ADF testing
I'm in the process of testing a new ADF installation. Certain countries still require this to be installed as a backup for IFR flight. I'm not old enough to have actually used ADF during normal operations, so I have some questions. What is the best accuracy one can expect from ADF? How much needle movement back and forth on a steady course (exactly towards the station for example) would be normal / acceptable (2-3 deg?)? How much error can / should one expect in a 15 bank turn? The error should be minimum at 0, 90, 180, 270 relative bearing, but what about the 45 deg positions (it is worse there). Some of the airplane's systems when turned on cause a larger error (up to 15 deg). Does anyone have experience on how to get rid of that? Any help is appreciated. The airplane is a single engine, 4-seat, low wing, fixed gear, with the antenna mounted under the fuselage, near the wing leading edges.