Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

DME Height Check

Tech Log The very best in practical technical discussion on the web

DME Height Check

Old 18th Mar 2014, 09:43
  #41 (permalink)  
 
Join Date: Mar 2002
Location: Seat 1A
Posts: 8,532
Received 72 Likes on 41 Posts
Underfire, the chart you posted isn't the same as the earlier one you posted. It has the FAF at 6.6 DME FJR (as Jepp says) and no profile check at the OM.
Capn Bloggs is offline  
Old 18th Mar 2014, 11:29
  #42 (permalink)  
 
Join Date: Jun 2001
Location: FNQ ... It's Permanent!
Posts: 4,281
Received 162 Likes on 83 Posts
Can't quite work out what most of this has got to do with the original post?
How are the DME Height's mentioned below the plan view calculated?
Capt Fathom is offline  
Old 20th Mar 2014, 08:22
  #43 (permalink)  
 
Join Date: Aug 2013
Location: PA
Age: 59
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
Bloggs,

You are correct. The second one I posted is the correct chart...sorry about that

Jepp has the FAF in the same location, the issue is the level segment past the FAF and different GPA.
underfire is offline  
Old 20th Mar 2014, 10:29
  #44 (permalink)  
 
Join Date: Mar 2002
Location: Seat 1A
Posts: 8,532
Received 72 Likes on 41 Posts
That's OK, UF. Really odd Jepp using 3.13°. The chart clearly shows 3° misses the FG step by 20ft.
Capn Bloggs is offline  
Old 21st Mar 2014, 22:20
  #45 (permalink)  
 
Join Date: Aug 2013
Location: PA
Age: 59
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
no worries...

What is ALT AD of 17? I note all of the altitudes have 17 added to them...
600 (583), 2000 (1983), etc..
underfire is offline  
Old 22nd Mar 2014, 04:28
  #46 (permalink)  
 
Join Date: Mar 2002
Location: Seat 1A
Posts: 8,532
Received 72 Likes on 41 Posts
What is ALT AD of 17? I note all of the altitudes have 17 added to them...
600 (583), 2000 (1983), etc..
Must be a French thing. Means Aerodrome Altitude 17ft. Threshold altitude is 6ft. The bracketed values are the "AAL" heights.
Capn Bloggs is offline  
Old 23rd Mar 2014, 05:41
  #47 (permalink)  
 
Join Date: Aug 2013
Location: PA
Age: 59
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
interesting, and yet the MDA (H) uses 20 feet

Its funny, they have all of this useless data on the chart, yet leave out TCH.
underfire is offline  
Old 27th Mar 2014, 10:44
  #48 (permalink)  
 
Join Date: Feb 2010
Location: Slovakia
Age: 65
Posts: 162
Likes: 0
Received 0 Likes on 0 Posts
For non-precision approaches the Tan 3° formula is OK for nominal altitudes.
However for Precision approaches the Earth curvature should be taken into account which will raise the nominal glide path altitudes depending on the distance away from the touch down point.
rennaps is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.