Not exactly a third party... need export engine rpm

[chromium]

Hi,

 

i'm looking for a way to export engine rpm and, maybe, engine power to an external text file that I already prepared.

 

What I exactly need is a function, a variable, something that I can read to print out :)

 

Anybody can help?

 

thanks!

[Crash_Horror]

Paste this into your "C:\Users\user\Saved Games\DCS\Scripts\Export.lua"

 

function LuaExportStart()
-- Works once just before mission start. --
default_output_file = io.open("YOUR_ENGINE_DATA_FILE.log", "w") -- writes a file to DCS root directory --
end
--------------------------------------------------------------
function LuaExportActivityNextEvent(t)
local tNext = t
local engine = LoGetEngineInfo()
default_output_file:write(string.format("t = %.2f RPM left = %f  RPM right = %f \n",t,engine.RPM.left,engine.RPM.right))
tNext = tNext + 1.0 -- data collected once every second / change this according to preference --
return tNext
end
--------------------------------------------------------------
function LuaExportStop()
-- Works once just after mission stop --
default_output_file:close()
end

 

It creates a "YOUR_ENGINE_DATA_FILE.log" file in the DCS root folder containing data like this:

t = 0.00 RPM left = 67.500000  RPM right = 67.500000 
t = 1.00 RPM left = 67.500000  RPM right = 67.500000 
t = 2.00 RPM left = 67.500000  RPM right = 67.500000 
t = 3.00 RPM left = 67.705765  RPM right = 67.705765 
t = 4.00 RPM left = 76.481903  RPM right = 76.481903 
t = 5.00 RPM left = 92.065933  RPM right = 92.065933 
t = 6.00 RPM left = 103.399094  RPM right = 103.399094 
t = 7.00 RPM left = 100.496941  RPM right = 100.496941 

 

You can change the formating by modifying this line:

default_output_file:write(string.format("t = %.2f RPM left = %f  RPM right = %f \n",t,engine.RPM.left,engine.RPM.right))

 

You can also change how often the values are written. I have set it to 1.0 second

tNext = tNext + 1.0

 

The engine data that can be exported is described by ED here:

LoGetEngineInfo() -- (args - 0 ,results = table)
engineinfo =
{
RPM = {left, right},(%)
Temperature = { left, right}, (Celcium degrees)
HydraulicPressure = {left ,right},kg per square centimeter
FuelConsumption   = {left ,right},kg per sec
fuel_internal      -- fuel quantity internal tanks	kg
fuel_external      -- fuel quantity external tanks	kg		
}

[chromium]

I red somewhere that this function wasn't working in Dcs world, but I'll vive that a try! Thanks :)

Edited February 20, 2014 by chromium

[AlphaOneSix]

If not you can use "mainpanel" to get the value from the gauge in the cockpit. I would go into more detail, but I have to go to work!

[chromium]

It's ok AlphaOneSix :), If I'll have problems maybe I'll post here another time :).

 

thanks!

[Crash_Horror]

Of course it works, I would not have posted it without testing it.

:thumbup:

[chromium]

Thanks :D

[Crash_Horror]

Actually it appears you are partially right Chromium.

I tested it with FC3 planes and worked fine, but it appears it won't work with the A-10C. This must be very recent, cause I use something similar and had no problems until now. It must be the last patches?

I don't own any helos to test it further, just A-10 & FC3.

I am not familiar with "mainpanel", will have to look into it.

Edited February 21, 2014 by Crash_Horror

[Crash_Horror]

OK here it is.

A version for the A-10C using the 'mainpanel' thingy:

function LuaExportStart()
-- Works once just before mission start --
default_output_file = io.open("YOUR_ENGINE_DATA_FILE.log", "w") -- writes a file to DCS root directory --
end
--------------------------------------------------------------
MainPanel = GetDevice(0)

function LuaExportActivityNextEvent(t)
local tNext = t
local engine_RPM_left = MainPanel:get_argument_value(78) * 100
local engine_RPM_right = MainPanel:get_argument_value(80) * 100
default_output_file:write(string.format("t = %.2f RPM left = %.2f RPM right = %.2f\n", t, engine_RPM_left, engine_RPM_right))
tNext = tNext + 1.0 -- data collected once every second / change this according to preference
return tNext
end
--------------------------------------------------------------
function LuaExportStop()
-- Works once just after mission stop --
default_output_file:close()
end

 

And a version that checks if you fly an A-10C or something "else":

function LuaExportStart()
-- Works once just before mission start --
default_output_file = io.open("YOUR_ENGINE_DATA_FILE.log", "w") -- writes a file to DCS root directory --
end
--------------------------------------------------------------
aircraft = LoGetObjectById(LoGetPlayerPlaneId())
MainPanel = GetDevice(0)

if (aircraft.Name == "A-10C") then -- checks for either A-10C or 'other' aircraft
	function LuaExportActivityNextEvent(t)
		local tNext = t
		local engine_RPM_left = MainPanel:get_argument_value(78) * 100
		local engine_RPM_right = MainPanel:get_argument_value(80) * 100
		default_output_file:write(string.format("t = %.2f RPM left = %.2f RPM right = %.2f Aircraft = %s\n", t, engine_RPM_left, engine_RPM_right, aircraft.Name))
		tNext = tNext + 1.0 -- data collected once every second / change this according to preference --
		return tNext
	end
else
	function LuaExportActivityNextEvent(t)
		local tNext = t
		local engine = LoGetEngineInfo()
		default_output_file:write(string.format("t = %.2f RPM left = %.2f  RPM right = %.2f Aircraft = %s\n",t,engine.RPM.left,engine.RPM.right, aircraft.Name))
		tNext = tNext + 1.0 -- data collected once every second / change this according to preference --
		return tNext
	end
end
--------------------------------------------------------------
function LuaExportStop()
-- Works once just after mission stop --
default_output_file:close()
end

This one also writes the aircraft type at the end of each line. :noexpression:

 

As I understand it, every DCS:level module has its own "mainpanel_init.lua" with its own IDs for different instruments so it propably won't work for others. I may be wrong.

But you get the idea, you can search for "mainpanel_init.lua" in the DCS folder and add more aircraft if you need to.

[chromium]

I'm actually fly KA-50 and sadly the first script prints out a void file, this evening I'll try the second script :) : I think I could handle the modification needed to use KA-50 :)

 

PS:

 

by modifying "aircraft = LoGetObjectById(LoGetPlayerPlaneId())" do you think it's possible to print out data from an IA flight?

I'm trying to plot some thousands of flight performance data to define one or two equations to calculate fuel compsumption based on altitude, weight and airspeed... and also a function that gives me the cruise airspeed at a given weight.

 

To do that, I'm running a file with 10-15 IA flight each time in x30 time compression to have 2h of data exported in .csv file each run in few minutes ... but it contains only the remaining fuel fraction. That's why I would like to have fan speed and istant fuel consumption: this will increase much the accuracy and simplify successive calculations. (I didn't touch export lua, I disable the sanitization module to some other reason).

 

Thanks I'll report if I got it to works!

[Robin_Hood]

Wouldn't instantaneous fuel flow work? Because for FC3 aircrafts at least it is possible to have it. Might be for others, with mainpanel, but gotta find the right argument.

 

For FC3, you can have:

 

local fuelFlow = LoGetEngineInfo().FuelConsumption.left + LoGetEngineInfo().FuelConsumption.left -- in kg/s

I used that for fuel consumption determination for my Su-33.

 

For AI aircrafts, you can try LoGetObjectById(unitId), if you know the ID of the unit you want.

 

BTW, a lot of this is in $User\Saved Games\DCS\Scripts\Export.lua. Only "legacy" export, though, so mainly FC3 (but LoGetObjectById is there for example), there is no mention of mainpanel there.

Edited February 21, 2014 by Robin_Hood

[chromium]

No, dasly it doesn't work for anything that is not FC3 as said in a post above :(

[klem]

I'm interested in using this and on a wider scale for the P51D. I have two issues at the moment. I can't seem to get that Engine data to export, possibly because the Export.lua says:

"-- Please, set EnableExportScript = true in the Config/Export/Config.lua file

-- to activate this script!!

 

I can't find that file and wonder if it is a leftover from FC. Is this necessary in DCSW?

 

I would like to export a lot more flight data as a kind of Black Box. Can anyone point me to the full range of parameters that can be exported?

 

Many thanks,

[chromium]

In the end I used AlphaOneSix script in export.lua to gather some data, and another script written by me to get the info that the other script is missing. I had to elaborate 2 files instead of one, and that is not the best solution for sure :(

[klem]

Of course it works, I would not have posted it without testing it.

:thumbup:

 

Hi Crash_Horror,

 

I experimented more with Export and found some answers but I am still a little stuck and wonder if you can help.

