Results 1 to 5 of 5

Thread: FLYING ILS with AFS AP

  1. #1
    Senior Member
    Join Date
    Mar 2010
    Location
    gilford, nh
    Posts
    319

    FLYING ILS with AFS AP

    Today I flew an ILS with the AP. It had about a 20 kt crosswind from the left. The autopilot wasn't able to compensate for the cross wind and my deviation bar remained off to the windward side yet when i flew a gps approach to the opposite runway with the same cross wind(from the right) my course was right on. Is there something different how the AP handles an ILS approach?
    Alan

  2. #2
    Yes, the GPS approach is a lot easier to control. With a GPS approach we always know where the plane I and how far away from center it is. The CDI needle on a gps approach is actually a distance. On a ILS the CDI needle is just a deflection and it gets a lot more sensitive as you get closer, it makes it difficult to control the gain for the control loop.

    You should try increasing the LOC gain on the EFIS to make it follow it bettter.
    Rob Hickman
    Advanced Flight Systems Inc.

  3. #3
    Senior Member
    Join Date
    Mar 2010
    Location
    gilford, nh
    Posts
    319
    Quote Originally Posted by Rob Hickman View Post
    Yes, the GPS approach is a lot easier to control. With a GPS approach we always know where the plane I and how far away from center it is. The CDI needle on a gps approach is actually a distance. On a ILS the CDI needle is just a deflection and it gets a lot more sensitive as you get closer, it makes it difficult to control the gain for the control loop.

    You should try increasing the LOC gain on the EFIS to make it follow it bettter.

    Rob,
    My current setting is .50. What number to you suggest?
    Alan

  4. #4
    just keep increasing it until it gets jumpy, .7 ?
    Rob Hickman
    Advanced Flight Systems Inc.

  5. #5
    Senior Member
    Join Date
    Mar 2010
    Location
    gilford, nh
    Posts
    319
    will try it.
    Alan

Similar Threads

  1. AOA Flying Tips
    By Rob Hickman in forum AOA Training Videos
    Replies: 4
    Last Post: 10-26-2018, 11:21 PM
  2. EFIS Training Video #1 Flying an ILS
    By Rob Hickman in forum EFIS Training Video's
    Replies: 6
    Last Post: 06-10-2014, 08:29 PM
  3. night flying
    By amekler in forum AF-3400s, AF-3500s, AF-4500s ... General Discussion
    Replies: 2
    Last Post: 10-27-2013, 03:53 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •