David Culp wrote:
is this something that you have/will implement in JSBSim for the
turbine model?
I'm not sure yet. Now that my internet connection is back up I'm trying to
find out what exactly is the problem that Hans-Georg is having. I need
specifics.
I have problems with the fuel consumption, not with thrust:
Davids last approach was:
correctedTSFC = TSFC * (1.5 - (N2norm * 0.58823));
The correctedTSFC will vary from
N2norm = 0 -> correctedTSFC=1.5 TFSC
to
N2norm = 0.85 -> correctedTSFC= TFSC
(This value should be the value at cruise speed,
which you will find in the docs)
to
N2norm = 1 -> correctedTSFC=0.91 TFSC
For the CFM56-5 TFSC at
http://www.caa.co.uk/srg/environmental/emissions/document.asp?groupid=704
and
at 'Klaus H�necke: Technic of modern airliners' I found
TSFC for cruise thrust = 0.611
but also
TSFC for static thrust = 0.35 ( with meets the ICAO values)
The TSFC-value of 0.35 seems to be a value in a test bed, but
should also be the value, when the aircraft does not move (airport).
And this value we will not get with the approach of David.
But I have no better idea :)
Hans-Georg
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