PW4000 vs GE90
E.A. Singh
Can anybody enlighten me on the type of control mechanisms used on the PW4000
and whether it is completely computer controlled? Is it controlled by a FADEC
system? What about the reliability of this Engine? Any pilots flying this and
can compare say against the GE90 ?
--eddy
TriStar500
A recent Wall Street Journal article on the GE90 noted that the shutdown
rate of the PW4000 was 7 times higher then that of the CF6.
I personally wouldn't put any PW engine design that's newer than a JT8D on
my airplane.
Simon Craig
As far as I know, the 4000 is indeed controlled by a FADEC system, though
I have no idea about any reliability reports.
Simon.
Steve Lacker
>A recent Wall Street Journal article on the GE90 noted that the shutdown
>rate of the PW4000 was 7 times higher then that of the CF6.
And for years, Southwest Airlines had to report that the dispatch reliability
of its CFM-56 powered 737's was lower than its (aging) 727-200's, the JT9 had
problems when new, the CF-6 is less reliable than the JT8D, etc. etc. Seems to
me that the "old" engine (regardless of maker) in a comparison such as the
above *usually* has the lower shutdown rate or higher dispatch reliability.
>I personally wouldn't put any PW engine design that's newer than a JT8D on
>my airplane.
I've never heard a foul word uttered about the PW 2000 series.
--
Steve Lacker / Applied Research Laboratories, The University of Texas
512-835-3286 / PO Box 8029, Austin TX 78713-8029
sla...@arlut.utexas.edu
George Mantis
: >What about the reliability of this Engine?
: A recent Wall Street Journal article on the GE90 noted that the shutdown
: rate of the PW4000 was 7 times higher then that of the CF6.
: I personally wouldn't put any PW engine design that's newer than a JT8D on
: my airplane.
You should realize, the CF6 is a much older series than the PW4000, so CFM
International has had a LOT more time to "iron out the kinks" than Pratt &
Whitney. Besides: the GE90 is NOT part of the CF6 series!
The GE90 is an all-new engine; the PW4084 is a derivative posessing all of the
proven technologies of its predecessors. Therefore, P&W engines on your 777
would be a wise investment. (Case in point: look at all the "adjustments" GE
had to make to its GE90 following thenukerouse difficulties they experienced
during the 777 flight test program.)
Finally: the PW2000 series are at least as reliable as any of the old JT8D's.
Check your facts on the B-757 and C17 (which uses the military version of the
PW2037).
No offense, but I hope you're not involved in technical purchasing for any
airlines.
--George C. Mantis
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