JayJ Posted September 5, 2023 Posted September 5, 2023 (edited) Problem: Altitude values displayed by barometric altimeter show high error. The higher the altitude, the higher the error. (As much as 600 meters at 5000 meters ASL). Description: For missions where temperature is high and sea-level air pressure is set to high. In provided track I started in the runway of Batumi (correct QFE already pre-set). As I ascend the display error worsens. Similar issue observed for Su-27 and for low temperature/pressure combinations. Primarily would appreciate a confirmation that it is a bug. Secondarily, I'd appreciate a fix. altimeter_report.trk Edited September 5, 2023 by JayJ
razo+r Posted September 5, 2023 Posted September 5, 2023 40 minutes ago, JayJ said: Problem: Altitude values displayed by barometric altimeter show high error. The higher the altitude, the higher the error. (As much as 600 meters at 5000 meters ASL). Seems to be correct. There is a 4% temperature correction for each 10 degrees C deviation from ISA. Your mission is ISA+35, so a correction of 14% per 1000ft has to be applied. If you position yourself at 1500m (4920ft), just at the max of the radio altimeter, you will read 1330m (4360ft) on your altimeter. 14% of 4360ft is 610ft, add that on top of the 4360ft and you'll get your true altitude of 4970ft, which is quite close to the 4920ft, shown on your radar altimeter. So, unless I do something terribly wrong, it does seem to be correct to me. 1
Recommended Posts