, and some Pratt-powered aircraft diverted to cooler climes (relatively speaking.)
IMissPiedmont From United States of America, joined May 2001, 6372 posts, RR: 32
Reply 4, posted (12 years 8 months 2 weeks 3 days 15 hours ago) and read 2434 times:
PHX shut down in 1997 one day when the temperature hit 122. TUS was only 117 so remained operational. Of course TUS has a longer runway. Still pretty interesting to see a DC-9-80 using 10000 feet to get into the air.
PHX temperatures "as high as 110"? That's cute. That is a fairly normal temperature in PHX for the next 3 months.
Jetguy From , joined Dec 1969, posts, RR:
Reply 5, posted (12 years 8 months 2 weeks 3 days 13 hours ago) and read 2412 times:
Back when the LAS airport shut down because of the temperature, I can remember listening to the radio on the way home from the airport - the DJ was giving the weather forecast and said that the temperature at McCarren International was 119 degrees and the wind was out of the south at 5 mph so the windchill factor was 115F. (Maybe you had to have been there, but I thought it was pretty funny at the time.)
TT737FO From United States of America, joined Jun 2001, 472 posts, RR: 8
Reply 6, posted (12 years 8 months 2 weeks 3 days 12 hours ago) and read 2401 times:
I concur, I seem to recall that for the -200 the temp limit is in the neighborhood of 120.
Hottest I have ever seen was El Centro in August '90--124F. We did not fly that day for several reasons. F18 Canopy, once closed would have cooked us. The tarmac was even hotter, and we didn't want to risk needless heat cases with our ground crews.
It was hotter that day in El Centro than any day I remember in the Gulf War.
Sccutler From United States of America, joined Jan 2000, 5695 posts, RR: 27
Reply 7, posted (12 years 8 months 2 weeks 3 days 12 hours ago) and read 2402 times:
I recall the day in June, 1990 when my wife and I were moving from LA (Fullerton, actually) back home to Dallas, driving two cars; it was 122 or 123 in PHX as we drove through, and for a time, many flights were ancelled or delayed; at the time, my understanding was that the big problem was not that the aircraft were unable to fly and fly safely, but rather, that the POH (Pillot's Operating Handbook) for the various aircraft did not contain data for the higher temps and, therefore, the flights could not be operated within compliance with the book. It was also reported that Boeing, McD and others were faxing amendments to the POH's to the various airlines so the books could be officially updated, and the flights could legally operate.
It was HOT!
But my 1976 ElDorado, with a radiator as big as a bed, ran just fine, and the AC kept me quite comfy.
...three miles from BRONS, clear for the ILS one five approach...
ThirtyEcho From United States of America, joined Dec 2001, 1679 posts, RR: 1
Reply 9, posted (12 years 8 months 2 weeks 2 days 19 hours ago) and read 2319 times:
Bear in mind that these temps are OAT on the runway and not some reading made at the local TV station. I was aboard a WN 737 at Dallas Love a few years ago and the OAT on the taxiway was at Death Valley levels: 127F. We returned to the apron to offload fuel and then took off. The density altitude must have been tremendous.
B747skipper From , joined Dec 1969, posts, RR:
Reply 13, posted (12 years 8 months 1 week 3 days 17 hours ago) and read 2090 times:
Yes there are other limits for airplanes... runway limit is one, climb limit is the other... reduce the takeoff weight to be able a certain climb gradient...
The airplanes produced by Boeing are generally limited to temperatures of +50 C to -56 C for takeoff at sea level elevations...