This shows the calculated range, automatically factoring fuel burn, wind speed, airspeed, ground speed, throttle/mixture settings, allowing you to fine tune RPM/Manifold pressure/mixture settings to get the range you need. Its oblong due to the wind direction and speed (you go further with a tailwind per gallon...) I cant even begin to explain how badass this is.

Owner caption March 2005 · Photo 396 of 990