Ladies and Gents. I have a Hatz CB-1 with a compass in both the front and rear cockpit. Both are very erratic and inconsistent. One day they will be 10 degrees off, the next flight will be 20-30 degrees off - never correct. I've swung the compass' several times. I've replaced the rear compass. I've tried Magnetic Compass Shield. All without material improvement. The rear panel is pretty crowded but I've been able to reroute all electrical wires away from the compass. Mag switches are the only thing electrical in the front panel and the wires are not near the compass.
I occasionally fly a few hundred miles from home base. If my i phone ever dies (Foreflight) I could find things interesting. Also, my AI has been patient but would like to see an accurate compass. I've read about welded tube structures having a magnetic field introduced during fabrication. How long does that stay in the structure? My plane was built in late 90's. How do you determine if that's the case? How do you remove it? Any other suggestions?
Thanks for your ideas,
Dave
I occasionally fly a few hundred miles from home base. If my i phone ever dies (Foreflight) I could find things interesting. Also, my AI has been patient but would like to see an accurate compass. I've read about welded tube structures having a magnetic field introduced during fabrication. How long does that stay in the structure? My plane was built in late 90's. How do you determine if that's the case? How do you remove it? Any other suggestions?
Thanks for your ideas,
Dave
