Cabin environmental bug - see video
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@Black-Square I think I have caught the ECS in the piston Duke misbehaving. Hot out on the ground, running the AC. Take off, climb, it gets cold out. Somehow, despite still being set to auto cool, it's making heat.
Let me know if you want a video for this one
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Do you say that because the cabin is maintaining the temperature shown in the screenshot, or simply because of the green gradient on the output from the combustion heater? If the former, then I will look into it.
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@Black-Square Both actually. As I climbed, the temp in the cabin didn't go lower, and the green gradient seemed odd too as there would be nothing making heat..?
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@Black-Square - FYI, it was indeed the right engine RPM that was apparently my problem. On my latest flight I needed A/C on the ground and then heat at altitude, and I got both of them to work pretty well. I think it’s an interesting exercise to run the right engine fast enough to operate the compressor just often enough to keep the cabin from getting hot while still managing to do the required ground ops … taxiing being a particular problem. Also, while I may not know exactly what I’m doing with everything in this plane yet, I definitely was never pulling out the intercooler bypass handles … that clearly was NOT going to cool things off. 🤓
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@Black-Square Just curious if you found anything wrong here?
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I finally got around to testing this. Yup! You got one!
It only happens when flying with the AC on, after it's been effective, into colder air. It can also happen the other way around to produce erroneous heat by flying from colder air into warmer air. I'm quite surprised I didn't catch this one already. Thanks you for pointing it out. All fixed now!
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@Black-Square I just wanted to say how wonderful your attitude is to us folk who are pointing out potential issues with your amazing products. I'm well aware of how much easier it is to comment on something than it is to create the thing being commented on, and I wouldn't blame you at all for being slightly defensive. Instead, you are open and welcoming of such feedback, with a complete lack of any visible ego, which is so rare and such a wonderful thing. Thank you.
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@Black-Square Right on, glad I could help by finding it lol! The environmental simulation is one of my fav parts about your aircraft. I mean, besides everything else too lmao.
You rock!
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@Black-Square I seem to have discovered another issue.
If you want to try to reproduce this:
I took off from KMIA heading to KDAB, everything normal. Cruised at 24,000ft. Descending at ~1500fpm, nice slow cabin pressure descent of ~700fpm. I had the intercooler bypass knobs pulled out as they should be in a high altitude cruise. I had the cabin thermostat set to 68 deg F the whole flight. During descent, I bumped the cabin thermostat up to 70 deg F and instantly the auto heat logic decided it was broiler time. I pushed in the intercooler bypass knobs and it reverted to normal behavior. ECS master mode to Off for 10 seconds, then back to auto heat, thinking this may reset the logic. Started recording this video at this point. Pulled out the knobs again and the auto heat logic said again "Let's broil the cabin!" I pushed them back in and it went back to normal again. -
Once again, thank you so much for the video. That's the most useful tool when troubleshoot anything like this.
That one looks like the correct behavior to me, though. The intercooler bypass has the power to melt components in the ducting system without any help from the combustion air heater. To quote the reciprocating engine Duke pilot the first time I delivered him my software to test, "Ok, make sure both of those are in before start so we don't kill ourselves." The reason the heating vent heats up faster and hotter than the plenum is because the plenum air is the source for the heater. The heater always has the ability to raise the temperature of the plenum air, so naturally, it will be hotter. I hope that one made sense? As far as I'm aware, everything is working correctly in that situation, but I will add this to my list to test next time I have the simulator open. I typically test many things at once, so this will be one of them :)
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Thank you BlackSquare for bringing me a twin turboprob. This turbine Duke is fantastic! I have been using the pad as well to learn the details of the heating and cooling. Well done!
Quick question… Are the valves for the pilot and copilot air flipped compared to the defrost? With the defrost lever pushed in the valves on the pad are closed. When I pull the lever they open to provide air to the windshield. But the pilot and copilot valves are open on the pad with the levers pushed it. When I pull the levers out for those two they close.
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Oops disregard I just read above that some valves are push to open and others are pull to open.
