Fly Away Simulation
Your #1 Source for Flight Simulators!

Search for Downloads

Use this form to search for downloads and addons including aircraft, scenery and more.

Search entire site

Use this form to perform a site-wide search for forum posts, news and reviews and videos.

SearchSearch 

Back course button on 747-400

   
Author Message
wingman747
Trainee
Trainee

Pro Member

Joined: May 02, 2010
Posts: 23
Location: ERBIL IRAQ
Posted: Sat May 15, 2010 9:41 am 

Hi guys

can someone tell me what the bc(back course ) button actually does.... Question
Back to top
RadarMan
Chief Captain
Chief Captain

Pro Member

Joined: Aug 25, 2003
Posts: 19170
Location: U.S.A
Posted: Sat May 15, 2010 4:23 pm 

This is all I can find.

The BC means the Back Course hold and it is for runways that have ILS on only one of the sides....example rwy 34 has ILS but 16 doesn't. Well if you would just enter the 160 to be the course it wouldn't enough....not for the AP because then the needle would be mirored...and that would make bannanas with autopilot. So you are too left and the neddle shows you are to right, the ap goes left because the AP only sees where the needle goes. So it would be an endless attempt to go right by turning left. The BC only fixes that problem...so that when approaching fromt he other direction you can use the ILS at least for lateral navigation.

*****************************

The Localizer Back Course

"...the localizer antenna array is located at the far end of the runway, away from the approaching aircraft. Its antennas are arranged and manufactured in such a way to transmit a narrow signal on the runway approach path. That localizer signal is so accurate that with its guidance, along with the glide slope signal, an aircraft can safely land when the visibility is zero and when the ceiling is zero.




However, the Localizer antenna array also radiates a narrow signal beam in the opposite direction of the approach path. That signal is called the Localizer Back Course."



I took this as is, not my words.

Radar

Back to top
wingman747
Trainee
Trainee

Pro Member

Joined: May 02, 2010
Posts: 23
Location: ERBIL IRAQ
Posted: Sun May 16, 2010 7:02 am 

Thanks RADARMAN
Back to top
   
All times are GMT

Page 1 of 1
You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Related Topics

Sign-Up

Signing-up for a Pro account gives you super fast uncapped speed to the thousands of FSX, FS2004 & X-Plane downloads which include aircraft, scenery and more - click here to view the library for free or...

Go Pro
Sign-Up Now

Subscribe to our Free Newsletter

Join over 130,000 subscribers of our free dedicated flight simulation newsletter. Featuring new downloads, products and industry news.

 

Survey

Have you downloaded your copy of Microsoft Flight Simulator X: Steam Edition?


Votes 15439

Social

Follow us on Social Networks

Subscribe to our newsletter

 
RSS Feed iPhone App

Terms & Privacy Policy | Contact Us

Copyright © 2018 Fly Away Simulation. All Rights Reserved.