Autopilot Accuracy

[ElCaramba]

Correct me if I am wrong, but the Autopilot seems not to be too precise in terms of keeping speed and often altitude during climb and descent. During cruise it seems ok.

Example:

I found the speed to be off the AP Input by a couple of knots quite often. The airplane seems to be trailing behind the commanded speed. Also, during descent, I found myself being about 1.000 ft above the vertical profile, however the AP apparently descended with the calculated rate and kept that 1000ft deviation (until it eventually cought up at a alt constraint along the route) instead of trying to be precisely on the vertical profile and descending just a little faster to get back on the profile. As you can see in the picture below, the speed is not going anywhere although the plane is slightly slower than it should be.

Unless that’s for some reason the real world behavior, I guess that’s a AP bug. The Fenix for example is much more accurate in that regard, I assume that’s the way it should be.