Originally Posted by Say again s l o w l y
There is no way that you can couple an autopilot in both VNAV and LNAV with current systems such as the G1000, something that shouldn't be too difficult, but seemingly ignorned.
The new integrated GFC700 autopilot can control rate of climb. It's included with the G1000 in Columbias and the G58 Baron, but not yet in the Diamond DA40 or DA42.