PPRuNe Forums - View Single Post - ils Localizer vs. mcp course selector
View Single Post
Old 11th June 2007 | 08:32
  #7 (permalink)  
BOAC
Per Ardua ad Astraeus
 
Joined: Mar 2000
Posts: 18,575
Likes: 4
From: UK
According to the Boeing Maintenance Manual, the A/P uses the selected CRS to refine its intercept calculations
- absolutely! If you have ever forgotten, like I have, to reset the ILS QDM after a hold and watched the a/p try to spear off into the bundu looking for a localiser, you will realise that. Leaving aside the appearance of the display, I guess that if one established on the Loc in heading select and then asked it to track the Loc it would, but I have not tried that. I have a suspicion that somewhere in the 'works' is an input bias of 'expected' track and that it might just fly an offset centreline, however.

We used to 'play' with the BAC Lightning ILS on the occasional 'offset' ILS beam and found that you could make the machine track down one edge of the cone and fly the centreline, but that was O L D technology
BOAC is offline  
Reply