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A vs B econ speeds

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Old 5th November 2012 | 08:36
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From: Above the clouds where the sun is always shining
A vs B econ speeds

hello,
Does anyone has an idea if the econ speeds for a certain cost index are the same?
like 737 vs 320 at the same cost index, do they fly the same speed?
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Old 5th November 2012 | 10:03
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From: I wouldn't know.
No, they do not produce the same speed, it might be in the same ballpark though.

For example we use CI 10 on our 737s and CI 7 on our A320 family. Even on the airbus fleet it doesn't produce the same speed though, depending on FMCG manufacturer it will give a 250kts or 270 kts descent speed for example, while CI 10 on the boeing will produce a 250kts descent. Climb and cruise speeds are a completely different problem altogether.

I would suggest checking out Boeings and Airbus information on the subject.
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Old 5th November 2012 | 16:12
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From: engineer at large
I think the Boeing is stuck with 250kts (or 240kts) leftover from the checkride internal default.

Last edited by FlightPathOBN; 5th November 2012 at 16:12.
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Old 5th November 2012 | 20:41
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From: I wouldn't know.
That's just below 10000' or FL100. Above that the descent speed is a fix number depending on cost index.
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Old 5th November 2012 | 20:59
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From: Above the clouds where the sun is always shining
thank you Denti, that all i needed to know
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