Re: [Jsbsim-devel] Thermal street lift

[Sean M. <se...@se...>]

Simon you mention:

no luck getting any turbulent effects....

But in your video when you switched on turbulence you did see turbulence effects. But it seemed you couldn’t see the effect of the wind updraft?

From a recent comment Bertrand made on a github issue - https://github.com/JSBSim-Team/jsbsim/issues/272

“Be aware that turbulence is supposed to be added to a global wind”

So, depending on the magnitude of the turbulence relative to your updraft it may be difficult to see both independently?

Cheers

From: Dave Culp <dav...@co...>
Sent: Wednesday, April 15, 2020 7:32 PM
To: Simon Julie Morley via Jsbsim-devel <jsb...@li...>
Subject: Re: [Jsbsim-devel] Thermal street lift


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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_______________________________________________
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

_______________________________________________