On Sat, 2010-02-20 at 18:08 +0100, andrea...@gmx.net wrote: > >> just a "quick" fix like this can break an aircraft if it was > "tweaked" to fly correctly with this bug. > Okay... but if a model is tweaked this way, that would mean that the > tweaking only is active when the yoke is pulled back... so there > couldn't be a correct level-flight, which is a more important > situation, I guess. > > >> I tried a quick flight in the L-1049 after doing this change and > >> it would barely take off... > This is probably true for other aircraft (didn't test it), but I think > your experience here is a Lockheed1049-specific problem. The MAP is > only 48inHg at full throttle when it should be about 56 (the Gauges > don't even cover that value). > When you change "RatedBoost1" from 8 to 14, you get more realistic > indications and lift off 25% earlier. Also make sure to set propeller > pitch to max rpm. > I did some comparison and found that the original version reaches > take-off speed only 3 seconds earlier than the fixed version, even > with the yoke pulled back during acceleration. > > But I'd recommend Buckaroo's SuperConstellation anyway, I just took > this example because it is in CVS. > (BTW: the autopilot.xml is broken as well- lines 148 to 150 need to be > commented out.)
I was using Buckaroo's 1049H actually, along with an engine/prop combination I'm playing with for 2.x+ flightgear. I took off from a 4800 MSL field and was never able to exceed 6000 MSL. Before the fix the aircraft would easily reach 200 knots and climb at better than 800 fpm at 180 knots. After the fix I could barely maintain 150 knots in level flight. Because the formula for elevator drag includes dynamic pressure (aero/qbar-psf), and qbar is a function of the square of the airspeed, the effects of the change won't be as noticeable at lower speeds. > >> So each aircraft at a minimum needs a flight test and possibly some > tuning for the fix. > Sure! And of course I wasn't complaining - I thank you all very much > for your work! > If there is something I can do, tell me! I could do little test > reports for the fixed models. But who will do the bug fixes, the > author of the respective aircraft or some kind of CVS supervisor? It generally left up to the individual model author or if the model is maintained in the JSBSim cvs it will be synced from that database from time to time. Ron ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
