Re: [Flightgear-devel] Problem JSB FDM's
Jon Berndt wrote: I just built 0.9.3 and downloaded the 0.9.3 base package. The T-38 pulled left until I reset *both* the surface winds and the 500-foot winds to zero. Now it goes straight as an arrow. So, this says there is a problem with winds as added to JSBSim aero? If this is correct: Innis Cunningham wrote: The thing is that while trying to fix this problem I found that the F16 did not seem to be affected by the wind Then it's probably a aeromatic problem since the F-16 is created using NASA windtunnel data. This copes with what I wrote about JSBSim not turning when on the runway, that was with both fokker aircrafts. Erik ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
Re: [Flightgear-devel] Problem JSB FDM's
Jon Berndt wrote: Hi Folks After getting 9.3 going I find that the JSB A/C turn left off the runway going north and right going south is anyone else seeing this problem. It does not seem to effect the YASIM A/C. The 747 and F16(YASIM) take off straight and the T38 and 737 (JSBSIM)turn off the runway. YASim F-16??? I think this has been discussed in the Users mailing list - about 10/27, I think. You may be seeing an initialization problem. ?? Try centering all the aero surfaces immediately upon coming out of freeze. Also, maybe try an external view and see if the gear is turned. Also, try starting FlightGear with NO wind. I noticed that a ground turn in a JSBSim is next to impossible. The aircraft keeps going straight ahead, just as if there is no friction for tires moving sideways. I don't know if this is a recent problem, or this problem has been there for a while but I just recently noticed this. Erik ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
Re: [Flightgear-devel] Problem JSB FDM's
Erik Hofman The 747 and F16(YASIM) take off straight and the T38 and 737 (JSBSIM)turn off the runway. YASim F-16??? Sorry Erik dont know what I was looking at.Yes the F16 is JSB I noticed that a ground turn in a JSBSim is next to impossible. The aircraft keeps going straight ahead, just as if there is no friction for tires moving sideways. Are you saying that your JSB A/C are going straight on T/O. What A/C are you using. I don't know if this is a recent problem, or this problem has been there for a while but I just recently noticed this. I was not having this problem with 9.2 and as I dont continually update with cvs all I can say is it was not there in 9.2 but it is in 9.3 I will do some investigating tonight and see if I can come up with something.It just seems strange that no one else is see this problem. Either they are not flying the jets or they are only using yasim fdm's Erik Cheers Innis The Mad Aussi _ Hot chart ringtones and polyphonics. Go to http://ninemsn.com.au/mobilemania/default.asp ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
RE: [Flightgear-devel] Problem JSB FDM's
Jon Berndt writes I think this has been discussed in the Users mailing list - about 10/27, I think. Yes it was but the results were inconclusive . ?? Try centering all the aero surfaces immediately upon coming out of freeze They are centered.I have done nothing different to the A/C since 9.2 but now they wont go straight Also, maybe try an external view and see if the gear is turned. Also, try starting FlightGear with NO wind. Have done all this still the A/C goes right heading south and left heading north EG: at KSFO off 28L the A/c goes left and right off 10R If you were having this problem with the prop aircraft I'd say that you should expect the aircraft to fly that way, but this doesn't appear to be the case. I have not had time to update to the latest, yet. I guess I need to. I will have a play around with the yaw damper system as David Culp thinks the problem may be in there. Just how many of the real A/C have yaw damper.I is my understanding that it is only on sweept wing A/C to negate the onset of Dutch roll. Do A/C like the F16 and T38 have a yaw damper system. Jon Cheers Innis The Mad Aussi _ Hot chart ringtones and polyphonics. Go to http://ninemsn.com.au/mobilemania/default.asp ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
RE: [Flightgear-devel] Problem JSB FDM's
Do A/C like the F16 and T38 have a yaw damper system. The F-16 FCS has a LOT of things, including gun firing compensation! Jon ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
Re: [Flightgear-devel] Problem JSB FDM's
Innis Cunningham wrote: I noticed that a ground turn in a JSBSim is next to impossible. The aircraft keeps going straight ahead, just as if there is no friction for tires moving sideways. Are you saying that your JSB A/C are going straight on T/O. What A/C are you using. What I meant to say is that while taxiing the aircraft won't turn, in any direction. Erik ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
Re: [Flightgear-devel] Problem JSB FDM's
I just built 0.9.3 and downloaded the 0.9.3 base package. The T-38 pulled left until I reset *both* the surface winds and the 500-foot winds to zero. Now it goes straight as an arrow. Dave David Culp davidculp2[at]comcast.net ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
Re: [Flightgear-devel] Problem JSB FDM's
Ok David that seems to have fixed it for me to. The thing is that while trying to fix this problem I found that the F16 did not seem to be affected by the wind and I could get the 737 to t/o straight by changing the yaw beta but not the T38. Surely a 3 knot wind out of 270 would not cause that kind of swing taking off on 28L. While I have you does the (real)T38 have a yaw damper system. Cheers Innis The Mad Aussi David Culp writes I just built 0.9.3 and downloaded the 0.9.3 base package. The T-38 pulled left until I reset *both* the surface winds and the 500-foot winds to zero. Now it goes straight as an arrow. Dave _ Hot chart ringtones and polyphonics. Go to http://ninemsn.com.au/mobilemania/default.asp ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
RE: [Flightgear-devel] Problem JSB FDM's
I just built 0.9.3 and downloaded the 0.9.3 base package. The T-38 pulled left until I reset *both* the surface winds and the 500-foot winds to zero. Now it goes straight as an arrow. So, this says there is a problem with winds as added to JSBSim aero? Jon ___ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
