Jim Wilson wrote:
> Andy that works.  Haven't been able to download your tar ball (is the
> link correct?).

Sigh.  Long story: plausible.org is a box in my closet.  We lost power
last night.  It has a dumb (Asus P5A) ATX motherboard that doesn't
know how to power on following a power loss (it comes up in soft-off
mode instead).  The file system had errors.  I didn't have time to
wait for the fsck this morning, so I went to work with it still down.
I'll go home at lunch and get this fixed.  My fianc�e is complaining
that the wedding site is down too. :)

> It appears that the thrust/altitude curve is a bit too steep. [...]
> Also there seems to be a greatly exagerated "ram effect" (not sure of
> correct term).  It seems that airspeed changes might be affecting the
> thrust value too greatly, but I don't have a feel for this at all.

OK, this doesn't surprise me too much.  I haven't examined the Jet
stuff very closely.  The way the code works is that it matches some
performance curves I got out of McFarland for a 707 engine.  The
turbofans on the 747 actually won't be too terribly far off in their
thrust performance, I'd think. (With a little scaling of the minor
output numbers like N1 and TIT to ones appropriate for the engine.)
Most likely, I've got an interpolation bug in there somewhere.  I'll
take a look.

Andy

-- 
Andrew J. Ross                NextBus Information Systems
Senior Software Engineer      Emeryville, CA
[EMAIL PROTECTED]              http://www.nextbus.com
"Men go crazy in conflagrations.  They only get better one by one."
 - Sting (misquoted)


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