ISA +35 in DEN

[Knob]

Thats our limitation on the EMB and with all the hot wx up there last week we were forced to stop flying when temps go 40*C and up. What are the limitations on the CRJs?

 

[COOPERVANE]

+40.....

 

[Flying Illini]

+40.....

For what CRJ?

CRJ-100/200 is ISA+35*C. Minimum is -40*C

 

[jetracer5]

+40.....

Ummm....ISA +35 for the CRJ-200

 

[ex j-41]

Dispatch says +40, so it must be OK.

 

[Flying Illini]

Dispatch says +40, so it must be OK.

lol!

.

 

[WMUSIGPI]

CRJ 200 and 900 are both ISA +35 on the high end and an actual of -40 on the low end

 

[COOPERVANE]

CRJ 200 and 900 are both ISA +35 on the high end and an actual of -40 on the low end

WHOOPS...Brain cramp!......I was thinking of the -40

 

[blesko]

Dispatch says +40, so it must be OK.

Ignore the thunderstorms and disapating tornadoes, we've got guys flying right through it....... It's all good mon

 

[Mr. Johnson]

Dispatch says +40, so it must be OK.

Don't confuse +40C reported in a METAR with ISA+35C, apples and oranges.

 

[resetjet]

I've only been close to ISA+35 once, Wichita last year. OAT was 124F

 

[pipers]

only time I've had ISA+35 was in LAS....sat it out for a few hours.

 

[CMRJetDriver]

ISA is 15 degrees at sea level and decreases 2 degrees every 1000 feet. Denver is 5431 feet above sea level. The easy way is to set the altimeter to 29.92 and read what it says. If it's 5431 then use 5500. At 5500 feet ISA is 4 degrees. (15 - 11 = 4). Your temperature limit for take off would be 39 degrees. ISA + 35. (4 + 35 = 39).

 

[Mr. Johnson]

Don't matter where you are...ISA+35 is too dang hot to sit in an airplane!

 

[Stifler's Mom]

Isn't ISA +35 the max to fly with a deferred pack or inop APU?

 

[asayankee]

Isn't ISA +35 the max to fly with a deferred pack or inop APU?

Nope...For most operators >30C without APU or deferred pack is "not normally dispatched". ISA +35C is an actual aircraft limitation for T/O.

 

[Abernathy]

Isn't ISA +35 the max to fly with a deferred pack or inop APU?

That's what NOT to say when you blow that question on an oral

 

[goahead]

Isn't ISA +35 the max to fly with a deferred pack or inop APU?

Yea that's it man you got it!!!!

 

[trip]

Can anyone explain why it is ISA+35? it seems pretty standard among manufactures. If I recall in the EMB120 it was the EFIS tubes as the non-EFIS models had a higher max temp?

 

[AntiJedi]

If I recall in the EMB120 it was the EFIS tubes as the non-EFIS models had a higher max temp?

EFIS, ISA+35. Non-EFIS, +38. It has to do with the cooling of the tubes.