Good information, Alexander. That's exactly how I intend to use it.

I would like to have the same polar calculations in both as a backup so
I will spend my early time with the units getting the glide slopes and
speeds to fly to be as close together as I can. After that, it's all fun!

Dan

On 1/7/2015 11:46 AM, Alexander Müller wrote:
Dan, when you are not flying records or similar things then it is not necessary to declare a task in your logger. That´s right! But it is also not necessary to put waypoints or tasks into your CNv.
XCSoar will handle the whole database, the waypoints and the tasks.

Normally, you select your task (or create a new one with the task editor) and activate it and than XCSoar handles your flight.
It calculates and shows your course and distance. It calculates your glide path with the necessary information (Distance, Polar, Wind, Bugs, MC) and it is able to calculate the best McCready.

And that is the only point, where polar-data, weight and bugs are necessary in your XNv. XCSoar is able to send the calculated or also manually modified MC to the CNv to influence the speed and to stay optimized on your glide-path.
If the polar, bugs or the wingloading in your CNv is not correct, the speed command mode will give you the wrong speed to fly.

If you use waypoints or tasks in the CNv it is (normally) only a kind of backup, because all these calculations e.g. the course to avoid an restricted airspaces are just made in your (main) flight-computer (Dell with XCSoar).

I never used my 302 or CNv as a navigation device, only as a backup for homing.

--
Dan Marotta