Question for 763 guys

[taseal]

during cruise (lets say 380) what kind of pitch up attitude do you have? oh and what do you guys fly at mach wise? .80ish?

thx!

[Doug Taylor]

A couple degrees up I think, I'll check this evening but I never really thought about it!

Depending on the cost index, it can vary anywhere from .76 to .81 in most circumstances.

[taseal]

thx doug! let me know

and I see about the speed... what is a common CI you put on those pond flights? 65?

what about domestic? do you remember what you did for the domestic? (cost index wise)

I'm messing with this sim now, so I want to know these little things lol

[moocowtex]

I think the cost index on the 300 is in the low 30's domestically. We so rarely see the 300 on the domestic legs nowadays that I don't really remember. On the 757, it's down to 21.

[DE727UPS]

Sometimes they Cost Index us at 555. That's the max. It's 84 plus at cruise. The 767 has a tendency to overspeed, as well, and you'll often get an overspeed warning if you don't back it off. I just speed intervene to Mach 83 and hope for the best. I'm in no big hurry.

[cime_sp]

Originally Posted by taseal

during cruise (lets say 380) what kind of pitch up attitude do you have? oh and what do you guys fly at mach wise? .80ish?

thx!

Not that you asked about it...but the CRJ 700 is usually about 2 degrees pitch up and we are flight planned at .80. Most folks just want to get where they're going though and will usually fly around at .83. It will sometimes do .84, but if the Fed's are asking we're only doing .83!!!

On LONG flights they might plan us at .77 though to save gas

[taildragger173]

Whats this whole cost index thing?

[DE727UPS]

It's the number you put into the FMC to tell it how fast you are gonna fly. That directly relates to how much fuel is burned. And that's why it's called "cost index". The flight planning data we get from dispatch is based on a certain cost index, so that's what we plug into the box.

[taseal]

Thx guys... I thought max ci was 0 which gives max cruise?

What bout pitch up att?

[taseal]

Originally Posted by taildragger173

Whats this whole cost index thing?

what de727 said. Its nased off crew cost and maintance costs i believe

[typhoonpilot]

Pitch is probably between 1.5 and 3.0 degrees ANU depending on weight. Doug, just look in the QRH for flight with unreliable airspeed. There should be pitch attitudes shown there.

Cost Index is a number derived from a formula. The formula is operating cost ( $/hour ) over fuel cost ( cents/pound ). Only those portions of operating cost affected by trip time should be included in the calcualtion ( i.e. cost of crew/hour, maintenance, etc. ).


Typhoonpilot

[taseal]

Originally Posted by typhoonpilot

Pitch is probably between 1.5 and 3.0 degrees ANU depending on weight. Doug, just look in the QRH for flight with unreliable airspeed. There should be pitch attitudes shown there.

Cost Index is a number derived from a formula. The formula is operating cost ( $/hour ) over fuel cost ( cents/pound ). Only those portions of operating cost affected by trip time should be included in the calcualtion ( i.e. cost of crew/hour, maintenance, etc. ).


Typhoonpilot

cool, thanks!

so 5 degrees up is too much eh?

lets say operating cost of 300 by fuel (6.48 a gallon, so lbs is .92 cents) comes way off though?

[typhoonpilot]

Originally Posted by taseal

cool, thanks!

so 5 degrees up is too much eh?

lets say operating cost of 300 by fuel (6.48 a gallon, so lbs is .92 cents) comes way off though?

Yes, 5 degrees sounds a little excessive.

I'm sure the airlines are paying way less than the commercial price of Jet A. I haven't heard a figure lately, but somewhere around $2 to 3/gallon at most. Operating cost would be in the thousands of dollars per hour for a 767-300.


TP

[B767Driver]

2 to 3 degrees at .78 Mach