KotlaSheetal

Part of the problem could be solved after changing the units from "Percent" to "Pounds per hour", as Oliver wrote. After this change the fuel flow figures are correct for all aircraft I tested, except the PMDG 737 (I have not checked the 777 yet). So there seems to be some kind of factor or function used by PMDG to get the FF figures displayed on the 737 engine displays.

Hi Oliver Thank you very much for your answer, much appreciated. Perhaps it could be some kind of type issue, I will make a few tests using other datatypes and post the result here. Cheers Peter

Hello I am trying to read the engine data out of the PMDG 737 NGX aircraft via SimConnect. The application is running, I am reading the data using the following variables: simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG N1:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG N2:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG CORRECTED FF:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG MAX TORQUE PERCENT:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG PRESSURE RATIO:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG JET THRUST:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG FUEL FLOW PPH:1", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG N1:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG N2:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG CORRECTED FF:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG MAX TORQUE PERCENT:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG PRESSURE RATIO:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG JET THRUST:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); simConnect.AddToDataDefinition(DEFINITIONS.EngineData, "TURB ENG FUEL FLOW PPH:2", "Percent", SIMCONNECT_DATATYPE.FLOAT64, 0.0f, SimConnect.SIMCONNECT_UNUSED); Actually I am particularly interested in the fuel flow data. the figures I get from these variables do not match the fuel flow figure displayed on the PMDG engine display. Also the figure for TURB ENG CORRECTED FF:1 and TURB ENG CORRECTED FF:2 are much larger than the values read from TURB ENG FUEL FLOW PPH:1 and TURB ENG FUEL FLOW PPH:2 (e.g. FF PPH = 12.95, FF corrected = 218.92). The FF displayed on the engine display is 0.69, the value I get from the simvar is 12.72. I tried to find out if there is a kind of factor or function which relates these values, but did not succeed so far. I also already searched in the offset lists and PMDG SDK files, but there are no offsets or variables available. Does anybody know of some coefficient, function or something else I can use to get the values displayed in the 737 engine display? Thanks a lot Peter

It is N2 up to between 20% - 25%, then flip the fuel lever to introduce the fuel. The engine should then light up.

Hi Thank you for your answers. Yes, I mean the N2 rotation percentage value. The reason is that I am writing a lua script to automate some actions, and I want to know when the N2 reaches around 21% to activate the fuel switches. It must be related to how the addons handle this internally, the Dodosim Bell 206 has the exact same behavior. I will try to ask the PMDG support directly.

Hello I am wondering if somebody can tell me why the PMDG 737 NGX Engine N2 values are available as values from the offsets 0x896 (Engine 1) and 0x092E (Engine 2) only after the engine has ignited. On other aircrafts (even other add-ons) the N2 values are available for the whole duration of the engine spoolup. The same applies to the PMDG 777. Does anybody have a hint? Thanks a lot, Sheetal