Jeff R
Well Known Member
The field elevation at my home airport (Merritt Island) is about 6 feet. My Skyview GPS, along with a back up Garmin Aera GPS, will correctly report the altitude. On my Skyview altimeter, the correct elevation appears with the altimeter adjusted to within .01 to .02" of what the AWOS station provides.
In the air, however, I am seeing significant differences. For example, when I went flying at about 4,000 ft per the altimeter, the GPS units were reporting about 4,300 feet. That is a pretty significant difference!
I witnessed the original airspeed/altimeter/transponder calibration, and the Skyview altimeter was right on all the way up to 18,000 feet, so I don't think there is an error in the Skyview static pressure sensor.
Wondering if my GPS antennas were blocked by the fuselage, I flew N, W, S and E and the altitudes didn't vary at all.
I use the Safe Air static ports, one on each side of the fuselage, connected together and to dual ADHRs sensors in the tail.
I tend to believe the GPS altitudes are being reported correctly and since I know the altimeter has been tested and found accurate, the problem points to the static ports.
Anyone else experience big differences between altimeter and GPS altitudes, and has anyone else with the Safe Air static ports had altimeter errors?
In the air, however, I am seeing significant differences. For example, when I went flying at about 4,000 ft per the altimeter, the GPS units were reporting about 4,300 feet. That is a pretty significant difference!
I witnessed the original airspeed/altimeter/transponder calibration, and the Skyview altimeter was right on all the way up to 18,000 feet, so I don't think there is an error in the Skyview static pressure sensor.
Wondering if my GPS antennas were blocked by the fuselage, I flew N, W, S and E and the altitudes didn't vary at all.
I use the Safe Air static ports, one on each side of the fuselage, connected together and to dual ADHRs sensors in the tail.
I tend to believe the GPS altitudes are being reported correctly and since I know the altimeter has been tested and found accurate, the problem points to the static ports.
Anyone else experience big differences between altimeter and GPS altitudes, and has anyone else with the Safe Air static ports had altimeter errors?