Posts: 3936
Joined: Fri Jul 13, 2001 5:20 pm


Sat Aug 11, 2001 1:45 am

How do pilots know when they turn out on the runway and is about to to start for T/O that the aircrafts nosegear is in line with the aircraft? Is it centered by itself, and what does this?
When in doubt, flat out!

RE: Nosegear

Sat Aug 11, 2001 2:10 am

How do you know in a car?
Mr Spaceman
Posts: 2723
Joined: Thu Mar 15, 2001 5:09 am

RE: Nosegear

Sat Aug 11, 2001 2:51 am

Hi sudden.

I'm not an airline pilot, however just like Iainhol and I have to do when taxiing a small aircraft into position on the runway, I'm sure the Big guys just simply roll the aircraft forward a few feet along the center line untill she looks straight.

General Aviation pilots use rudder pedals to steer with while taxiing, and airliners use a small "Tiller" wheel (steering wheel) to steer. This tiller wheel is located on the left seat pilot's left side pannel.

Who knows...maybe these small tiller wheels are marked, to indicate to the pilot when the nosewheels are pointed straight. However, that won't nessesarily mean that the aircraft is.

Chris  Smile
"Just a minute while I re-invent myself"
Posts: 1517
Joined: Sat Jul 21, 2001 6:53 am

RE: Nosegear

Sat Aug 11, 2001 3:18 am

You nailed it spaceman.
BMW - The Ultimate Driving Machine
Posts: 1665
Joined: Mon Dec 20, 1999 3:16 am

RE: Nosegear

Sat Aug 11, 2001 1:50 pm

Most tillers for N/W steeering have marks to indicate center...but, as the center position has a slight detent that can be felt when the metering valve is centered, whether by artificial feel ( "steer by wire" ) or the tactile feel of the metering valve through cable runs. The N/W steering will tend to try to center anyhow when the tiller is let go...although the speed and load on the nosegear can affect how good or fast it does self-center. The way we were taught to judge the centerline of a taxiway is to "put your a$$ squarely over the line". It works.
Posts: 698
Joined: Sun Oct 29, 2000 9:36 am

RE: Nosegear

Sat Aug 11, 2001 2:39 pm

Pilots don't always know weather the nosegear is centered... see this pic...
Click for large version
Click here for full size photo!

Photo © Craig Murray

He landed with the nosegear off-center
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

RE: Nosegear

Sat Aug 11, 2001 5:45 pm

Just to name two aircraft...The Dimond Katana and the Grumman Tiger series the nosewheel is free-castoring, it will center itself.
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: Nosegear

Mon Aug 13, 2001 11:09 am


When transport catergory aircraft such as the 747 pictured in you post extends the gear it is already centered. There is a self centering cam internal to nose gear strut designed to bring the lower strut/piston assy. in line with the centerline of the aircraft. Wjat you are probably witnessing in the picture is a crosswind landing in which the pilot has not yet fully corrected for by the time the nose gear hit the runway.

Just as a note, there is limited nose wheel steering capability built into the rudder pedals (typically 7 degrees either side of center) for high speed usage.

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