We need a little help. First some background.We have a little contract with Dryden Flight Research Center to build a Range Safety analysis tool called JARSS that extends their tool set to handle (among other things)

After further random trys, we were able to add a directional gyro and it works. That let us point the plane more or less south and pass within a few miles of Edwards. But we didn't know that until we plotted the dumped log file using MatLab.I have been unable to find Windows binarys for the Atlas add on.We have not been able to work out adding a GPS to the X-15. Yes, that's cheating but the real X-15 pilots had a ground controller telling them where they were based on radar track.

You will get more help from the developers' mailing list than here.You can subscribe to the developers' mailing list by going to: http://www.flightgear.org/mail

>We need a little help. First some background.>>We have a little contract with Dryden Flight Research Center>to build a Range Safety analysis tool called JARSS that>extends their tool set to handle (among other things)

Thanks for the quick reply. I was a little reluctant to jump into the developer's mix, because I am not at all ready to start taking Flight Gear apart, and maybe never will be. We just wanted to use it as a tool. It works well in that role because the log file is so easy to import into the analysis program. I will, however, be glad to complain, I mean, submit suggestions for improvements.After repeated runs yesterday afternoon I was able to get a ground track that flies right by Edwards. Our plan today is to try repeating the same flight and move the drop point until we manage to land on the lakebed. In other words we are going to cheat.I think what we are doing would have killed a real X-15. During reentry, pitch control is not recovered until about 30kft. I was able to pull out before hitting the ground by really hauling back on the stick, but I had to pull -8 gees to do it. The limit was 7.33 g. I'm also doing about 5.7 Mach at 20 km and I bet that would have exceeded the allowed heat load.I'm sorry I don't have any information on how the thrusters worked.Appendix C of the Hypersonic book has many citations of NASA papers from the late 1950's including several on the analog and digital computers used in the X-15 simulator. I doubt if those papers are on the internet but can probably be purchased in hardcopy. I'll look around a bit as I have time.Yes, I'll switch this over to the developers list.