[Flightgear-devel] Yasim and taileron; JSBsim and thrust-reverser
Hi, maybe this fit more to the flightmodel-list, but I'm not sure about if this list is really be read;-) Trying to do a fdm with yasim for a Panavia Tornado GR4 IDS I noticed that it seems to me not possible to model a taileron (elevator and aileron in one control surface at the tail)- I always get the error message: Insufficient elevator to trim for approach I tried this also on the Lightning-yasim but the same error... It is really not possible? On JSBsim I noticed that the thrust reverser are not working ( as an example Fokker 70/100), but I remember that it was working with 0.9.9 and 0.9.10 - something changed or I'm too stupid? thanks Regards HHS __ Ihr erstes Baby? Holen Sie sich Tipps von anderen Eltern. www.yahoo.de/clever - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Yasim and taileron; JSBsim and thrust-reverser
Thanks, Markus Zojier hepled me too. We have to much aircrafts, I was completely lost- so I couldn't see, that tere are some with tailerons! O.k. So I should solve my problem! Regards HHS --- LeeE [EMAIL PROTECTED] schrieb: On Sunday 02 December 2007 14:48, Heiko Schulz wrote: Hi, maybe this fit more to the flightmodel-list, but I'm not sure about if this list is really be read;-) Trying to do a fdm with yasim for a Panavia Tornado GR4 IDS I noticed that it seems to me not possible to model a taileron (elevator and aileron in one control surface at the tail)- I always get the error message: Insufficient elevator to trim for approach I tried this also on the Lightning-yasim but the same error... It is really not possible? On JSBsim I noticed that the thrust reverser are not working ( as an example Fokker 70/100), but I remember that it was working with 0.9.9 and 0.9.10 - something changed or I'm too stupid? thanks Regards HHS First of all, you _need_ to include an elevator-trim binding to the hstab for YASim to solve. Have a look at the BAC-TSR2 (combined elevator aileron), YF-23 (combined elevator rudder) or SU-37 (combined FCS pitch roll). The SU-37 has a lot of additional control inputs that might be confusing but the BAC-TSR2 and YF-23 are fairly simple. YASim assumes a fixed elevator and determining it's incidence is fundamental to the way it works but it is possible to make a passable job of simulating elevons. Basically, you'll need four control inputs for the hstab element:- elevator, elevator-trim, aileron and aileron trim (remember to set the aileron and aileron-trim to split=true) YASim will then simply sum the inputs. The only thing to watch out for is that it can then output deflections of up to +-2.0 instead of limiting it to +-1.0 (it would be handy if such a limiter could be implemented). Another tip, one Andy R gave me a long time ago but one I've only recently understood the significance of, is to set the idrag for the elevators to a low value. With fixed tailplanes the drag will increase with AoA but with all-moving 'slab' tailplanes this isn't the case, so setting a low idrag value should help simulate this. So far I've only tried low idrag in the SU-37 (and I've just added it to the BAC-TSR2 that I'm currently revising) but it seems to work ok. LeeE - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel Machen Sie Yahoo! zu Ihrer Startseite. Los geht's: http://de.yahoo.com/set - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Yasim and taileron; JSBsim and thrust-reverser
On Sunday 02 December 2007 14:48, Heiko Schulz wrote: Hi, maybe this fit more to the flightmodel-list, but I'm not sure about if this list is really be read;-) Trying to do a fdm with yasim for a Panavia Tornado GR4 IDS I noticed that it seems to me not possible to model a taileron (elevator and aileron in one control surface at the tail)- I always get the error message: Insufficient elevator to trim for approach I tried this also on the Lightning-yasim but the same error... It is really not possible? On JSBsim I noticed that the thrust reverser are not working ( as an example Fokker 70/100), but I remember that it was working with 0.9.9 and 0.9.10 - something changed or I'm too stupid? thanks Regards HHS First of all, you _need_ to include an elevator-trim binding to the hstab for YASim to solve. Have a look at the BAC-TSR2 (combined elevator aileron), YF-23 (combined elevator rudder) or SU-37 (combined FCS pitch roll). The SU-37 has a lot of additional control inputs that might be confusing but the BAC-TSR2 and YF-23 are fairly simple. YASim assumes a fixed elevator and determining it's incidence is fundamental to the way it works but it is possible to make a passable job of simulating elevons. Basically, you'll need four control inputs for the hstab element:- elevator, elevator-trim, aileron and aileron trim (remember to set the aileron and aileron-trim to split=true) YASim will then simply sum the inputs. The only thing to watch out for is that it can then output deflections of up to +-2.0 instead of limiting it to +-1.0 (it would be handy if such a limiter could be implemented). Another tip, one Andy R gave me a long time ago but one I've only recently understood the significance of, is to set the idrag for the elevators to a low value. With fixed tailplanes the drag will increase with AoA but with all-moving 'slab' tailplanes this isn't the case, so setting a low idrag value should help simulate this. So far I've only tried low idrag in the SU-37 (and I've just added it to the BAC-TSR2 that I'm currently revising) but it seems to work ok. LeeE - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Yasim and taileron; JSBsim and thrust-reverser
FlightGear CVS from 11/24/2007 win32-built plib --- Jon S. Berndt [EMAIL PROTECTED] schrieb: On JSBsim I noticed that the thrust reverser are not working ( as an example Fokker 70/100), but I remember that it was working with 0.9.9 and 0.9.10 - something changed or I'm too stupid? thanks Regards HHS I thought we fixed that. Maybe you have an old configuration or software? Jon - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel __ Ihr erstes Baby? Holen Sie sich Tipps von anderen Eltern. www.yahoo.de/clever - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Yasim and taileron; JSBsim and thrust-reverser
On JSBsim I noticed that the thrust reverser are not working ( as an example Fokker 70/100), but I remember that it was working with 0.9.9 and 0.9.10 - something changed or I'm too stupid? thanks Regards HHS I thought we fixed that. Maybe you have an old configuration or software? Jon - SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
