VS mode not working correctly
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Hi,
I’ve noticed a potential issue with the VS mode. After takeoff (around 2000ft AGL), I activate the VS mode and wait for the pitch to synchronize with the flight director bar before engaging the autopilot.
However, once I do this, the aircraft begins to behave erratically - pitching back to 0 degrees and then oscillating around the target vertical speed by approximately +/- 500ft/min.Are there any known bugs or issues with this behavior? I’ve already opened a support ticket 3 days ago, but I haven’t received any response yet.
Thank you very much for your help!
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Same here.
Not only during climb but regarding all vertical modes of the Autopilot in all stages of flight.
The Autopilot appears to react way too aggressively.Best regards
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Sadly sounds a bit like a re-run of this one on the 146: https://community.justflight.com/topic/6246/glideslope-problems/21
Effectively the AP in there runs into issues in (relatively) low-speed regimes. I've found it to calm down after manually stabilising the plane enough for the AP to only need small adjustments, i.e., only enable the AP into a properly trimmed out plane.
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Sounds like the VS mode might need some tuning.
In any case, it's more common to use LVL CHG after take-off.The SOP I follow generally goes like this for the RJ100:
350 ft AFE: AP - ON
350-800 ft AFE: Select roll mode (LNAV/HDG)
800 ft AFE: Select climb thrust & do after take-off items (Bleeds - Set, taxi-lights - ON, RWY exit lights - OFF)
1500 ft AFE: Accelerate to 210 knots
At VFTO: Select flaps zero.
When flaps are up: Set 250 knots and select LVL CHG.
