I have RC4 , ASA B433 and FSUIPC 4.50 unregistered running on my computer. OS is Vista 64bit. Most of the time RC gives me the wrong QNH at the departure airport when Wx briefing. Pressing B in FSX gives me the right QNH according ASA.Default weather settings in FSUIPC is already done. Strange thing is that temp and wind are ok.DWC in ASA is offLocked at nearest airport in ASA onEdward

Don't press that useless "B" command. Set QNH manually. I'd use the setting as given by RC.

The QNH given by RC is different too what ASA shows. I don't use the "B" normally but this time I was looking if ASA and FSX had the same QNH.So it was and RC was reporting a different QNH.Must I trust the QNH of RC and ignore what ASA & FSX come up with?Edward

I have RC4 , ASA B433 and FSUIPC 4.50 unregistered running on my computer. OS is Vista 64bit. Most of the time RC gives me the wrong QNH at the departure airport when Wx briefing. Pressing B in FSX gives me the right QNH according ASA.Default weather settings in FSUIPC is already done. Strange thing is that temp and wind are ok.only thing you can do is make a log. but the bottom line, rc only sees what the pressure is, because fsuipc sees what the pressure is in fs. so i'm only reporting what fs is. so the log will only show me what fs says.what does ASA, FS, and RC say the pressure is?DWC in ASA is offLocked at nearest airport in ASA onEdward

Did missed something???Edward

The QNH given by RC is different too what ASA shows. I don't use the "B" normally but this time I was looking if ASA and FSX had the same QNH.So it was and RC was reporting a different QNH.

For now I've given up on ASA and gone back to ASX which was much more reliable. I get variations in ASA between what it is setting for "global" weather (for populating unset weather stations) and what it is setting at nearby airports. Sometimes these variations are happening alternately every few seconds, so what RC gets is what is "correct" at the time it reads it, but not necessarily correct at the weather station or even a second later.Pressing "B" sets the pressure on the altimeter to the surface pressure at the position (Lat/Lon) or the aircraft, which is rarely if ever the same as that of the weather station. If you are using ASA's DWC option, then the weather at the aircraft will be what ASA is currently setting, but it won't necessarily be the weather at any particular weather station.I tried to analyse exactly why ASA's reported weather (on its screen) rarely coincided with the actual weather at the station it was referring to (as opposed to at the aircraft), and I gave up. It was hardly ever the same in pressure, temperature, winds or even cloud cover.If you run ASA in FS9 mode, using the fiddle Fede discovered and reported elsewhere (just puuting a copy of FSUIPC.DLL into the FSX modules folder), then things tie up much better (though the winds seem to be out by the Mag Var ..?), but the performance can suffer a little as a result of the additional traffic, ASA->FSUIPC->SimConnect. Since I still had an operable ASX installation, I went back to that for now.RegardsPete

Pete,Thanks for the explanation. If I understand well I got to use the QNH that ASA reports on the briefing at the departure airport while RC reports "unreliable"QNH due to the system?Edward

Thanks for the explanation. If I understand well I got to use the QNH that ASA reports on the briefing at the departure airport while RC reports "unreliable"QNH due to the system?

I've not experienced any unreliable reports at the departure airport, provided that you allow the weather from ASA or whatever to be established before getting ATIS. It takes quite a time. Get FS loaded and running with ASA a while before you ask RC for ATIS -- my preflight checks and setup in my cockpit take just about long enough! ;-)The only odd stuff I've had with ASA is really with the arrival weather, when requested about 70-80 nm out. That's actually most often correct, or close, but then odd assorted different (and wildly different) QNH reports come in at intervals till landing (and even after). I ignore those that make no sense. I think it's all to do with the numbers of FS weather stations in the vicinity and whether they've all been properly populated with correct weather from ASA. Those that haven't for any reason, contribute erratic values to the interpolation being read and used by RC. This did use to happen with ASX and even ASV6.5, but it is much rarer in those. RegardsPete

Pete,Thanks for the explanation. If I understand well I got to use the QNH that ASA reports on the briefing at the departure airport while RC reports "unreliable"QNH due to the system?Edward

just to be clear, RC only reports what it sees. it doesn't read the weather from an external source, it doesn't read it from the internet, it doesn't read it directly from ASA or ASX, it reads it from FSIF ASA says 29.92, and FS says 30.12, i'm reporting 30.12as pete says, the problem isn't in RC, it's the fact that FS hasn't caught up with ASA

In rereading your original query, I have to ask if you are allowing ASA to fully load before adjusting the QNH? I have seen ASA take anywhere from two (2) to as much as five (5) minutes to fully load in my FSX. I have left the "enable written <or however it's worded> messages" turned on in ASA. I get the green runner across the top of the screen stating that ASA is beginning the wx update process, then a few minutes later the green runner states that ASA has completed the wx updates. If ASA hasn't completed loading wx, this might be another possibility as to why you are getting somewhat differing readings from ASA and RC. The green runner is kind of cheesy looking when you are trying to get ATIS reports. Oh well.