Altimeter bug
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I have found in TE that altitude in the HUD is different that altitude in external view. Altimeter setting correct, and talking about baro, not radar. ACMI records external altitude settings, not HUD/cockpit. Tested in F16CM Block 52 and F/A-18A. Korea theater
Any idea?
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This was the case in BMS 4.32 as well. I assume it’s the same “bug” as in FS9/X, where the information that can be toggled in the left top also shows a different value than that on your altimeter.
I’m not entirely certain, but I believe the info displayed on the info line is true altitude (altitude above sea level), while your altimeter - depending on its setting - shows either barometric altitude (referencing local QNH), absolute altitude (aka Height or Radar Altitude, above ground, at airfield this is also shown when referencing local QFE) or pressure altitude (referencing the 1013.25hPa / 29.92 InHg line).
It also has to do with deviation from the International Standard Atmosphere (dry air at 15°C and 1013.25 hPa/29.92InHg, and a few more other things), which is not calculated into either that is shown on your altimeter, while it might be in the altitude shown in the info line.
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External shows true height above datum (perfect altitude). AI fly this altitude exactly.
Depending on the weather info loaded into BMS the altimeter can be very different at each altitude even if set for the correct QNH (which only guarantees correct at airfield surface). This is because the instrument must make a guess about what air pressure is at what altitude based on a model of a predictable atmosphere. If BMS atmosphere is weird then the altimeter instrument will be a bad match away from calibration point.
If you use FSMAP or other BMS weather which is based on real world data (e.g. GRIB converted) then altimeter will have much smaller errors. The advice is to get/make some FSMAP files made from real world weather data.
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I have found in TE that altitude in the HUD is different that altitude in external view. Altimeter setting correct, and talking about baro, not radar. ACMI records external altitude settings, not HUD/cockpit. Tested in F16CM Block 52 and F/A-18A. Korea theater
Any idea?
… do you confirm you are testing this in a standard atmosphere condition (1013 or 29.92 @ 15°C) ?
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Not sure about temperature, but standard presure.
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…depending on just who’s Hornet you are flying, the altimeter setting could be in either mB or in Hg…so if that’s messed up in the model between the STBY and the HUD…
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no bug
