a320fan
Topic Author
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E-Jet Operational Temperature

Sat Feb 09, 2013 2:13 pm

I have heard a rumor that E-Jets can only operate in temperatures below 35 degrees C. Is this true? If so what do operators do if the temp is above 35. I know that Virgin Australia flies E-jet aircraft into MQL and AYQ where temperature's are very often above this "limit" as well as the large capital city airports of SYD , BNE, MEL, PER and other's during summer months exceeding this often. Surely an airline wouldn't put up with an aircraft that cannot fly in commonly crossed conditions in there operation. I don't believe this rumor and I cannot remember where I heard it from. I thought I would put it out to the A.net experts for clarification.
Airliners flowen in: 737-700, 737-800, A320, A321, 777-300ER, 777-200ER, 777-300, 787-8, A330-200, Q300
 
ThePinnacleKid
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RE: E-Jet Operational Temperature

Sat Feb 09, 2013 2:42 pm

I imagine that it is (like a lot of airliners)..

ISA + 35.

The ERJ-145 series is limited at that, can't imagine the 170/190's being other than that.
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a320fan
Topic Author
Posts: 392
Joined: Fri May 01, 2009 5:04 am

RE: E-Jet Operational Temperature

Sat Feb 09, 2013 2:55 pm

Quoting ThePinnacleKid (Reply 1):

I imagine that it is (like a lot of airliners)..

ISA + 35.

Ah, That makes a lot more sense, Thankyou.
Airliners flowen in: 737-700, 737-800, A320, A321, 777-300ER, 777-200ER, 777-300, 787-8, A330-200, Q300
 
pilotpip
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RE: E-Jet Operational Temperature

Sat Feb 09, 2013 4:13 pm

Quoting ThePinnacleKid (Reply 1):
The ERJ-145 series is limited at that, can't imagine the 170/190's being other than that.

Same for the 170.
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loggat
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RE: E-Jet Operational Temperature

Sat Feb 16, 2013 2:48 pm

The 170 can T/O and Land in heat up to ISA+35C. Pressure altitudes -1000ft to +8000ft (E190 can go to +10000ft). T/O and Land cold limit is -40C. In flight cold limit is -54C up to 25000ft, and then linearly to -62C at 36000ft, holding at -62C all the way up to 41,000ft.
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AF1624
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RE: E-Jet Operational Temperature

Sun Feb 17, 2013 12:09 pm

On a more general note, what elements of the aircraft will fail if these temperatures are exceeded?

I would guess the engines, being that they have temperatures in the 3-5 hundreds of degrees C, would not be affected by such "small" variations of temperature (well, apart of course from thrust being affected)? So what else?
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loggat
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RE: E-Jet Operational Temperature

Sun Feb 17, 2013 4:58 pm

Well, as for my airline, in the US we generally will use Jet A fuel which has a gelling point of around -40C, so I'm guessing that our -40C T/O/LDG cold limit is a precaution to prevent fuel feed problems during critical phases of flight. In Canada, we usually get Jet A1 which has a gelling point of around -50C. As for the other limits, there are better experts than me on this board.
There are 3 types of people in this world, those that can count, and those that can't.
 
Fabo
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RE: E-Jet Operational Temperature

Mon Feb 18, 2013 2:38 pm

Quoting AF1624 (Reply 5):
On a more general note, what elements of the aircraft will fail if these temperatures are exceeded?

I would guess the engines, being that they have temperatures in the 3-5 hundreds of degrees C, would not be affected by such "small" variations of temperature (well, apart of course from thrust being affected)? So what else?

I would say it is not a question of "something will fail" but rather "it is not worth bothering to certify".
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Viscount724
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RE: E-Jet Operational Temperature

Tue Feb 19, 2013 1:57 am

Quoting loggat (Reply 4):
The 170 can T/O and Land in heat up to ISA+35C. Pressure altitudes -1000ft to +8000ft (E190 can go to +10000ft). T/O and Land cold limit is -40C. In flight cold limit is -54C up to 25000ft, and then linearly to -62C at 36000ft, holding at -62C all the way up to 41,000ft.

AC had to cancel some flights operated by Jazz CRJ-200s in 2008 when temperatures at Yellowknife (YZF) in Canada's Northwest Territories dropped below -40C for several days (not unusual). Carriers using 737s kept operating normally.
http://www.cbc.ca/news/canada/north/story/2008/01/29/cold-jazz.html
 
loggat
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RE: E-Jet Operational Temperature

Tue Feb 19, 2013 5:12 am

We've had planes stranded in YEG for a couple of days due to the -40C. Luckily, I wasn't on the stranded crew either time.
There are 3 types of people in this world, those that can count, and those that can't.

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