Re: [Flightgear-devel] Another person selling FlightGear on ebay
On 10/21/09, Jon S. Berndt jonsber...@comcast.net wrote: Maybe there ought to be a continuous listing on eBay for FlightGear that we put there, that mentions all the other rebrands, and prominently displays the web site, that it can be downloaded freely. The idea behind the listing wouldn't be to make money, just to set the facts straight. Or something like that ... Jon Excellent idea. Fabian -- Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Flightgear in industry use
Hi, Looking for information on autopilots I've found this: http://www.cloudcaptech.com/piccolo_II.shtm#software In the list of downloadable software you can see Flightgear listed, with credits. I've also found this: http://www.cloudcaptech.com/download/Piccolo/Piccolo%20Documentation/Version%202.1.1%20Docs/Software/Piccolo%20Simulator.pdf Those more active than me in FG development (almost everybody but me indeed...) could feel proud of their work by seeing FG recommended by industry leaders. Fabian -- Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Flightgear in industry use
On Wed, Oct 28, 2009 at 6:26 PM, Arnt Karlsen a...@c2i.net wrote: On Tue, 27 Oct 2009 08:50:14 -0500, Curtis wrote in message ef5fc9920910270650p21349d36x27b990b1a8ea3...@mail.gmail.com: On Tue, Oct 27, 2009 at 5:46 AM, Leonardo Fabian Grodek wrote: Hi, Looking for information on autopilots I've found this: http://www.cloudcaptech.com/piccolo_II.shtm#software In the list of downloadable software you can see Flightgear listed, with credits. I've also found this: http://www.cloudcaptech.com/download/Piccolo/Piccolo%20Documentation/Version%202.1.1%20Docs/Software/Piccolo%20Simulator.pdf Those more active than me in FG development (almost everybody but me indeed...) could feel proud of their work by seeing FG recommended by industry leaders. I got to see a Cloudcap Piccolo flying on big UAV earlier this fall (16' wing span, 150 lbs beast of an airplane). This was an older piccolo. I hear v2 is even better. Good stuff! (of course the uav stuff I'm working will be much better once it is finished.) :-) Curt. ..aye. One problem, they provide FG binaries, but no source??? http://www.cloudcaptech.com/download/Piccolo/FlightGear/ -- Well, under Piccolo Systems -- Downloads -- Piccolo Setup and User Guides, there's a link to this Piccolo Simulator document: http://www.cloudcaptech.com/download/Piccolo/Piccolo%20Documentation/Version%202.1.1%20Docs/Software/Piccolo%20Simulator.pdf In the Introduction of this document they mention the open source Flightgear simulator. Then, on page 40 they explain how to install Flightgear, and on page 42 they finally discover one of Flightgear's how-to pages. From here the user could get to all Flightgear information and sources. I agree they could have mentioned Flightgear's link for the sources in a more otstanding way; nevertheless, it seems they are not trying to hide the openeness of the simulator; they may have overseen something in the GPL rules, and by presenting to them this issue they would include a link to the Download Source Code page. Fabian -- Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Airliners and Auto Pitch-Trim
Hi, I have no experience in FGFS capabilities in terms of autopilot and trimming, but I do have some in JSBSim, so I will refer only to that FDM, and I hope this will be relevant to this discussion. First, I think it would be good to have this in mind: there are two types of trim: 1. Aircraft pitching moment trim, which refers to making the aircraft pitching moment zero, and 2. stick force trim, which, obviously, refers to zeroing the pilot stick forces. As Heiko has already pointed, airliners and most business jets use the stabilizer for pitching moment trim. In JSBSim this CAN be modeled as follows: channel name=Pitch : : summer name=Stabilizer Trim Sum inputfcs/pitch-trim-cmd-norm/input !-- Note that here is the trim variable that comes from the trimming algorithm -- clipto min-1/min max 1/max /clipto /summer : : This will yield a fcs/stabilizer-trim-sum that can be mapped into a fcs/stabilizer-pos-deg (using an aerosurface_scale) which can be then used to calculate the tail angle of attack (alpha+stab-downwash) and from there the tail lift and/or pitching moment (of course this aerodynamic data is not always easy to achieve). Regarding the second type of trim (stick force), as far as I know JSBSim does not have the capability for this yet, although it may be possible to build that on the base of existing trimming options). For manually operated elevators, the elevator angle for zero force will depend on hinge moments (affected by alpha_tail, dynamic pressure, etc.), and will normally will be different from 0 degrees. For powered elevators (as in modern or high performance aircraft) zero elevator deflection will give zero stick force (by means of an artificial feeling system). For how all said above can be applied in FGFS...well, somebody familiar with that part would need to jump in. I hope this was not more confusing than helpful... Fabian On Sun, Mar 7, 2010 at 7:29 AM, Innis Cunningham inn...