mtbparker

Hi Coop, I've only gotten two flights in with the 1.2.0 version since reverting. I'd like to get 2 or 3 more in before making any REAL claims about CHT & version. It will help eliminate Wx as a possible influence. Then I'll try the experiment that you suggest. Please bear with me. It may take a few days to get that done. I did get a 2nd flight in last night with 1.2.0 and I did have CHT issues. However, I took off with 36*C OAT / +22* ISA. Those are significantly warmer conditions than the other cases so far. In this case, I was able to level off and bring the CHT temps back down -- which is notably different. Thanks for your patience and thanks for working with me on this. Tom

Hi Coop, I'm leaning the engine per the climb checklist (17.5 FF) and am climbing at the suggested minimum of 130KIAS. I've also tried climbing at full rich which brings down the EGT/TIT and consequently has a minor cooling effect on the CHT as well. Same problem. It's always cylinder 1 that fails first. If I don't level out and gain speed, then cylinder 4 is next. If I do level out, I'm able to keep it so that only cylinder 1 fails. I've been able to reliably reproduce this every flight since installing 1.2.1. Another thing to note is that even if I level out immediately upon getting the warning, the C1 temp continues to rise to the point of failure and shutdown. It's almost as if it's getting into a thermal runaway situation. Out of curiosity, I reverted back to 1.2.0 this morning and was able to climb per the checklist without any problems on a test flight this morning. This only is an issue with the SR22TN. The SR22 seem to be okay (on the one flight I tried.) Tom

Ah! Ok. I was interpreting it to mean there might be something in the engine intakes. Nevermind then. I'll keep plugging away at it. Unfortunately, I don't get very far into my flight before the cylinders overheat and shutdown one-by-one. This will limit my use of the plane until I get it figured out.

Hi Coop. Thanks for the response. I dug in a bit and see some needed maintenance that looks like it's related. It says: These messages persist after every possible attempt at engine maintenance available. Is there some way to clear these? Thanks again, Tom

Hello Folks, With this latest release, I'm experiencing extremely unusual CHT overheat issues in the turbo version. I fly this plane religiously, so I'm quite familiar with it's normal behavior and know that it's something with the release. Even though nothing is mentioned in the Change Log, were the engine settings tweaked? Thanks in advance, Tom

Okay. Thanks for the help.

I'm not so sure about that. Yes, the error is a very generic error indicating that the graphics card is crashing and not recovering. (See link below for a good explanation.) The problem is that it only occurs with this aircraft. There is a corresponding secondary symptom that also immediately precedes the crash. The audio will "buzz". In my experience as a SW developer whose worked on D2A conversion of packetized audio, this happens when the stream of audio packets stops flowing to the A2D converter. Since 1.0.1, I hear that audio buzzing now multiple times in a single flight. Approximately half the time, that buzzing is immediately followed by the CTD with the error mentioned above. The other half of the time it seems to recover. Never do I have a CTD without that error. And, again, it only happens with this aircraft. https://forums.x-plane.org/index.php?/forums/topic/209672-ctd-vulkan-device-loss-error/&tab=comments#comment-1896351 Yes, I'm open to the possibility that it's outside the scope of this aircraft. If I hear the buzz and/or see the CTD anywhere else, I'll be sure to update here so that I don't waste precious time chasing the wrong problem.

Hey Folks, The 1.0.1 update has a lot of great improvements. I just want to report in, however, and let you know that I still get CTDs very regularly. The error message in the log reads: Thanks again for the effort. This is a beautiful plane. I'm running XPlane b17. EVGA 1080Ti graphics card on an Intel-5930K and 16GB RAM Tom