Jump to content

Sign in to follow this  
Guest alexhn

Question about Autopilots

Recommended Posts

Guest alexhn

One thing about the autopilot, and that is, why are there two? CMD A and CMD B. I know vaguely that you enable CMD B as well for ILS landings or something but thats it.In addition, why are there two CWS. ie CWS A and CWS B. I know what they do but what is the purpose for having 2?

Share this post


Link to post
Guest Erups

>>what they do but what is the purpose for having 2?Redundancy.They constantly confront and exchange data to ensure the maximum precision.They correspond to two (both logically and phisically) different computers.

Share this post


Link to post
Guest hlm65

You'll engage both A/Ps ONLY when performing an autoland. As Claudio said, the purpose is redundancy/safety (required with the very strict accuracy requirements of an autoland): each a/p has its own separate computer; during an autoland with both APs engaged, they will compare there data and performance.The 2 CWS are there because you have 2 A/P computeres and there's a sperate CWS button for each AP.

Share this post


Link to post
Guest oldngray

... why are there two?In the real world a pilot cannot legally attempt an autoland unless both computers are operating properly.... 300 souls on board... if system "A" fails and there is no backup to take over seamlessly... does one want the aircraft to autoland without guidance?

Share this post


Link to post
Guest alexhn

thanks everyone so much for your replies :)now i understand the concept more

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    2%
    $640.00 of $25,000.00 Donate Now
×
×
  • Create New...