View Full Version : Tilted wheels
10-12-2001, 11:10 AM
A new question. Why is it on the 747 and most other aircraft
the wheels are tilted in this direction (\) like normal.
but when it comes to the 767-400 the wheels are tilted in the
other direction (/). i can't figure out why boeing would do this to thier 767 can you.
10-12-2001, 04:59 PM
I don't really know, but I noticed that the Tu-154 has the same thing. However, one guy in the airliners.net chat room said that it might be because they fit inside the gear well better, but that doesn't seem too likely.
Here are some pics for people who don't quite understand quite what is being asked... From airliners.net- hope no one sues me :). They are 50% orig. size to allow easier viewing and quicker download time.
10-12-2001, 06:22 PM
If the aircraft has a slightly pronounced flare, perhaps that will serve to get all the wheels on the ground faster than making them hinge down?
Just a theory.
10-12-2001, 08:06 PM
For the 767-300, it's packageing inside the wheel-wells.
10-12-2001, 08:45 PM
Maybe for weight... notice how the B747 and B777 have the same thing for the landing gears!
10-14-2001, 12:29 AM
Well in response to the person who asked what are those wheels that tilt up. They are called Tilting bogies and what they are used for is , well , probably when a 747,777,or MD-11 touches down,can you imagine how much weight is carried,so they use the wheels when you flare to make a smoother landing , to grip the runway a little better,and also when you takeoff, the wheels rotate to that position ,pretty neat new feature on the new planes
Hope that cleared some questions up :-wave
10-14-2001, 09:32 AM
OK, question for ya all:
Why does the 777's bogies tilt foreward, when the 767 tilts backwards?
"Ladies and Gentelmen, we just discovered an exception to the rule that what goes up must come down, the landing gear"
10-14-2001, 03:12 PM
LAST EDITED ON Oct-14-01 AT 03:17PM (EDT)[p]I'm no expert, but I think that the 767 whells would be flat on the ground after the flare. So, when the plane flares, the gear are flat on the ground. This is just a guess, but who knows.
10-14-2001, 05:30 PM
LAST EDITED ON Oct-14-01 AT 05:31PM (EDT)[p]its actualy quite simple really.... it depends on on how each planes gear is rigged. The bogieshave a pivot point between the front and rear axle's. if the mounting point is a little forward of the center of gravity of the bogie (747,777) it tilts up, if its aft of the center they tilt down (767). thats all there is to it. :-)
10-16-2001, 08:38 PM
Sorry to say that your wrong on this but this is a quote from Boeing i have found....."Actuators tilt the main gear trucks about 13* up when extended for landing and after take-off and 5* down during gear retraction for storage in the wheel wells" (refering to the 777)
E-Mail me @ email@example.com if you want to know where i got the quote from (i would post it but im not sure about copyright laws)
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.