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Jon Berndt | 21 Oct 2004 13:20
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New JSBSim Newsletter Issue


 The Fall issue of the JSBSim newsletter, "Back of the Envelope" is online at the JSBSim
web site, www.jsbsim.org. Click on the newsletter link in the sidebar at left, or select
one of the newsletters at the top of the main page.

The Fall 2004 issue features contributions by Mathias Fröhlich, Bill Galbraith, and Roy
Vegard Ovesen, as well as myself, with articles:

- JSBSim Presented at the 2004 AIAA Modeling and Simulation Conference
- DATCOM+
- The PID Controller
- JSBSim Reference Frames

I hope you enjoy the newsletter, a mix of lightweight reading and overviews on various
technologies and items related to the use of JSBSim, a flight dynamics model that is used
by FlightGear.

As always, suggestions for future article topics, contributions of writing, corrections,
etc. are welcome.

Jon Berndt
--
Project Coordinator
JSBSim Flight Dynamics Model
http://www.jsbsim.org

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Jon Berndt | 25 Oct 2004 05:04
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C-172R

Well, like I mentioned in the JSBSim mailing list on Friday night, I managed to get pretty
good climb performance in the C-172R when running outside of FlightGear (JSBSim only in
test mode). The aircraft was at full gross weight and starting at sea level. In my JSBSim
standalone test I was able to climb to 8,000' easily in about 21 minutes (a little longer
than it should take, but not by much). When I run the same aircraft under flightgear I can
barely make 3,000 feet at all. Climb is very sluggish. I have done a check and the same
aircraft model files are being read in for both cases.

Can someone else out there try the C172R model that is now in JSBSim CVS, along with the
engine (engIO360C.xml) and the propeller (prop_Clark_y_7570.xml) that is referenced from
the main file - all in JSBSim CVS. See if you can climb to 8,000 feet, and then tell me
how long it took.

Jon

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