v0.1.3 AP Problems
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Hi,
seems there is something wrong the AP:
- AP captures selected Altitude 100-200 feet off (+/-).
- Descent: Aircraft goes wild:
Altitude selected and armed, Ap sync mode, Aircraft trimmed to 2000 feet/min Sinkrate - AP Hold is still engaged - Ap sync Mode off - the Aicraft ist climbing to the previous Altitude.
Workaround: Manually disangage ALT before Fligtlevelchange
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@el_barto said in v0.1.3 AP Problems:
Hi,
seems there is something wrong the AP:
- AP captures selected Altitude 100-200 feet off (+/-).
<snip>
Concur. This behaviour was not present in 0.12 but experienced every flight in 0.1.3
Bug introduced. Also I should mention that the altitude capture event is very abrupt, bordering on violent, which introduces some porpoising before settling at the incorrect altitude. -
@martyn I have noticed an issue on two flights now, when I am descending with VS and want to slow down (eg 250 -> 200 knots), the aircraft doesn't slow down but rather nose dives harder to maintain the speed it is currently doing (2000fpm -> 4000fpm, and staying at 250 knots), it feels like its confusing VS for IAS somehow.
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@the-sledge I like you too :-)
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@martyn Moving throttles back to near idle to maintain ~60% N2 (with DESC set on the TMS), and using SYNC mode to set VS. Previously I still had to use the speed brake a little bit to maintain 250 knot descent, otherwise it'd speed up a bit over time.
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@martyn I'm encountering a possibly related issue in descent, using version 0.1.4. So far I have only been able to reproduce it when descending by more than 1000ft from the previously held altitude.
Steps to reproduce:
- Starting in ALT HOLD at 7000ft, LNAV, AP on
- Set ALT SEL to 2900ft, select ALT ARM => The horn sounds (not sure if that's supposed to happen)
- Status as shown by the annunciators is now: ALT HOLD (green), ALT HOLD armed (white).
- Select IAS, reduce thrust to idle (TMS set to DESC mode).
- About 400-500ft above the selected altitude, the aircraft will start to level off, reducing the descent rate to only about 200ft/m. IAS annunciator is still green, ALT annunciator is still white, but Airspeed starts to reduce rapidly. Adding thrust to keep airspeed at the desired value will cause the plane to keep a rate of descent of only about 50ft/m, while still indicating IAS green, ALT white.
- My current workaround when this occurs: Selecting VS mode, pitching down using SYNC, the AP will capture the selected Altitude as desired.
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@martyn Tried it again today. Twice it worked perfectly. The third time it again went all haywire. At 22000feet, I set the target altitude to 16000feet and armed it, set VS mode, followed by SYNC switch (TOGGLE AFTERBURNER mapped to a switch on a keyboard), then set pitch down 1500feet/min. As soon as I pressed SYNC switch again, the vertical speed shot right up to +1500feet/min or more, then settled back down to zero. I tried this a number of times, then had to turn off the AP and hand-fly it down.
Guess I will submit a support ticket like you suggested.
