This is an interesting problem. I've noted it. I may file a bug report at the JSBSim using the Bug tracker there. It seems like a possible JSBSim bug, no?
Jon > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Dene > Maxwell > Sent: Saturday, November 12, 2005 8:29 PM > To: [email protected] > Subject: [Flightgear-users] Aircraft crashes unexpectedly...too hard or > notinterested > > > Haven't received a response..... too hard or not interested? > Dene > > > Last month I posted this and got alot of comments back. > > I've experimented and have some extra information which may shed some light > on the problem; > > I undertook this trip in the 172P Skyhawk (1981 model), 2D panel, a mammoth > trip. I encountered the same sort of behaviour at varying intervals (about 2 > hours) into the flight but because of either; better recovery charateristics > or lower ground speed the autopilot was able to recover and continue. This > enabled me to switch windows to the FGFS MSDOS window which I was unable to > do once the aircraft had hit the ground with in either of the two previous > aircraft tried. The FGFS window had these error messages. > > These occurred over a period of about 4-5 hours until I quit the flight due > to running out of fuel!!!! > > Failed to untie property propulsion/c-thrust[0] > Failed to untie property propulsion/engine[0]/reverser-angle > Failed to untie property propulsion/c-thrust[0] > Failed to untie property propulsion/engine[0]/reverser-angle > > Failed to untie property propulsion/c-thrust[0] > Failed to untie property propulsion/engine[0]/reverser-angle > Failed to untie property propulsion/c-thrust[0] > Failed to untie property propulsion/engine[0]/reverser-angle > > Does this help explain the problem? > > Dene > > On Sun, 2005-10-16 at 22:15 +1300, Dene Maxwell wrote: > > Just an observation that may be of interest; > > > > I can fly approx 1500Nm over water at 300kts and not have a problem... > > reasonable graphics and even land successfully (any landing you can > > walk away from is a good landing!!!). > > > > I can't fly approx 400Nm at 300kts over land without the aircraft > > crashing about 300Nm into the flight. > > > > Some background > > NZWN (Wellington International,NZ) to YSSY (Sydney-Kingsford-Smith, > > Australia) 1484NM in a A10 Thunderbolt at 300kts cruise... flight goes > > great. > > > > YSSY (Sydney- Kingsford-Smith, Australia to YBBN (Brisbane > > International, Australia) 410NM in either an A10 Thunderbolt at > > 300kts or Cessna 310 twin prop at 180kts crashes at about the 300NM > > mark. > > > > Interestingly I can fly the A10 from YSSY out to sea, then due north > > to parallel to YBBN then line up for a landing no problems, total trip > > is about 500NM. > > > > The problem seems to be triggered by flying over land for a prolonged > > period. In all cases the majority of the flight is undertaken under > > AutoPilot control at variably 5,000 to 10,000 ft ASL. > > > > I have tried reducing the screen resolution from 1280x1024 to 800x600 > > but it makes no difference. > > > > The platform is a 1.8Ghz P4, Windows Me, 256M RAM, nVidia GeForce2 > > MX/MX400 video card (32Mbyte). > > > > Any comments would be gratefully received. > > > > Dene, > > You didn't say which version of FlightGear you are using. > > Using Flightgear CVS, I flew from NZWN to YSSY as you suggested and > apart from noting a missing tile (known bug usually due to an airport > lying across a tile boundary) I didn't have any problems. > > YSSY to YBBN: > I started flown this route and 300nm out from YBBN , I'm still flying. > 300nm from YSSY, still here... Preparing to land at YBBN... Not the best > landing but still down in one piece. > > A couple of possibilities > The mostly likely cause is that you have found a bug in 0.9.8. > FlightGear 0.9.8 has a few major bugs here and there. Solution: You can > either upgrade to CVS (a tricky task under windows which involved > installing cygwin) or wait for version 0.9.9. > > The other (albeit unlikely) possible is that it is something in your > hardware or software set up. > > Could someone with similar hardware and OS comment on this cross country > flight? My hardware doesn't match what Dene is using. (I am still > thinking that the problem was to do with a 0.9.8 bug) > > George Patterson > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.1.362 / Virus Database: 267.13.0/167 - Release Date: 11/11/05 > > > > _______________________________________________ > Flightgear-users mailing list > [email protected] > http://mail.flightgear.org/mailman/listinfo/flightgear-users > 2f585eeea02e2c79d7b1d8c4963bae2d _______________________________________________ Flightgear-users mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-users 2f585eeea02e2c79d7b1d8c4963bae2d