 

There seems to be an impression, from posts here, that Export.lua doesn't work with all DCS aircraft. I am trying to create a 'Black Box' to export a range of data for the P51-D (I have done it in another sim using C# and a/c parameters). Would you know if that is even possible for the P51-D?

 

I tried a stripped down Export.lua, removing all the rem'd statements (which I see now includes many examples), initially with no success so I stripped it down to simply this and it worked, proving the basic function is working ok:

 

 

 

dofile( "C:\\Users\\Administrator\\Saved Games\\DCS\\Scripts\\telemetry.lua ")

 

function LuaExportStart()

-- Works once just before mission start. --

default_output_file = io.open("YOUR_ENGINE_DATA_FILE.log", "w") -- writes a file to DCS root directory --

end

--------------------------------------------------------------

function LuaExportActivityNextEvent(t)

local tNext = t

default_output_file:write("Test Line")

tNext = tNext + 1.0

--data collected once every second / change this according to preference --

return tNext

end

--------------------------------------------------------------

function LuaExportStop()

-- Works once just after mission stop --

default_output_file:close()

end

 

 

Unfortunately when I try this it doesn't

 

 

dofile( "C:\\Users\\Administrator\\Saved Games\\DCS\\Scripts\\telemetry.lua ")

 

function LuaExportStart()

-- Works once just before mission start. --

default_output_file = io.open("YOUR_ENGINE_DATA_FILE.log", "w") -- writes a file to DCS root directory --

end

--------------------------------------------------------------

function LuaExportActivityNextEvent(t)

local tNext = t

local engine = LoGetEngineInfo()

default_output_file:write(string.format("t = %.2f RPM = %f \n",t,engine.RPM))

tNext = tNext + 1.0

--data collected once every second / change this according to preference --

return tNext

end

--------------------------------------------------------------

function LuaExportStop()

-- Works once just after mission stop --

default_output_file:close()

end

 

 

One problem may be that the examples don't include single engine aircraft so I don't know for sure how to refer to, say, Engine RPM.

 

I can't seem to find a comprehensive range of export parameters, even in the Help files.

 

Any ideas please?

[BR55Sevas]

Try to use this

 

local main_panel = GetDevice(0)

   if main_panel then
      main_panel:update_arguments()
      EngRPM = main_panel:get_argument_value(XXX)

 

where XXX is argument number for rotating engine RPM needle, you have to find it yourself by using modelviewer and P51 cockpit.

[klem]

Try to use this

 

local main_panel = GetDevice(0)

      if main_panel then
         main_panel:update_arguments()
         EngRPM = main_panel:get_argument_value(XXX)

where XXX is argument number for rotating engine RPM needle, you have to find it yourself by using modelviewer and P51 cockpit.

 

Thanks,

 

unfortunately I can only see the 3D cockpit of Cockpit_P-51D.edm with a list of textures and in the View/Dialogs/Folder Browser many other items but no instrument specific details. I opened all the folders and tried all the View and Tools options but no joy.

 

Am I looking in the wrong place?

[BR55Sevas]

Use stand alone modelviewer http://forums.eagle.ru/showthread.php?t=86205

[klem]

Use stand alone modelviewer http://forums.eagle.ru/showthread.php?t=86205

 

I did:

ftp://ftp1.files.eagle.ru/mods/model_viewer/

edModelViewer-85950.exe

 

:(

[klem]

Still no joy, I can't see any references to instrument numbers in the modelviewer.

 

I can iterate out the panel items with a for-loop but of course I don't know what the values refer to.

[algerad3]

Not exactly sure what you are looking for but, I am under the impression you want to export the values for the various gauges so that they can be read in a different file.

If so go here http://forums.eagle.ru/attachment.php?attachmentid=96974&d=1397568032

and I have many scripts ready to export most gauges for many modules.

 

The attachments came from http://forums.eagle.ru/attachment.php?attachmentid=96974&d=1397568032

post # 267.

 

I hope this helps.

[danvac]

The engine data that can be exported is described by ED here:

LoGetEngineInfo() -- (args - 0 ,results = table)
engineinfo =
{
RPM = {left, right},(%)
Temperature = { left, right}, (Celcium degrees)
HydraulicPressure = {left ,right},kg per square centimeter
FuelConsumption   = {left ,right},kg per sec
fuel_internal      -- fuel quantity internal tanks	kg
fuel_external      -- fuel quantity external tanks	kg		
}

 

Hi,

I am trying to get fuelconsumption data, but values does not make sense for me. Can somebody check if it is really not working or I am somehow wrong?

Thanks.