This week I tweaked the autopilot of the MD11 a bit, and right now I have a reasonably well working autothrottle and altitude hold. I also modified the engine configuration file a bit by lowering the default TSFC and by-pass ratio values, based on information I found on the web.
So, this morning, I tried doing some range testing, and found that the MD11 prototype can now fly a distance of about 4500 miles. This may seem a bit short, but I discovered that the (aeromatic generated) JSBSim configuration file has four fuel tanks, but the engines draw fuel from only three tanks. Is there a way to fix this, so that the engines draw fuel from all four tanks? Also, I was wondering whether or not I can modify the TSCF and bypass ratio values in the JSBSim turbine engine files, without introducing any unwanted side effects. If I can get the sim to draw fuel from the fourth tank, we get a range of about 6000-6500 miles. Interestingly enough, that's pretty close to the published figure of about 6460 nautical miles that the original (non-improved) GE powered MD11's could do. :-) Cheers, Durk _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
