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Forum: Tech Log

15th Sep 2006, 13:18

Replies: 32

Question about GE CF6 and rated thrust

Views: 5,185

Posted By barit1

The "IF" is superfluous - I was in the business...

The "IF" is superfluous - I was in the business 33 years and NOT ONCE encountered SL ISA:

15.0 C
14.696 PSIA (1013.25 Mb, if you prefer)
ZERO humidity

:8

Forum: Tech Log

14th Sep 2006, 20:22

Replies: 32

Question about GE CF6 and rated thrust

Views: 5,185

Posted By barit1

Given that the fan airflow creates most of the...

Given that the fan airflow creates most of the thrust in a high-bypass machine like CF6, the rated thrust is a matter of pushing a specified airflow (about 1400 lbs/sec) through a...

Forum: Tech Log

14th Sep 2006, 00:27

Replies: 32

Question about GE CF6 and rated thrust

Views: 5,185

Posted By barit1

What about hot day performance? Note that at...

What about hot day performance?

Note that at SL 30C, zero bleed, the N1 reaches a peak of 114.6%, and this is the hottest TAT at which full rated thrust can be produced. Above this temp, N1 must...

Forum: Tech Log

14th Sep 2006, 00:00

Replies: 32

Question about GE CF6 and rated thrust

Views: 5,185

Posted By barit1

How do you go about running the mill at exactly...

How do you go about running the mill at exactly ISA? Totally impractical in the real world!

For performance acceptance testing, airlines have test cells from SL (AMS or FCO for example) to over...

Forum: Tech Log

13th Sep 2006, 12:19

Replies: 32

Question about GE CF6 and rated thrust

Views: 5,185

Posted By barit1

Depends on the temperature/pressure of the day....

Depends on the temperature/pressure of the day. Any N1-managed engine will have a power management curve in which you enter with ambient conditions and look up the proper N1 for that day. (different...

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