Well google has done it again. It turns out that there is a “hidden” flight sim built right into google earth client. You’ll need version 4.0+ for this to work. Here is the info on how to activate it and a listing of navigation keys. The short of it:
To enter the flight simulator mode, press Ctrl + Alt + A (Command/Open Apple Key + Option + A on the Mac). Once you have entered flight simulator mode for the first time, you can re-enter the mode by choosing Tools > Enter Flight Simulator. To leave flight simulator mode, click Exit Flight Simulator in the top right corner or press Ctrl + Alt + A (Command/Open Apple Key+ Option + A on the Mac).
The following keystrokes control navigation and other aspects of the flight simulator. You can also control the aircraft with a mouse or joystick. To disable or enable mouse controls, left click (single click on a Mac). Once mouse controls are active, the pointer shape changes to a cross on your screen.