[Flightgear-devel] Horton Ho IX
Hi Emmanuel, I have done some work with 7-8' wing span RC flying wings, so this Horton model is very interesting to me! Thanks for making it and adding it to CVS, it looks very nice! I don't know how the full scale aircraft flies, but if it flies anything like my RC wings, it will be very sensitive in pitch (maybe more than it is now, but that also would depend a bit on control rigging), roll will be slow, and it should glide forever power off ... like a slope soarer. The real thing might have more drag than mine, especially with the gear down, but I would expect a very long shallow glide slope with this. Also I would expect a lot of adverse yaw and basic lack of yaw stability ... it will eventually stabilize out in heading, but it would probably wander around a bit in yaw and small roll changes would probably induce some yaw changes that take a while to settle out. But that's based on my smaller models ... there may be things they did with the control rigging to minimize these tendencies. With my models we don't have separate elevator and ailerons ... so you can't do offset aileron throws to compensate for adverse yaw ... because any unequal throw in the ailerons translates to a pitch change ... basically the elevator position is the average of the two surfaces and aileron position is the difference between the two surface positions. Anyway, very neat stuff, I really love how you and others take so much time to accurately model all these wonderful historical aircraft! Another interesting thing I'd love to see modeled is the Arup flying wing. Just a couple weeks ago I got a chance to speak to one of the test pilots (now in his 70's) and he was telling us stories about how well it flew and how nice and forgiving it was. He did a drag race with the Arup (46hp motor) against a new corvette with a couple hundred horse power once down the length of the runway. He fired up the engine and was quickly airborne and flew the length of the runway in ground effect. When he crossed over the end, he looked back to see where the big powerful corvette was and it was only about 1/3 of the way down the (grass) runway fish tailing all over the place. He won an easy $5 that day. I also have access to a bunch of video of test flights of the Arup ... I'm hoping to be able to get a copy in a couple weeks. Best regards, Curt. -- Curtis Olson: http://baron.flightgear.org/~curt/ -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] best way to remotely control flight gear?
* Eli Jordan -- Tuesday 14 July 2009: as far as I could see the route manager only allows for pre set waypoints, such as airports, i was hoping to be able to input co-ordinates (latitude and longitude) and have the auto pilot fly between these. In telnet just type set /autopilot/route-manager/input -123.456,37.89 to append this waypoint to the list at runtime. That's lon,lat. (Maybe we should swap those?) You can also demand a particular altitude: set /autopilot/route-manager/input -123.456,37...@8000 Possible formats are: (airport|fix|nav|lon,lat)[...@alt] -- e.g. k...@900 There are commands available for clearing the list, removing entries, etc. @clear ... clear route @pop ... remove first entry @delete3 ... delete 4th entry @insert2:k...@900 ... insert k...@900 as 3rd entry k...@900 ... append k...@900 For example set /autopilot/route-manager/input @clear This works also from the property browser, or via Nasal etc. The route manager dialog uses the same interface. Of course, you have to use an autopilot which takes the waypoints from the route manager if you want your aircraft flown through all the points. The default AP does this. m. -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Horton Ho IX
On Wednesday 15 Jul 2009, Curtis Olson wrote: Hi Emmanuel, I have done some work with 7-8' wing span RC flying wings, so this Horton model is very interesting to me! Thanks for making it and adding it to CVS, it looks very nice! I don't know how the full scale aircraft flies, but if it flies anything like my RC wings, it will be very sensitive in pitch (maybe more than it is now, but that also would depend a bit on control rigging), roll will be slow, and it should glide forever power off ... like a slope soarer. The real thing might have more drag than mine, especially with the gear down, but I would expect a very long shallow glide slope with this. Also I would expect a lot of adverse yaw and basic lack of yaw stability ... it will eventually stabilize out in heading, but it would probably wander around a bit in yaw and small roll changes would probably induce some yaw changes that take a while to settle out. But that's based on my smaller models ... there may be things they did with the control rigging to minimize these tendencies. With my models we don't have separate elevator and ailerons ... so you can't do offset aileron throws to compensate for adverse yaw ... because any unequal throw in the ailerons translates to a pitch change ... basically the elevator position is the average of the two surfaces and aileron position is the difference between the two surface positions. Anyway, very neat stuff, I