Hi There,
I'm having an issue with the 737 Max disarming autobrakes on touchdown whenever the toe-brakes are calibrated via FSUIPC. I've isolated this issue to just the IFly's Max, no other aircraft (payware or default) are affected. I'll provide my system/hardware details below and a test scenario:
System/Hardware
- i7-9700, RTX3060, 32GB Ram, 1 TB SSD, Fully updated windows/drivers
- Thrustmaster Airbus Joystick (brake axis deleted)
- Cyborg V.1 Joystick (brake axis deleted)
- Logitech Flight Rudder Pedals (Where toe brakes are calibrated)
- FSUIPC6, Version 6.2.2 (Registered)
- Prepar3D V5.4.9.28482
- Windows 11 Version 24H2
- iFly 737 Max (Latest version)
Prior to Touchdown:
- Stabilized ILS Approach
- Speedbrakes Armed
- Flaps 30
- Autobrake 3
On Touchdown:
- Power Idle
- Speedbrakes Deploy
- Autobrake setting remains on 3, Disarm amber light ON, brakes do not apply
- Only ground friction and reverse thrust marginally slow down the aircraft
- Toe Brakes manually pressed via rudder pedals, actual braking commences
Notes:
I've tested regular braking of the plane while taxiing, parking, using the realistic parking brake mode, and for differential braking, it all seems to be working perfectly except for the autobrakes on touchdown. In the air on approach, there's no error or issues of any kind, and there is no indication the brakes are being applied erratically by hardware spikes/3rd party software. The issue happens right on touchdown.
Temporary Workaround:
The only solution (not really) that I've focused on has been when I isolated the issue to the FSUIPC brake calibration not working well with the iFly MAX. When I delete the brake calibration lines in the FSUIPC.ini file, the iFly's autobrake system works great on touchdown, however manual braking becomes very rough (i.e. Even with the brakes manually depressed say only 20%, a 100% brake force will apply, the action is not progressive as compared to when it's calibrated via FSUIPC). As a result, deleting the FSUIPC calibration does bring the autobrake functionality back, however it comes at the cost of having an incorrectly calibrated default manual braking axis.
Additional References:
Below is the Brake Section of my aircraft.cfg:
[brakes]
parking_brake = 1
toe_brakes_scale=0.80
auto_brakes = 4
hydraulic_system_scalar = 1
Below is the Brake Calibration from my FSUIPC.ini file:
[JoystickCalibration]
LeftBrake=-16383,16383/8
RightBrake=-16383,16383/8
SlopeLeftBrake=15
SlopeRightBrake=15
Finding Summary
The core issue here seems to be that the FSUIPC brake calibration is somehow disarming the iFly Max's autobrake function on touchdown.
It confuses me because this product does require the latest version of FSUIPC to function, however any calibration made via FSUIPC is wreaking havoc with the aircraft's autobrake system. I will attach my FSUIPC log file, my FSUIPC settings, and all relevant screenshots of the issue. Any help I can get on this would be greatly appreciated!
Thank you in advance for your help
****Update, I can only attach my INI file for FSUIPC, my log file from the latest file is too large to be attached or even pasted below. The logging was started at approx. 1000 AGL on approach to CYUL ILS RWY06L in the iFly 737 Max 8, and was stopped during the rollout on the runway after touching down. I used FS interrogate to identify any Brake-related codes in the log file. During the logging period, manual brakes were not used at all, nor was manual braking registered in the sim from what I could see. What's interesting though is that the log file read a bunch of lines coded as Read "32F9" which is the "Brake being used Flag", var U8, Size 1, Read Only, Category Controls. I'm absolutely confused over what is really causing this issue, and if it's an FSUIPC issue or an iFly issue (as no other aircraft is experiencing anything like this).
FSUIPC6 INI File.ini