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Re: [Jsbsim-devel] Thermal street lift
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From: Dave C. <dav...@co...> - 2020-04-15 18:52:07
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In JSBSim::FGWinds the total air movement is calculated thus: vTotalWindNED = vWindNED + vGustNED + vCosineGust + vTurbulenceNED; This allows wind and turbulence to be calculated independently. However, one can still overwrite these using the property system. If you try to set the updraft and it returns to zero that means some process is overwriting the value. That process needs to be found and disabled (or at least modified to work together with your updraft setting). -- Dave On 4/15/20 11:27 AM, Simon Julie Morley via Jsbsim-devel wrote: > Can you have one without the other ? > > I'm after uplift if that's the correct term. > > And no flight gear is not involved in this... Does that matter ? > > Simon > > On Wed, 15 Apr 2020, 18:32 Dave Culp, <dav...@co... > <mailto:dav...@co...>> wrote: > > Now I'm confused. Do you want uplift or turbulence? Both? Is > FlightGear involved in any way here? > > > Dave > > > On 4/15/20 4:14 AM, Simon Julie Morley via Jsbsim-devel wrote: >> Guys we're still trying to implement this into Outerra and we're >> having no luck getting any turbulent effects.... >> >> Any ideas ? >> >> Simon >> >> On Mon, 13 Apr 2020, 13:30 Simon Julie Morley, >> <sim...@go... >> <mailto:sim...@go...>> wrote: >> >> Ah I think this is another one of those issues that FG throws >> into JSBsim... >> >> Even if I turn turbulence to none the wind-down-fps property >> is still being updated to near enough zero by what looks to >> be FG ridge lift code. >> >> I wonder if I can turn FG ridge lift off.. >> >> On Mon, 13 Apr 2020, 12:53 Sean McLeod, <se...@se... >> <mailto:se...@se...>> wrote: >> >> Hi >> >> Okay so in the video you enable turbulence, which is >> going to add some semi-random values to the wind vector. >> >> So can you confirm that if you don’t enable turbulence, >> but rather simply set atmosphere/wind-down-fps that you >> don’t see the expected result? >> >> Cheers >> >> *From:* Simon Julie Morley via Jsbsim-devel >> <jsb...@li... >> <mailto:jsb...@li...>> >> *Sent:* Monday, April 13, 2020 1:01 PM >> *To:* Development issues >> <Jsb...@li... >> <mailto:Jsb...@li...>> >> *Cc:* Simon Julie Morley <sim...@go... >> <mailto:sim...@go...>> >> *Subject:* Re: [Jsbsim-devel] Thermal street lift >> >> Hopefully this video my explain better >> >> https://photos.app.goo.gl/GqTXFuZ6NZsJ4zRD7 >> >> Regards >> >> Simon >> >> On Mon, 13 Apr 2020, 11:35 Sean McLeod, >> <se...@se... <mailto:se...@se...>> wrote: >> >> Hi Simon >> >> Shouldn’t be according to the comments in the source >> code. Maybe there is some other code you have that is >> resetting the wind? >> >> // User-specified steady, constant, wind properties >> (local navigational/geographic frame: N-E-D) >> >> PropertyManager->Tie("atmosphere/psiw-rad", this, >> &FGWinds::GetWindPsi, &FGWinds::SetWindPsi); >> >> PropertyManager->Tie("atmosphere/wind-north-fps", >> this, eNorth, (PMF)&FGWinds::GetWindNED, >> >> (PMFd)&FGWinds::SetWindNED); >> >> PropertyManager->Tie("atmosphere/wind-east-fps", >> this, eEast, (PMF)&FGWinds::GetWindNED, >> >> (PMFd)&FGWinds::SetWindNED); >> >> PropertyManager->Tie("atmosphere/wind-down-fps", >> this, eDown, (PMF)&FGWinds::GetWindNED, >> >> (PMFd)&FGWinds::SetWindNED); >> >> PropertyManager->Tie("atmosphere/wind-mag-fps", this, >> &FGWinds::GetWindspeed, >> >> &FGWinds::SetWindspeed); >> >> Cheers >> >> *From:* Simon Julie Morley via Jsbsim-devel >> <jsb...@li... >> <mailto:jsb...@li...>> >> *Sent:* Monday, April 13, 2020 11:57 AM >> *To:* Development issues >> <Jsb...@li... >> <mailto:Jsb...@li...>> >> *Cc:* Simon Julie Morley >> <sim...@go... >> <mailto:sim...@go...>> >> *Subject:* Re: [Jsbsim-devel] Thermal street lift >> >> Problem is that seems to be a JSBsim calculated >> value..... So you can't change this property, as it's >> gone as quick as you set it. >> >> On Mon, 13 Apr 2020, 06:45 Dave Culp, >> <dav...@co... <mailto:dav...@co...>> wrote: >> >> atmosphere/wind-down-fps >> >> I believe an updraft would be a negative value. >> >> -- Dave >> >> On 4/12/20 10:28 PM, Simon Julie Morley via >> Jsbsim-devel wrote: >> >> Hi guys, >> >> I believe what I'm looking to adjust is >> within the atmosphere properties but I don't >> know which one I'd adjust to generate a >> constant thermal lift of say 3ft sec >> >> Any help would be appreciated >> >> Regards >> >> Simon. >> >> _______________________________________________ >> >> Jsbsim-devel mailing list >> >> Jsb...@li... <mailto:Jsb...@li...> >> >> https://lists.sourceforge.net/lists/listinfo/jsbsim-devel >> >> _______________________________________________ >> >> The JSBSim Flight Dynamics Model project >> >> http://www.JSBSim.org >> >> _______________________________________________ >> >> >> >> _______________________________________________ >> Jsbsim-devel mailing list >> Jsb...@li... >> <mailto:Jsb...@li...> >> https://lists.sourceforge.net/lists/listinfo/jsbsim-devel >> _______________________________________________ >> The JSBSim Flight Dynamics Model project >> http://www.JSBSim.org >> _______________________________________________ >> >> _______________________________________________ >> Jsbsim-devel mailing list >> Jsb...@li... >> <mailto:Jsb...@li...> >> https://lists.sourceforge.net/lists/listinfo/jsbsim-devel >> _______________________________________________ >> The JSBSim Flight Dynamics Model project >> http://www.JSBSim.org >> _______________________________________________ >> >> >> >> _______________________________________________ >> Jsbsim-devel mailing list >> Jsb...@li... <mailto:Jsb...@li...> >> https://lists.sourceforge.net/lists/listinfo/jsbsim-devel >> _______________________________________________ >> The JSBSim Flight Dynamics Model project >> http://www.JSBSim.org >> _______________________________________________ >> > _______________________________________________ > Jsbsim-devel mailing list > Jsb...@li... > <mailto:Jsb...@li...> > https://lists.sourceforge.net/lists/listinfo/jsbsim-devel > _______________________________________________ > The JSBSim Flight Dynamics Model project > http://www.JSBSim.org > _______________________________________________ > > > > _______________________________________________ > Jsbsim-devel mailing list > Jsb...@li... > https://lists.sourceforge.net/lists/listinfo/jsbsim-devel > _______________________________________________ > The JSBSim Flight Dynamics Model project > http://www.JSBSim.org > _______________________________________________ > |