@hotmail.com wrote: Hi Guys I think you will find on all Boeing aircraft if the elevator is out of neutral for a set amount of time the horizontal stabilizer runs to return the elevator to the null position.Hence retriming the aircraft.Hence the name stabilizer trim I think also you will find that the tab on the elevator is not a trim tab but moves in the opposite direction to the elevator movement. So until we get a working FDM for the horizontal stabilizer in FG anything else will be a hack. Cheers Innis Hi, I just tried with the SenceaII and both Ti and elevator filter influence this. Great, thanks to all for the help! Cheers Heiko If you have a pid-simple-controller, try increasing Ti, it slows down the action. Hi Torsten, That sounds like it could be done without nasal just in the autopilot file. I guess the speed of the trim-pitch-channel can be changed with the filter? (The 737-300 has a speed-trim at certain situations) Kind regards Heiko Hi Heiko, the auto-pitch-trim channel moves the elevator trim to return the elevator into the neutral position while the pitch-channel moves the elevator to change attitude. Or a bit more technical: The auto-pitch-trim-channel compares the elevator-pos-norm to a reference of zero and adjusts elevator-trim The pitch-channel compares e.g. current pitch with a reference of some calculated target pitch and adjusts elevator-pos Usually the pitch-trim channel is much slower than the elevator channel. HTH, Torsten -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel __ Do You Yahoo!? Sie sind Spam leid? Yahoo! Mail verfügt über einen herausragenden Schutz gegen Massenmails. http://mail.yahoo.com -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net
[Flightgear-devel] Operating System
Hi, I'm planning to buy a new PC with operating system. Is there any OS that is not supported by FlightGear? I want to be sure I'll be able to compile and run FlightGear. Is Windows 7 64-bit supported? Or should I better stay with Windows 7 32-bit. Please Linux people don't laugh at me :( Thank you! Fabian -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Optimal desktop processor/graphic card
Hi, I'm planning to buy a new desktop PC and I want to be sure I will be able to run FG smoothly (I may also be doing some video editing, but that's for another forum). Which processor/graphic card will be the optimal combination, without braking my bank account? I was thinking on an Intel i5 (dual core or quad core?) Do I need the i7 series? For the graphics I'm thinking about the ATI Radeon HD 5670 or 5770; the 5770 is $100 more expensive, do I really need it? Are cheaper cards enough? Thank you. Fabián -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] NASA 3D Models
What a coincidence! I discovered those models just yesterday! I managed to open the Shuttle model in Blender, so I guess it would be possible to have them exported to Flightgear. BTW, here's the link to the site: http://www.nasa.gov/multimedia/3d_resources/models.html Regards, Fabián On Sun, Sep 12, 2010 at 9:34 AM, Jon S. Berndt jonsber...@comcast.netwrote: Can these be converted to the format that FlightGear uses - particularly the crawler, the VAB, and the launch complex - as well as the launch vehicle models? Jon -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Improving the elevator modeling
On Wed, Mar 30, 2011 at 11:05 AM, cas...@mminternet.com wrote: Hi, ... The only parts lacking in the JSBSim as best as I can determine are some numbers to define the elevator aero coefficents, hinge moments as a function of tail alpha and deflection, and changes in the aspect ratio of the wing as a function of flap deflections that will be used to calculate the downwash for a specific wing configuration and flight condition Any comments?? John John, You might try posting this on the JSBSim developer list. I know that Agostino De Marco has done some modeling of hinge moments using JSBSim. I seem to recall that he wrote an AIAA paper that included hinge moment modeling, etc. Downwash can probably be calculated as a function (perhaps as a function of lift force generated), and a local alpha for the elevator can be calculated that accounts for the downwash angle. Jon I can do that ;-) Does Agostino follow/post to the JSBSim list? Would like to exchange ideas with him. Any particular reason why his work has not migrated into the JSBSim code? John The elevator hinge moment (say, elev_hinge) can be modeled with the JSBSim functions in the config file (or better in a separate system file. Then a new trim mode should be coded, which would trim not only the aircraft but also the elevator hinge moment (using the defined elev_hinge parameter). I don't see right now any other way to do this, but I hope there is an easier one. Agostino's work could bring some light. Fabián -- Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Calculating free stick position and forces
On Fri, Apr 1, 2011 at 12:38 AM, Jon S. Berndt jonsber...@comcast.netwrote: Actually, Alan is correct, as Ron also mentioned in the JSBSim-devel list, where this topic is cross-posted. I think it is quite possible that we can already do this using function definitions in the aerodynamics section of an aircraft spec. file. There is no perceptible performance hit to using function definitions. The functions are implemented in C++, are fairly efficient, and calculations are cached per-frame. I'd prefer not to see possibly type-specific hard-coded calculations going into the codebase - I think we can implement this in the current codebase using existing capabilities. Jon I agree, there are already enough tools in the config file for defining the stick force. But how can we trim the stick force? Would it be possible to use the autopilot functions? or a new trim mode is needed in the code? Fabián -- Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
