Re: [Flightgear-devel] Sun Light placement
Hi All, Thanks for the astronomy lesson. I will try to not ask any more silly questions. Durk's explanation illustrated the point so well that even I could understand it. :0) Mind you, the information you have all given me means any Country Music or Cowboy films, which refer to the Sun setting in the West, will have to be seasonably adjusted in future. Coming back to my item 1 though: http://i.imgur.com/N9wDU.png As shown in this picture, I am facing 350ยบ (almost due North), at 0915 hrs, but the light source is coming from the left (West). Now let's see if this one can be explained by my ignorance. Cheers, Vic-- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Hi res textures
On Thu, 2011-08-18 at 21:57 -0700, John Wojnaroski wrote: How does one specify use of high res textures? Or is this an auto-select feature during startup based on driver and graphic card features High resolution textures take precedence over low resolution textures when available. The usual procedure to only use low resolution textures was to rename Textures.high Erik -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
BTW, feature freeze is meant to be exactly this: No addition of new features. There's no point in delaying feature freeze specifically for aircraft as the feature set of the core, which aircraft are supposed to run on top of, is already supposed to be stable by definition of the feature freeze. Doesn't make sense to me (I have no clue what you mean). Theoretical situation: Somebody commits a major change of JSBSim one day before feature freeze. Shouldn't be a problem as such, because just before feature freeze the repository is open. Next day, feature freeze is in place, but it turns out several JSBSim aircraft don't run. Shouldn't be a problem, because you can still commit fixes. But: developer X has been working on his JSBSim aircraft and wants to commit it (for the first time) just in time one day before feature freeze - however discovers on that day that his aircraft doesn't run fly more (see above). That is a problem, because he either commits a broken aircraft in the hope to be able to fix it later, or he misses the deadline. Aircraft (and partially Nasal) are things dependent on the core - so naturally they can only be designed with respect to a given core state - and that means that conceptually the core has to be fix before the dependent stuff is fixed. At least that's how it makes sense to me... Cheers, * Thorsten -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
thorsten.i.r...@jyu.fi wrote: BTW, feature freeze is meant to be exactly this: No addition of new features. There's no point in delaying feature freeze specifically for aircraft as the feature set of the core, which aircraft are supposed to run on top of, is already supposed to be stable by definition of the feature freeze. Doesn't make sense to me (I have no clue what you mean). No problem, that's something I'll be able to cope with, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -- -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
Doesn't make sense to me (I have no clue what you mean). No problem, that's something I'll be able to cope with, And aren't we charming today? Well, since I know first hand about the joy of nightly diaper changes, I'll just add my best wishes for a more relaxing time here. Cheers, * Thorsten -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
thorsten.i.r...@jyu.fi wrote: Doesn't make sense to me (I have no clue what you mean). No problem, that's something I'll be able to cope with, And aren't we charming today? Well, since I know first hand about the joy of nightly diaper changes, I'll just add my best wishes for a more relaxing time here. False allegations from your end, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -- -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
Doesn't make sense to me (I have no clue what you mean). No problem, that's something I'll be able to cope with, And aren't we charming today? Well, since I know first hand about the joy of nightly diaper changes, I'll just add my best wishes for a more relaxing time here. False allegations from your end, You're right, admittedly, I was slightly exaggerating when I called you 'charming' :-) The best wishes are genuine though. * Thorsten -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
thorsten.i.r...@jyu.fi wrote: Doesn't make sense to me (I have no clue what you mean). No problem, that's something I'll be able to cope with, And aren't we charming today? Well, since I know first hand about the joy of nightly diaper changes, I'll just add my best wishes for a more relaxing time here. False allegations from your end, You're right, admittedly, I was slightly exaggerating when I called you 'charming' :-) The best wishes are genuine though. Thanks - well, to be honest, we're having a pretty relaxed time. Apparently you had been in much bigger trouble wrt. nightly diaper changes than we are now. Cheers, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -- -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Release Plan improvements, was: FlightGear v2.4 is Released!
