Major A writes: > > - The autopilot in the 172 tries to keep the orange heading bug at the > > top of the directional gyro, period. If you set the DG to the true > > heading (as you would in the Arctic), then the autopilot uses true > > Ever flown a (real) 172 across the North Pole? :-)
No, but the Arctic starts a long way from the North Pole. Many people in Canada fly 172's in Northern Domestic Airspace (roughly north of 60, but it zigzags a lot), where you use true rather than magentic headings. The same may apply to parts of Alaska. > How about the HSI on the A4 panel? It appears to be fixed at true > heading, and it doesn't seem to be adjustable (it's supposed to be a > gyro, so it should be). I don't use the A4, so I haven't noticed. It should probably be showing magnetic heading. Usually, an HSI is slaved to a separate magnetic sensor that keeps it aligned, so that you don't have to adjust it manually (it's also very expensive, at least for a small plane). All the best, David -- David Megginson, [EMAIL PROTECTED], http://www.megginson.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel