On Thu, 2011-02-10 at 18:46 -0700, Ron Jensen wrote: > Hey, I just reproduced the thing. Wind was 14 from 330 and I was on 08 so > there is a small tailwind. The c172p isn't set up to handle out-of-flight > envelope winds so it produces a large, erroneous pitching moment. I have an > idea for a solution. Will test and submit soon. > > Ron
Hi, Re: http://www.geoffair.net/tmp/tilted-001.png Thanks Ron. After few more tests, am now also sure it is the tailwind, thus can probably be duplicated anywhere, anytime, at least with the c172p. Will try some more, but this does answer why in say 1 specific machine/OS it would happen one day, and not the next ;=)) 1. It seems real weather fetch is _ALWAYS_ on, unless you specifically disable it. Can someone confirm this! And Martin, I was always specifically selecting YGIL:33, regardless of winds! And assumed the r/w selection was based on wind, but in the YGIL case, IRL the short 1000 ft 08/26 is NOT really used anymore, now they have tarred the new 4000 foot 15/33 runway, thus was miffed when fgfs put me on 08/26 ;=)) Fred, by the way, the weather fetch seems contrary to the 'default' sense in FGRUN command construction. The option :- [ ] Real weather fetch which adds --enable-real-weather-fetch, tends to suggest it is _OFF_ by default? Perhaps this should be reversed, to say - [ ] Disable real weather fetch so that it adds --disable-real-weather-fetch... at least while fgfs continues to DEFAULT to real weather fetching... if this is indeed the case. 2. Thanks Csaba. Yes I too later realized that I was 'using a stupid shell script wrapper' to pass in the arguments, and this was _NOT_ doing the right thing ;=(( OT: Must try to find the right way for this ;=)) since I do 'love' running fgfs using simple shell scripts... But to reproduce it easily, when sitting on say YGIL:33, I could go into the weather dialog, set it to manual, adjust the wind to say 22028KT and apply, and bingo, after 1-3 seconds, the Cessna tilted up like shown... And changing that back to say 33008KT, Apply, and after 3-10 seconds, the Cessna righted itself :=)) And this was even though I had returned my apt.dat.gz to the original... still pondering that change, but noted, sometimes the weather dialog show just NIL, on certain runs... maybe??? 3. But I think we can forget it being a nasal thing, for now... Alasdair, (AJ, Curt,), do not appreciate the hijacking of my thread. Start your own if you want to discuss, 'rant', on the use of nasal ;=)) its been done several, many?, times before... I like nasal, as an open, very powerful, plugin type technology... And Henri, the idea of generalizing what I now understand to be something to do with animations, also seems worth a NEW thread to discuss that... 4. So Ron, good luck on finding the problem when we have '... out-of-flight envelope winds so it produces a large, erroneous pitching...' And maybe this would go a long way to closing John's issue 250 ;=)) Anything I can do to help? Testing, etc... Many thanks to all those who help in this... It look like we may be on the flight to levelness ;=)) Regards, Geoff. ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
