uwochris
Flightinfo's sexiest user
- Joined
- Dec 21, 2001
- Posts
- 381
Hey guys,
Another question here. I just want to make sure I am interpreting the density error correctly.
I know that one factor leading to erroneous KIAS indications is the "density error." I also understand that air density is directly related to barometric pressure and inversely related to air temperature.
Now, this is how I intrepret the effects of density error... the airspeed indicator (like the altimeter) must be calibrated during the manufacturing stage, and the standard atmosphere is used. So, on very cold days (or lets say... higher than standard pressure days), the air tends to be more dense than it is on a standard day. This increase in air density causes the pitot tube to misinterpret this dense air as an increase in ram air pressure (ie. more "air molecules" entering pito tube, makes it seem as though more air is entering, and thus, a higher ram air pressure. This all leads to a higher KIAS.... ie. on cold /very high pressure days, your actual airspeed is likely to be lower than indicated.
So, am I correct in my interpretation?
Thanks a lot for the responses. I know sometimes I ask very detailed questions and I apologize for that. I'm just the type of person that has to be able to understand every little detail, without confusion- it drives me crazy sometimes, as it is impossible to understand everything!
Another question here. I just want to make sure I am interpreting the density error correctly.
I know that one factor leading to erroneous KIAS indications is the "density error." I also understand that air density is directly related to barometric pressure and inversely related to air temperature.
Now, this is how I intrepret the effects of density error... the airspeed indicator (like the altimeter) must be calibrated during the manufacturing stage, and the standard atmosphere is used. So, on very cold days (or lets say... higher than standard pressure days), the air tends to be more dense than it is on a standard day. This increase in air density causes the pitot tube to misinterpret this dense air as an increase in ram air pressure (ie. more "air molecules" entering pito tube, makes it seem as though more air is entering, and thus, a higher ram air pressure. This all leads to a higher KIAS.... ie. on cold /very high pressure days, your actual airspeed is likely to be lower than indicated.
So, am I correct in my interpretation?
Thanks a lot for the responses. I know sometimes I ask very detailed questions and I apologize for that. I'm just the type of person that has to be able to understand every little detail, without confusion- it drives me crazy sometimes, as it is impossible to understand everything!