Manifold pressure & SimConnect not matching gauge

[pandadoudou]

Hi,

I'm building external gauges via SimConnect and have a problem with the data retrieved for the engine manifold pressure.

I'm using this SimConnect variable :

Code: Select all

ENG MANIFOLD PRESSURE:index

with index at 1
The output value does not match the manifold pressure gauge, it seems to have a rather large delta (~5 inHG)

I didn't found any specific LVar for this value in the manual.
Is there anything I missed here ?

I double checked, the unit is correct (inHG and not psi).

Thank you.

Boris

[Nick - A2A]

Hi Boris,

They're don't seem to be listed in the L:Var PDF which A2A published (which may be a simple oversight) but have you tried "L:Eng1_ManifoldPressure" and "L:Eng1_MPGauge"?

Cheers,
Nick

[pandadoudou]

Hi Boris,

They're don't seem to be listed in the L:Var PDF which A2A published (which may be a simple oversight) but have you tried "L:Eng1_ManifoldPressure" and "L:Eng1_MPGauge"?

Cheers,
Nick

Indeed, I was referring to this PDF when mentioning "the manual".

I didn't tried these LVars, nor I have tested LVars used on other aircrafts.

Thank you.

Boris

[Nick - A2A]

No problem - I think you'll find they do the trick. For what it's worth, there are many more Accu-Sim L:Vars than are described in the PDF. Lots of them aren't active in the Comanche, but this should be a pretty comprehensive list...

Core Accu-Sim L:Vars.txt

Cheers,
Nick

[Nick - A2A]

Just noticed there's another L:Var you may want to test: "Eng1_MPGaugeSmooth".

Nick

[pandadoudou]

No problem - I think you'll find they do the trick. For what it's worth, there are many more Accu-Sim L:Vars than are described in the PDF. Lots of them aren't active in the Comanche, but this should be a pretty comprehensive list...

Core Accu-Sim L:Vars.txt

Cheers,
Nick

Really nice, I'll take a look at this when I'll be home.

Beside that, I didn't used the non-Comanche LVars mainly because it didn't seems to me they were supported.

Thank you again.

Boris

[pandadoudou]

Just noticed there's another L:Var you may want to test: "Eng1_MPGaugeSmooth".

Nick

Not reading anything with this one

[Nick - A2A]

I checked when I compiled that text file Boris, and each of the specific L:Vars that I mention above returned the value that was shown on the MP gauge in the virtual cockpit (~14.5 inHg; I was idling on the ground at ~1000 RPM). Are you able to use one of them?

Cheers,
Nick

[pandadoudou]

I tried the following ones, with "inHG" as the unit :

L:Eng1_MPGaugeSmooth
L:Eng1_MPGaugeSmooth:1

Those ones doesn't read any value.
I haven't already used the LUA script listing all variables for the current aircraft. I might do this but I assume your text file came from the same process.

Boris

[Nick - A2A]

How about the two L:Vars I mentioned initially?

They're don't seem to be listed in the L:Var PDF which A2A published (which may be a simple oversight) but have you tried "L:Eng1_ManifoldPressure" and "L:Eng1_MPGauge"?

Cheers,
Nick

P.S. Yes - the .txt file I linked above was compiled using the FSUIPC "List Local Panel Vars" function.

[pandadoudou]

How about the two L:Vars I mentioned initially?

They're don't seem to be listed in the L:Var PDF which A2A published (which may be a simple oversight) but have you tried "L:Eng1_ManifoldPressure" and "L:Eng1_MPGauge"?

Cheers,
Nick

P.S. Yes - the .txt file I linked above was compiled using the FSUIPC "List Local Panel Vars" function.

I definitely tried more than the 2 previous one I mentioned but I have hard time recalling... I'll try again this evening for sure !

Boris

[shadyowl2]

Programed in lua they are fsx_variable_subscribe("ENG MANIFOLD PRESSURE:1", "inHg",
"L:Eng1_MPGauge", "Number", new_data_fsx
These will work.

How about the two L:Vars I mentioned initially?

They're don't seem to be listed in the L:Var PDF which A2A published (which may be a simple oversight) but have you tried "L:Eng1_ManifoldPressure" and "L:Eng1_MPGauge"?

Cheers,
Nick

P.S. Yes - the .txt file I linked above was compiled using the FSUIPC "List Local Panel Vars" function.

I definitely tried more than the 2 previous one I mentioned but I have hard time recalling... I'll try again this evening for sure !

Boris

[pandadoudou]

Programed in lua they are fsx_variable_subscribe("ENG MANIFOLD PRESSURE:1", "inHg",
"L:Eng1_MPGauge", "Number", new_data_fsx
These will work.

Thanks, I'll try this one.
I haven't already tried multiple variable subscription.

Will the "new_data_fsx" callback method be feeded with 2 parameters or only with 1 ?

[shadyowl2]

What is listed in your function it will call back those parameters. Let me know if I can be of any more help.