> I don't think that's the primary issue ... although there > might be a /secondary/ issue with the kap140 being more > vulnerable to bad handling characteristics than some other > autopilots are; I don't know. I recommend fixing the > flight dynamics first, and only then looking to see what > secondary issues might exist. > > Other oddity in the flight dynamics is: much too much > rolling moment due to changes in engine power setting. > I would have tried to fix this, but I didn't see any > parameter to control this in the configuration file. > I know there is some irreducible rotational drag from > the propeller, and this rightly belongs in the engine/prop > configuration ... but there are other things such as > asymmetric wing-root incidence that are used to counteract > it ... I didn't do an exhaustive search, but I didn't see > that anywhere. > > There are many other oddities, such as fuel never being > consumed from fuel tanks, effective mixture not being > sensitive to altitude, EGT reading high and insensitive > to mixture, etc. etc.
This would be interesting - I've not yet seen fuel not being consumed. Which aircraft? I wonder which version of JSBSim you are using in FlightGear? As for engine characteristics being off, unfortunately our piston model author has been very busy (even unresponsive). If I have to fix that, it's going to take some extra time, which I have very little of. If someone else wants to take a look at that, it would be really great. I'd help out as much as I could. I've been wondering if it would be a good idea to turn off some of the dynamic aero derivatives and see what happens to the performance and handling. It could also be that the DATCOM file used to create the Seneca II derivatives needs to be tweaked a little bit. If we can determine some real values for some of the derivatives, the DATCOM file can be "seeded" with those to help produce better results. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
