[Flightgear-devel] Engine Problems
David, Once again, Im having some issues with my engine model. When I Browse Internal Properties I notice that the rpm gauge is registering 200k. OUCH! I also note that the starter, and engine are checked as not running. Is there something obviously wrong in one of my files? I believe you have them from a while back, but if you need me to send them again, I will Thanks Sonny ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
[Flightgear-devel] Inserting Disturbances
How do I insert a disturbance through a command line call. I'd like to test my adaptive autopilot, and its robustness, by inserting some wind/disturbance at a specified time. Should this be done through the command line? thanks ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Inserting Disturbances
how about through a command line? ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Turn Coordination
does anyone know of the equations that are used to determine how coordinated a turn is? I notice in the hud view mode there is a coordinated turn gauge, and in the distant modes, there is also a coordinated turn indicator. thanks ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Modifying Existing FDM
To Whom it May Concern, and to Whomever may be of assistance, I'm working on modifying a jsbsim FDM to represent an RPV with an autonomous autopilot. The autopilot andgnc systems are designed in Simulink, and we're using flight gear as the visual and dynamics model for the aircraft. I'm having a hard time maintaining an altitude hold, and I believe it is due to my lack of knowledge in terms of incorporating an engine and propeller model. I'm using an existing engine, and prop model, butour specific aircraft is equipped with an electric motor, and I don'tsee any examples of these in Flight Gear. The GNC system seems to be responding correctly, as is the velocity hold portion of the autopilot, but I'm not getting any response from the aircraft with an increase in thrust or power. Any advice on how to modify the engine or prop file for an electric motor would be greatly appreciated. thanks for the time sonny ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Modifying Existing FDM
Actually Jon, I haven't hacked together an electric motor. Sorry my post implied that. I was hoping someone could help me get started with that. The Config file that I've been modifying is one of a glider. ASK21, so there is no powerplant, but many of the geometrical characteristics are the same, and I just went through and changed out some of the SC Derivatives. Thanks in advance for any help sonny ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Modifying Existing FDM
In the prop file "prop_75in2f.xml" what is the input column for the Look up tables of C_THRUST, and C_POWER. The first column that is thanks ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Modifying Existing FDM
So if I know the range of velocity in which our plane will be flying, and the specs on the electric motor (600 speed motor), along with the Diameter of the single blade prop (11"), than I could calculate the advance ratio along eachvarying flight conditon. Is that Correct? The next thing would be to somehow correlate this to the actual output from the motor (Column 2) sonny ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Modifying Existing FDM
thanks for the tips. So you're suggesting that I leave the J (advance ratio), and coefficients alone, and just modify the Ixx and Diameter parameters accordingly? DONE! Well, this kind of leads me back to the original problem. My plane is supposed to be flying to a set of waypoints, lat, long, and altitude, and along this flight, should be tracking a.)velocity and b)altitude. It fly's to the specified lat, and long, but there is no response from the aircraft when the actual alt. drops below the setpoint altitude. I can see the thrust increase, and with this increase I expect an increase in lift, but I continues to ever so slowly loose altitude.It never shows an increase, and hence never tracks the setpoint. Now, this could be afunction of my SC derivatives, so maybe I'll go and revisit them. Earlier, you mentioned controlling theOUTPUT portion of the FDM.Why is it that the aircraft reacts differently when different options are enabled? With the right subset enabled, it fly's pretty well, but without, it's a disaster thanks ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] CG Location
I thought I read somewhere, that in Flight Gear, the CG of your aircraft isn't specific to the aircraft itself, but rather related to some sort of reference. Is this true? Or did I misinterpret something? It also mentioned that you could put the coordinates of (0,0,0) for CG location. sonny ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
[Flightgear-devel] Modifying Existing FDM
Some good thoughts again. Actually, I'm using a JSBSim flight model, within flightgear, but interfacing it to my own autopilot inside of Simulink. I might however switch over to the Flight Gear Autopilot, and see what kind of handling I get. Which address should I send the file to? sonny ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
