Re: [Jsbsim-devel] Thermal street lift

[Simon J. M. <sim...@go...>]

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...> 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...> 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...> 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...>
>>> *Sent:* Monday, April 13, 2020 1:01 PM
>>> *To:* Development issues <Jsb...@li...>
>>> *Cc:* Simon Julie Morley <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...> 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...>
>>> *Sent:* Monday, April 13, 2020 11:57 AM
>>> *To:* Development issues <Jsb...@li...>
>>> *Cc:* Simon Julie Morley <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...> 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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>
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