Re: [Jsbsim-devel] Thermal street lift

[Dave C. <dav...@co...>]

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.
>
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