Hello,
I have noticed a climb performance problem on PMDG 737-700 MSFS2020 with running FSUIPC7.
The problem is vertical speed and climb performance is very low after FL200. And at FL280 the aircraft is no more able to climb and maintain required airspeed.
I made several flight sessions with the next results:
1. FSUIPC7 was running whole the flight - issue was there. Was not able to climb above 28000.
2. FSUIPC7 was NOT running (exit application) whole the flight. No issues was there. Climb performance is good. Climb to 38000 fast.
3. FSUIPC7 was running from the start of flight. At FL200 where climb perfomance issue happened I exit FSUIPC7 application. Then after 3 seconds vertical speed began to rise sharply. Then I re-launched FSUIPC7 application. Vertiacal speed was OK for the rest of the flight.
I have to re-launch FSUIPC7 every flight after takeoff at climb phase for normal gaming.
Tried with versions 7.3.7 and 7.3.8b with similar results. PMDG 737-700 is the latest version 3.00.0031.
I had opened a support ticket with PMDG team and they suggested to ask FSUIPC team for investigation.
Also I enabled events logging in the FSUIPC.
When there was the issue (below FL200 with climb problem) - it was too much ROTOR_BRAKE events in the log.
Almost whole the log has these ROTOR_BRAKE events:
1345968 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 38303 (0x0000959f) ROTOR_BRAKE
1346000 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 38303 (0x0000959f) ROTOR_BRAKE
1346062 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46503 (0x0000b5a7) ROTOR_BRAKE
1346343 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346359 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346375 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346406 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346422 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346453 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346468 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346500 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346531 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346562 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346593 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346625 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346656 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346687 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346703 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46203 (0x0000b47b) ROTOR_BRAKE
1346718 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1346750 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1346797 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1346812 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1346843 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1346859 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1346953 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46301 (0x0000b4dd) ROTOR_BRAKE
1347031 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46304 (0x0000b4e0) ROTOR_BRAKE
1347047 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1347078 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1347093 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1347125 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 46303 (0x0000b4df) ROTOR_BRAKE
1347265 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 36603 (0x00008efb) ROTOR_BRAKE
1349156 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 34903 (0x00008857) ROTOR_BRAKE
1349312 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 33903 (0x0000846f) ROTOR_BRAKE
1349390 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37303 (0x000091b7) ROTOR_BRAKE
1349406 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37403 (0x0000921b) ROTOR_BRAKE
1349437 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37403 (0x0000921b) ROTOR_BRAKE
1349656 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349672 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349703 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349718 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349734 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349765 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349797 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37501 (0x0000927d) ROTOR_BRAKE
1349890 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37504 (0x00009280) ROTOR_BRAKE
1349906 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349922 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37503 (0x0000927f) ROTOR_BRAKE
1349953 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37403 (0x0000921b) ROTOR_BRAKE
1349984 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 37203 (0x00009153) ROTOR_BRAKE
1350015 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 36003 (0x00008ca3) ROTOR_BRAKE
1350031 26324 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 35703 (0x00008b77) ROTOR_BRAKE
After exit and re-launch FSUIPC it was only two ROTOR_BRAKE events:
16141 4104 Starting WAPI...
16141 4104 [INFO]: **** Starting FSUIPC7 WASM Interface (WAPI) version 0.5.10 (WASM version 0.5.9)
16141 4104 [INFO]: Connected to MSFS
16172 4104 Ready Flags: Ready-To-Fly=Y, In Menu=N, In Dlg=N
16219 29444 Lvars/Hvars received - checking aircraft autos....
20766 4104 *** EVENT: Cntrl= 67226 (0x0001069a), Param= 0 (0x00000000) WINDSHIELD_DEICE_OFF
32172 4104 **** Thread 13604 created for PerfTimer
69391 4104 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 99003 (0x000182bb) ROTOR_BRAKE
69422 4104 *** EVENT: Cntrl= 66587 (0x0001041b), Param= 99003 (0x000182bb) ROTOR_BRAKE
72938 4104 *** EVENT: Cntrl= 65567 (0x0001001f), Param= 0 (0x00000000) VIEW_MODE
72938 4104 EV_KEYDOWN received: 0x23 (#)
72938 4104 KEYDOWN: VK=35, Waiting=0, Repeat=N, lParam=0 (0x0), Shifts=0
72938 4104 .. KeyDown received from FS but not programmed
73031 4104 EV_KEYUP received: 0x23 (#)
73031 4104 KEYUP: VK=35, Waiting=0, Shifts=0, lparam=0 (0x0)
73031 4104 .. KeyUp received from FS but not programmed
97531 4104 *** EVENT: Cntrl= 65567 (0x0001001f), Param= 0 (0x00000000) VIEW_MODE
97531 4104 EV_KEYDOWN received: 0x23 (#)
97531 4104 KEYDOWN: VK=35, Waiting=0, Repeat=N, lParam=0 (0x0), Shifts=0
97531 4104 .. KeyDown received from FS but not programmed
97578 4104 EV_KEYUP received: 0x23 (#)
97578 4104 KEYUP: VK=35, Waiting=0, Shifts=0, lparam=0 (0x0)
97578 4104 .. KeyUp received from FS but not programmed
127094 4104 EV_KEYDOWN received: 0x1B ()
127094 4104 KEYDOWN: VK=27, Waiting=0, Repeat=N, lParam=0 (0x0), Shifts=0
127094 4104 .. KeyDown received from FS but not programmed
127109 4104 *** EVENT: Cntrl= 66055 (0x00010207), Param= 1 (0x00000001) PAUSE_SET
129516 4104 Sim stopped: average frame rate for last 121 secs = 48.3 fps
129516 4104 Max AI traffic was 0 aircraft
Thank you for support.