Does what it says on the label.Hi.QFE strikes me as being potentially useful (and that opinion has just been confirmed while reading a recent thread on ILS landings). It's easy enough to set for a departure airport, after all I'm only a few feet above the ground on the apron, but how can I determine QFE for my destination?Thanks, and Merry Christmas to you all.D

If you have either ASE or Flight Keeper, you can determine the pressure at anywhere there is a reporting station, and with Flight Keeper you could also get the airport elevation data from the ACARS, or you could of course read it from the FS map or an aerodrome chart. Incidentally, FK has just been updated to V3.10, which works with ASE too, so grab that update if you have Flight Keeper.Since we know air pressure decreases at more or less 100 hectopascals (aka Millibars) per 800 meters (or one inch of mercury per 1000 feet if using a US altimeter and imperial settings), it is possible to work out any adjustment necessary in the kollsman window in order to have your altimeter read zero at a runway threshold. In reality I'd normally call the flight line and get the setting, and I have actually been cheeky in the past and just got someone to whizz their altimeter to zero in an aircraft on the deck where I'm landing in order to find it out LOL, which is the kind of thing you can get away with doing at small airfields where you know everyone, but FS ATC isn't going to let you do that, so it's worth having a calculator in your flight sim arsenal for such things. Aerosoft's Flight Calculator is a nice little add on for all that kind of stuff.Worth noting however, is that it would probably only be useful for GA aircraft without an FMC. You could potentially screw up an FMC's ILS approach calculations if you set QFE. I'm pretty sure airliner FMCs take into account the field elevation from their database and calculate stuff based on terrain height in relation to sea level.Al

Thank you Al.I derived an empirical formula from forty-odd airports around Europe once I was home last night. Didn't bring it with me though... sorry.It was interesting to note that I can't set QFE for elevations above about 2000' when QNH = 1013 mb. FS9 altimeters just won't adjust that far but since I fly mostly GA around Britain that won't bother me. Within the range, it's a nice straight line relationship.Regards,D

DaveAs you fly in the UK using Hectopascals as the altimeter setting, the formula is 1Hp = 30 feet. So to get the QFE, divide the airfield elevation by 30 and then subtract the answer from the QNH. Eg airfield elevation 600 ft, QNH 1020 - divide 600 by 30 = 20, 1020 - 20 = 1000. QFE = 1000.Merry Christmas to you.Martin Plain

31.3857 :( vololiberista