I fly mostly in the city of Philadelphia and was just curious if others who fly in big/bigger cities have tips or notes about flying in the cities as opposed to suburban rural areas. For me I found after trial and error (painful) that I have to calibrate my compass every time I take off in the city (even if only a few blocks apart) because of so much interference and even when everything looks fine then take off and hover very low for a little bit to make sure everything is in fact working properly. There were instances when my P3A would say everything is great for takeoff, compass calibrated and as soon as I take off starts flying all sorts of whack. Basically compass numbers should be around 1500 +/- 100 for my P3P to work well in the city, I've had it acting weird at around 1250 and 1800s.
Anything you guys have to share?
Anything you guys have to share?