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Thread: AP-Pilot Altitude Loss in Turn

  1. #1

    AP-Pilot Altitude Loss in Turn

    Hi, I am losing Altitude in a turn and need advice. RV-8, AF PILOT with ARINC interface on my AFS5400.

    All settings for EFIS and AP are as recommended in AFS Manual.

    In a Left 90 degree turn I lose 40' then as it levels out it gains 40' then returns to altitude. Bank angle is 31 degrees
    In a Right 90 degree turn same thing, but 29 degrees of bank.

    ASP - 2.0 , ASI - 0.020 , ASD - 0.20

    ROLL - 0.05, LOC - 0.50 , ALT - 5.50 , GS - 3.00 , FD - 1.50

    I see the flight director respond quicker then the airplane. It seems the airplane lags a little and then I feel in the seat of my pants the airplane pulling up to get the altitude back, but it seems it needs more "pull" to keep it. Holding the stick I do not feel any slipping of the servo.

  2. #2
    Advanced Flight Systems Shawn McGinnis's Avatar
    Join Date
    Sep 2012
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    Canby, OR
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    638
    What does the AF-5000 show on the bottom of the CHECK page during turns?

    What are the settings for static lag in the Trutrak head?
    What version of software is the Trutrak running?
    Shawn McGinnis

    Advanced Flight Systems
    support@advanced-flight-systems.com

  3. #3
    Quote Originally Posted by Shawn McGinnis View Post
    What does the AF-5000 show on the bottom of the CHECK page during turns?

    What are the settings for static lag in the Trutrak head?
    What version of software is the Trutrak running?
    V2.53
    Static Lag = 2

    Bottom of check screen reads:
    Left turn -24 AP Roll and -120 APVSPD
    Right turn 24 AP Roll and 204 APVSPD
    Level 1.2 AP Roll and -120 APVSPD

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