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

AF1 at Daytona

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

AF1 at Daytona

Thread Tools
 
Search this Thread
 
Old 16th Feb 2020, 21:48
  #1 (permalink)  
Thread Starter
 
Join Date: Aug 2001
Location: Greater Aldergrove
Age: 53
Posts: 851
Received 0 Likes on 0 Posts
AF1 at Daytona

Folks, just watching this video of AF1 touching down at Daytona. At about 1:07, on touchdown, the outboard port gear seems to skip forward and then rebound as all four wheels finally touch...the flaps immediately behind also seem to bounce fairly heavily. This despite what looks like a benign touchdown.


I'm guessing this has to be 'normal', but it does look fairly significant (appreciating that gear can take a lot more punishment than this if required).

Any thoughts?

tdracer might be able to share some expertise?
NWSRG is offline  
Old 16th Feb 2020, 22:56
  #2 (permalink)  
 
Join Date: Jan 2008
Location: Denver
Posts: 1,226
Received 14 Likes on 8 Posts
As to the flaps - the 747 flaps do wobble quite a lot, in all kinds of conditions. The inner tips are hanging out there about 10 feet from the nearest "visible means of support" (the inboard flap track).

The #1 wheel on the port bogie looks to me as though its brake might have been locked - or at least sticky. That may have produced enough brief asymmetrical force or torque on the main strut to produce that wobble. Or there may also be a shimmy damper, torque link or whatever in need of service.

I'll always bow to tdracer - although I think his speciality is powerplants.
pattern_is_full is offline  
Old 17th Feb 2020, 03:57
  #3 (permalink)  
 
Join Date: Jul 2013
Location: Everett, WA
Age: 68
Posts: 4,425
Received 180 Likes on 88 Posts
As pattern notes, I'm a powerplant guy, and while I'm knowledgeable about the current AF1 aircraft (I worked on both of them), landing gear and flaps are out of my expertise.
Sorry...
tdracer is online now  
Old 17th Feb 2020, 06:13
  #4 (permalink)  
 
Join Date: Sep 2016
Location: Singapore
Posts: 50
Likes: 0
Received 1 Like on 1 Post
It definitely looks like a bit of a brake problem on that left-wing gear, the rear wheels touch down and do not spin up (well left one doesn't).

It is not until the whole truck is on the ground that the wheels spin up hence the judder on the gear. Maybe an auto brake/antiskid issue.
Station Zero is offline  
Old 17th Feb 2020, 11:33
  #5 (permalink)  
Thread Starter
 
Join Date: Aug 2001
Location: Greater Aldergrove
Age: 53
Posts: 851
Received 0 Likes on 0 Posts
Thanks folks...appreciate your replies. As an amateur, I thought I might have been asking a stupid question, but it didn't quite look right.
NWSRG 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



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.