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PEG is based off of an old algorithm from the 60s designed for real rockets. As such, it has some odd cases where if the performance of the vehicle is too great, such that the mass doesn't drop quickly enough, the algorithm diverges and the vehicle does exactly what you say. Is the problem in...

A few suggestions: 1. Get an account with space-track.org . This is the official outlet for the US Space Surveilance system, so you can get all orbital elements for all unclassified satellites for all time, including Vanguard I all the way back to 1958. It's pretty good with bulk downloads and...

You have to be careful with launch windows, and the simple Hohman 180deg transfer is rarely best in real life. Things like the orbit eccentricity of Mars and the orbit inclination of Venus screw up our nice circular coplanar assumptions. If you look at the porkchop plot to one of those planets...

OK, I think I found a couple of uninitialized variables that might be causing the problem. I've uploaded a new version, along with the changes tblaxland suggested. And, that'll learn me to make stupid mistakes like that. My addon was number 1 with a bullet for this week, 370 downloads, and when...

Hielor: I think I compiled it in release, that's what the project is set for now. Zeehond: Both parachutes works for me, but you can't see the drogue from the cockpit. You can still tell its active, because the whole vehicle swings tail first, and the terminal velocity is about 100m/s (200m/s...

Good catch! I used Visual Studio C++ 2008 express. Does anyone know how to compile such that it doesn't have this dependency?

Hmm, that's weird. I tested this on a fresh Orbiter install before I uploaded it. Check what files you have in your Modules directory. There should be an AresIXFS.dll and AresIXUSS.dll. Also check for any zero-length files in the config, config/vessels, textures/AresIX, and meshes/AresIX. When...

Quick-n-Dirty Ares-IX posted at orbithangar Ares I-X. Urwumpe's will be better, but this is for those of you that want to fly along with the flight if/when it goes tomorrow.

Quick-n-Dirty Ares I-X. Urwumpe is making a better one, but this one is there for simulating it before the actual flight. Make sure you activate the PitchProgram2 module before you launch, then follow the included instructions. Autopilot is by included MFD, sequencing of jettion and parachute...

New and Improved Glideslope(TM)! Now reads your config files and identifies all the runways in the world. PB and NB buttons still page through runways (not bases, sorry, next release) but instead of just SLF and Vandenberg it is every runway. It loads up one surface base per second when starting...

Meters per second is a much better idea of rocket effectiveness. It's just how fast you throw exhaust out the back. Much more intuitive than how long you can burn a pound of fuel to get a pound of thrust. This is one of those conventions that just infuriates me, along with electrons having...

I'm working on updating my Glideslope http://orbithangar.com/searchid.php?ID=2763 addon to among other things be able to read custom entry profiles (so you don't have to enter an XR5 on a Space Shuttle entry profile) and read the config files so that it finds all the runways in the world, not...

Magnetic compass, mostly to demonstrate the WMM-2005 World Magnetic Model, but useful if you want to go find the north magnetic pole or something.

GlaDOS totally makes the game. "If at first you don't succeed, you fail." "Do not touch the operational end of the Device. Do not look into the operational end of the Device. Do not immerse the Device in liquid, even partially. Most important, don't ever, ever, ever.....{garbled}" "Failure...

Orbiter uses the VSOP87 ephemeris from the french Bureau des Longitudes. It is a curve fit through the best available (at the time) integrated ephemeris, DE200 from JPL. DE200 in turn was constructed by fitting a best initial condition state vector for all of the planets which are then...

I've only done 432 tons (full load of XR parts, no extra fuel) but I am taking them all the way to the moon. The thing takes for EVER to get into orbit, and when I'm there, I have about 1.5km/s delta v left. So, what do I do? Dump the cargo overboard, of course. I boosted the cargo using 1km/s...

Are you sure that you have your touchdown points in the right order? Check the docs, but it needs to be something like nose wheel, left wheel, right wheel. If you go nose wheel, right wheel, left wheel, then I think that the spacecraft will flip over when it gets unstuck from the ground and the...

Try converting individual SLDPRT files one at a time rather than the whole assembly. This might make a simpler 3DS, which might import better into Anim8or, where you could glue them back together.

This is just a request for comment, and specifically neither a promise to perform any particular action nor a requirement that others do so. It is especially not a flame targeted at anyone. I was reading an interesting page http://www.joelonsoftware.com/uibook/fog0000000249.html talking about...

This isn't a complete solution, but export from SolidWorks to the StereoLithography (StL) format. This one is a text-based list of vertices, edges, and faces that other programs would at least have a prayer of importing. You can probably wash that through one or more other converters (maybe...