Bleed pressures are showing 50-70 PSIG on APU or engine respectively at idle. Nominal for engine start is 24. Looking at the new pneumatic system sdk, it appears one possible fix may be to modulate the valve position and treat it like an actual load control valve rather than a binary state valve. Additionally the HI PRESS lights do not extinguish at between 73-75% N3.

Edited yesterday at 04:02 AM1 day by Mike

Here is the relevant SDK link and excerpt:
https://docs.flightsimulator.com/msfs2024/html/5_Content_Configuration/CFG_Files/System/Pneumatic_System_Setup_Information.htm

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Valve Modes

When the pneumatic system runs, there are several modes that can be selected for the valves assigned to the system lines. However, these are not fixed modes that are only set once when the aircraft system is initiated, but instead they are changeable during the flight according to what the pilot does on the overhead cockpit controls. As such they are not defined within the CFG files by any parameter (although you can set them using the FLT file [PNEUMATIC_SYSTEM_EX1.N] section for specific flights or missions).

 

The possible valve modes available are as follows:

• Auto: The system manages the target status of the valve on its own.

• Manual: The target status of the valve is set by the pilot on the overhead.

• Open: The valve is forced open.

• Closed: The valve is forced closed.

 

When the valve is forced open or closed, it will ignore any target status change from the system. It should also be noted that an open valve can be set to a percentage open, for example 50% open. However, this does not mean that the airflow will be cut to 50% since a semi-closed valve will cause a pressure increase on the input side and so make the flow greater than the 50% one might expect. To have the flow match the percentage opening of the valve, the MaxFlow parameter can be set on the input Line, and this will block the flow proportionaly such that closing the valve will cap the flow rate at the percentage of MaxFlow corresponding to the percentage that the valve is closed.
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Set is accomplished by:
https://docs.flightsimulator.com/msfs2024/html/6_Programming_APIs/Key_Events/Aircraft_General_Systems.htm#PNEUMATICS_VALVE_SET

Edited 5 hours ago5 hr by Mike