Aircraft (and partially Nasal) are things dependent on the core - so naturally they can only be designed with respect to a given core state - and that means that conceptually the core has to be fix before the dependent stuff is fixed. FWIW, I added a section lessons learned to the http://wiki.flightgear.org/Release_plan I think the feature freeze for aircraft is something that should be improved. There seems to be no technical or logical reason why aircraft should not be modified up to short before the actual release. However, this is only true for aircraft not being part of the base distribution and when no commonly used files are changed (those outside FGDATA/Aircraft, FGDATA/Aircraft/Instruments-3d, FGDATA/Aircraft/Instruments etc). Torsten -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
Martin Spott: Thanks - well, to be honest, we're having a pretty relaxed time. Apparently you had been in much bigger trouble wrt. nightly diaper changes than we are now. Lucky you :) But don't feel to relaxed as I know pretty well this might change pretty quick :P Oliver -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
Please take your personal problems off this list. Gijs wrote: On the promotion side: did someone contact Avsim.com, flightsim.com etc. already? Done! Avsim and flightsim.com got an email. Will let you know when we show up there. Now, if everyone contacts local websites (Dutch, French, Japanese etc.) we will have a global promotion campaign! Cheers, Gijs -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
Done my share! :-) On 19 Aug 2011, at 14:24, Gijs de Rooy wrote: Please take your personal problems off this list. Gijs wrote: On the promotion side: did someone contact Avsim.com, flightsim.com etc. already? Done! Avsim and flightsim.com got an email. Will let you know when we show up there. Now, if everyone contacts local websites (Dutch, French, Japanese etc.) we will have a global promotion campaign! Cheers, Gijs -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
So far http://flightsim.com/ cooperated (thanks!), one more left! Durk, I know you did ;) From: durkt...@gmail.com Date: Fri, 19 Aug 2011 14:44:58 +0200 To: flightgear-devel@lists.sourceforge.net Subject: Re: [Flightgear-devel] FlightGear v2.4 is Released! Done my share! :-) On 19 Aug 2011, at 14:24, Gijs de Rooy wrote:Done! Avsim and flightsim.com got an email. Will let you know when we show up there. Now, if everyone contacts local websites (Dutch, French, Japanese etc.) we will have a global promotion campaign! Cheers, Gijs -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] YASIM Comment (was New aircraft: SF-25)
Hi Ron, 2011/8/16 Ron Jensen w...@jentronics.com: I took a look at the YASim solver today, first comparing the Inertial tensor with the inertias coming out of aeromatic. Not too far apart, but the 2 yasim aircraft I looked at were both 50% higher than the aeromatic numbers. Then I took a look at the -g switch and was rather shocked at the curves yasim generates. It generates CL, CD and L/D. My plot software computes force as (lift^2+drag^2)^0.5. Lift and drag are perpendicular by definition so this gives the total force in the lift/drag plane. I made 3 plots with Tat's A6M2 and Helijah's Katana and Gloster-Meteor models: http://www.jentronics.com/fgfs/temp/yasim/yasim-A6M2.png http://www.jentronics.com/fgfs/temp/yasim/yasim-katana.png http://www.jentronics.com/fgfs/temp/yasim/yasim-glostermeteor.png And then I loaded some data I had from a NACA 4 digit 0015 airfoil into the same plot definition: http://www.jentronics.com/fgfs/temp/yasim/naca0015.png I was pretty shocked to see the YASim charts drag numbers all seem to fall off at stall. This is counterintuitive to me, I expect drag to increase at stall, that is what keeps the speed low during the stall. Also, the lift/drag (L/D) ratio is actually the tangent of the angle the aerodynamic force is acting in. On the real airfoil it rapidly approaches 0 after the stall because the force is acting nearly parallel to the free stream velocity and drag dominates the ratio. This seems not to be the case with the YASim models. That is because you are comparing apples and oranges. What YASim outputs as a drag is actually the total drag including the induced drag. I guess that for the NACA 0015 you used the classical CD curve which is basically the friction drag only. Hence the differences. However YASim uses the well known formula CDi = k * CL^2 to assess the induced drag (line 224 of src/FDM/YASim/Surface.cpp). The problem is that this formula is obtained with Prandtl lifting line theory and is therefore only applicable in the linear domain (small AoAs) while YASim uses it for any AoA including those close to and beyond stall. The drop you see in the drag is the direct consequence of that : induced drag drops after the stall because the lift itself drops. Bertrand. -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] FlightGear v2.4 is Released!
Gijs de Rooy wrote: On the promotion side: [...] and now the always recurring question: Who owns the Freshmeat account !? ;-) Cheers, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -- -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
