swomilan
lvl.4
Mexico
Offline
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Compass Calibration aka dance with the Phantom, we've all done it but why? There are many theories out there ( including my own ) but I want some real facts not guesses as educated those may be
A. What's behind the compass calibration?
1. Is it just to make corrections for magnetic interference around the magnetic compass (horizontal turn)?
2. Is it also determining the nose position in relation to the compass (vertical turn)
3. ....what else please, specify?
B. Which components on the Phantom are being calibrated when we do the compass cali?
1. The magnetic compass module?
2. Level sensors?
3. Inertia sensors / Gyros?
4. ...other, please specify ?
C. What would happen if the magnetic sensor north is off by a few degrees?
1. Unstable position hold?
2. J-hook or toilet bowl pattern?
3. Not much?
4. ...what?
D. What would happen if the magnetic sensor north is off by 180 degrees after calibration (e.g. calibrating with very large magnetic interference in the area)?
1. Can't happen, it would be detected and create a compass error?
2. Not much?
3. The unit would take off never to be seen again?
4. ...?
E. What would happen if a large magnetic interference that throws the magnetic compass off is encountered in flight (e.g. flying close to a large metal structure, mountain with magnetic rocks,...)?
1. unstable flight?
2. unstable hold?
3. loss of control?
4. Error, autoland?
5. bye bye Phantom?
6. ...?
F. For which flight modes is the magnetic compass information used/important?
1. GPS-Atti hold?
2. GPS-Atti flight?
3. Atti only flight?
4. Manual flight?
5. Waypoint flight?
6. RTH?
7. IOC HL?
8. IOC CL?
9. ...?
Thanks in advance for some facts on this
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