Mr Spaceman
Topic Author
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What's An A340's Nosegear Turning Limit?

Fri Feb 13, 2004 9:39 am

Hi guys.

I know the turning limits of many airliners has been discussed here in the past, but I did a search for the answer to this A340 question and had no luck.

So, because the photo below of an A340-642 is begging me to ask ..........

What is the turning limits for an A340-6's nosegear?

The nosegear on the A340 in the photo looks like it's being cranked around pretty far. It looks like it's turned 90 degrees to the left!  Wow!


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Photo © Andreas Müller



Chris  Smile
"Just a minute while I re-invent myself"
 
QantasA332
Posts: 1473
Joined: Sat Dec 13, 2003 5:47 pm

RE: What's An A340's Nosegear Turning Limit?

Fri Feb 13, 2004 9:57 am

I could very well be +/- 90 degrees. This probably doesn't help, but other aircraft nose wheel limits are:

737: +/- 75 degrees
DC-8: +/- 74.5 degrees
DC-9: +/- 80 degrees
767: +/- 65 degrees

Cheers,
QantasA332
 
Mr Spaceman
Topic Author
Posts: 2723
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RE: What's An A340's Nosegear Turning Limit?

Fri Feb 13, 2004 10:12 am

Hello QantasA332.

Sure, I think the info you provided helps because it shows a DC-9 with a limit of +/- 80, so it's not unlikely that this Airbus's nosegear is turned that far at least.

Even though it's nosegear looks like it's turned 90 degrees, it's probably less than that.

I do have one question however, about the limits you listed. Why are they shown as +/- limits, and not as set limits? Is there a tolerance built in to protect the nosegear incase a tug driver accidently turns the gear a few degrees past the posted limit?

I'm not nick-picking, I'm just wondering. Big grin

Chris  Smile
"Just a minute while I re-invent myself"
 
QantasA332
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Joined: Sat Dec 13, 2003 5:47 pm

RE: What's An A340's Nosegear Turning Limit?

Fri Feb 13, 2004 10:14 am

I do have one question however, about the limits you listed. Why are they shown as +/- limits, and not as set limits? Is there a tolerance built in to protect the nosegear incase a tug driver accidently turns the gear a few degrees past the posted limit?

I don't know the exact answer but yes, I think the limits definitely have a bit of a buffer in case of "over-angling"...

Cheers,
QantasA332
 
bio15
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RE: What's An A340's Nosegear Turning Limit?

Fri Feb 13, 2004 10:26 am

Tell me if I'm wrong, but I think the +/- means from -xx degrees to +xx degrees. I am sure there is a small tolerance, but it is probably very small (not mentionable) - especially considering that the deflection angle is given to a precision of .5 degrees which is real small-. This is just a guess though, let the experts reveal the truth  Smile

-Alfredo
 
flysab
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RE: What's An A340's Nosegear Turning Limit?

Sat Feb 14, 2004 12:25 am

For A340-200 and -300, and for A330, the angle of deflection is 72° each side.
This gives a turning radius of 44 meters to make a 180° for the A330-200.

For A340-500 and -600 I do not know.
 
VC-10
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RE: What's An A340's Nosegear Turning Limit?

Sat Feb 14, 2004 2:03 am

A346 max steering angle is +/- 75 degrees. The +/- isn't a tolerance but means 75 degs left(+) and 75 degs right(-)
 
Mr Spaceman
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RE: What's An A340's Nosegear Turning Limit?

Sat Feb 14, 2004 9:33 am

Hi guys.

Thank You, for your information.

> VC-10, Thanks for your specific info about the A346's steering limit and the clarification that the +/- means 75 degrees to the left or right.

The nose gear on the A346 in the photo must be turned all the way to it's 75 degrees limit because it looks like it's turned to almost 90 degrees! Must be an illusion. Big grin

Chris  Smile
"Just a minute while I re-invent myself"

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