More G1000 findings
Each flight with the G1000 avionics teaches me more about them. My most recent flight was no exception. This time I tested how the G1000 handles switching over to the alternate static air source. Static air pressure is used to determine altitude, air speed, and vertical speed in the airplane - when you switch to the alternate source (maybe because ice formed over the normal port , or it was otherwise clogged) you switch to reading the pressure of the air in the cabin of the airplane. This cabin air is at a slightly lower pressure than the outside air due to aerodynamic forces sucking air out of the tiny gaps in the cabin (around the doors, windows, and other places). So when you switch to the alternate source, the airplane thinks you are climbing momentarily. I wanted to see how the autopilot and the G1000 would react when this was done in flight. The first time I tried it I switched to the alternate source and saw the autopilot start to correct altitude as I expected. I quickly ...