really love how you and others take so much time to accurately model all these wonderful historical aircraft! Another interesting thing I'd love to see modeled is the Arup flying wing. Just a couple weeks ago I got a chance to speak to one of the test pilots (now in his 70's) and he was telling us stories about how well it flew and how nice and forgiving it was. He did a drag race with the Arup (46hp motor) against a new corvette with a couple hundred horse power once down the length of the runway. He fired up the engine and was quickly airborne and flew the length of the runway in ground effect. When he crossed over the end, he looked back to see where the big powerful corvette was and it was only about 1/3 of the way down the (grass) runway fish tailing all over the place. He won an easy $5 that day. I also have access to a bunch of video of test flights of the Arup ... I'm hoping to be able to get a copy in a couple weeks. Best regards, Curt. The X/YB-35/49s certainly suffered from yaw instability problems; in one YB-49 bomb run test it took the pilot four minutes to stabilise the aircraft, during which time the bombardier became airsick. This compares pretty badly with the B-29, which only took a max of 45 seconds to stabilise. The YB-49s weren't fitted with autopilots though, which would have helped. The B-2, of course, is fitted with a modern FBW FCS, which controls the split aileron airbrakes to keep the yaw under control. Incidentally, Edwards AFB is named after one of the YB-49 test pilots who died in a YB-49 crash. The Arup design was resurrected in the Vought V-173 'Flying Pancake' Sadly, I couldn't find any real Horten Ho IX footage on youtube but there's a clip of the Ho 2 glider at: http://www.youtube.com/watch?v=GjXr5w3M4mc There's some footage too, of the Arup at: http://www.youtube.com/watch?v=Nxz1UF67EQI You can see the V-173 at: http://www.youtube.com/watch?v=LfpTDOAfj7Y and also worth looking at, in the context of the Horten and other flying wings, is the Armstrong Whitworth AW-52: http://www.youtube.com/watch?v=7H1tyMRtcho LeeE -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] [Flightgear-cvslogs] CVS: data/Models/Airport BAK-12-0.ac, NONE,
Vivian Meazza wrote: Update of /var/cvs/FlightGear-0.9/data/Models/Airport In directory baron.flightgear.org:/tmp/cvs-serv26998 Added Files: BAK-12-0.ac BAK12.xml Log Message: Add runway arrester gear type BAK-12. Based on Dave Culp's original work Just as a reminder, as written in the 00README.CONTRIBUTE file: The following classes of static geometries and therefore the corresponding subdirectories are being maintained via the FlightGear Scenery Model Repository (http://scenemodels.flightgear.org/models.php): Agriculture/ Aircraft/ Airport/ [...] Thus, whenever you put a model into one of these directories, you're putting it at risk of getting overwritten without notice if you don't submit to the Scenemodels repository. Cheers, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -- -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] heads up - effects
I've checked in the initial work on my effects framework. This allows one specify OpenGL attributes, including shaders, in .eff files. For the moment these are only associated with terrain materials. The default effect for terrain has a shader that does per-pixel lighting, with a fallback to the traditional pipeline if a system doesn't support shaders. This effect is in Effects/terrain-default.eff. Also, you can disable the use of shader effects with the property /sim/rendering/shader-effects. In the coming weeks there will be more documentation and examples, as well as effects for models, of course. Let me know if anything breaks, Tim -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] [Flightgear-cvslogs] CVS: data/Models/Airport BAK-12-0.ac, NONE,
Martin Spott wrote: Vivian Meazza wrote: Update of /var/cvs/FlightGear-0.9/data/Models/Airport In directory baron.flightgear.org:/tmp/cvs-serv26998 Added Files: BAK-12-0.ac BAK12.xml Log Message: Add runway arrester gear type BAK-12. Based on Dave Culp's original work Just as a reminder, as written in the 00README.CONTRIBUTE file: It's already there :-) Jon -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] [Flightgear-cvslogs] CVS:data/Models/Airport BAK-12-0.ac, NONE,
Martin Spott Vivian Meazza wrote: Update of /var/cvs/FlightGear-0.9/data/Models/Airport In directory baron.flightgear.org:/tmp/cvs-serv26998 Added Files: BAK-12-0.ac BAK12.xml Log Message: Add runway arrester gear type BAK-12. Based on Dave Culp's original work Just as a reminder, as written in the 00README.CONTRIBUTE file: The following classes of static geometries and therefore the corresponding subdirectories are being maintained via the FlightGear Scenery Model Repository (http://scenemodels.flightgear.org/models.php): Agriculture/ Aircraft/ Airport/ [...] Thus, whenever you put a model into one of these directories, you're putting it at risk of getting overwritten without notice if you don't submit to the Scenemodels repository. Thanks Martin - I think Jon Stockill has that in hand. Vivian -- Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
