Simviation Forums

I really feel like an idiot - but what does "altimeter 2992" or "2994" or similar altimeters actually mean?  ???
must have something to do with the weather I think...

29.92 is considered standard barometric pressure at sea level. IE, the weight of the air on top of us. It is measured inches of mercury and is stated by how far up a glass tube the atmosphere forces the mercury, therefore the terminology of high pressure and/or low pressure areas in the determination of weather.
an altimiter measures the same thing and adjusts it to height above sea level in hundreds or thousands of feet. of course, the higher you go the less air is on top of you ... less weight , or "pressure".
The variations that occur are reported by ATC in inches of mercury, with 29.92 being considered standard pressure (at sea level) Knowing that all aircraft in the area have the same reading from ATC guarantees that their stated altitude is correct, thus guaranteeing separation from each other.

Perfect...thank you!!!

Good explanation,Papa metro,i didn't knew that my self,and i always forget to ask it here
 thanks  ;)

Just want to add; we europeans don't use "In hg", but rather the hecto-Pascal (hPa or millibar)
So 29.92 In hg equals 1013 hPa  :)

Also, since 29.92/1013 is considered standard atmospheric pressure, this is the altimeter setting you'd use above the Transition Altitude.

this is the altimeter setting you'd use above the Transition Altitude.

You mean at or above FL 180?

You mean at or above FL 180?

Aye.

Airbus gives you a nice, annoying warning sound when you forget to turn it back to 29.92 at FL180.

You mean at or above FL 180?

Yes, if you live in the US. The TA where I live is at 5000ft  :)

VFR planes used 29.92 .  IFR international flights used 1013hpa. it usually depends with controller or place


The standard pressure and temperature is mostly used to test flight a new  plane.


it is a standard rule to use 29.92 or 1013 above transistion altitude. it depends on the country on what transistion altitude they have. for ex. philippines, the transistion altitude here is 11000. in FS  18000 is the standard transistion altitude in state.

VFR planes used 29.92 .  IFR international flights used 1013hpa. it usually depends with controller or place


The standard pressure and temperature is mostly used to test flight a new  plane.


it is a standard rule to use 29.92 or 1013 above transistion altitude. it depends on the country on what transistion altitude they have. for ex. philippines, the transistion altitude here is 11000. in FS  18000 is the standard transistion altitude in state.