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AN-124 Nose Wheel Steering  
User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Posted (9 years 3 months 3 weeks 3 days 1 hour ago) and read 2736 times:

Can anyone explain the AN124 Nose wheel steering,considering there are Two parallel nose wheels.Is there a ratio crank.How does the Steering mechanism work.Any pics.
regds
MEL


Think of the brighter side!
6 replies: All unread, jump to last
 
User currently offlineSovietjet From Bulgaria, joined Mar 2003, 2550 posts, RR: 17
Reply 1, posted (9 years 3 months 3 weeks 2 days 18 hours ago) and read 2596 times:
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They both turn at the same time. No ratio they both turn the same amount. It's the same with the An-225.


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User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 2, posted (9 years 3 months 3 weeks 2 days 8 hours ago) and read 2536 times:

Wouldn't that affect the steering & tire wear if they moved the same amount on a turn.
Shouldn't a Ratio be applied.
regds
MEL



Think of the brighter side!
User currently offlineEconoBoy From United Kingdom, joined Mar 2004, 157 posts, RR: 0
Reply 3, posted (9 years 3 months 3 weeks 2 days 7 hours ago) and read 2527 times:

It might cause some tyre scrub, but that's probably tiny compared with the wear caused by landing, and not worth the extra weight of a ratio device.

User currently offlineHAWK21M From India, joined Jan 2001, 31660 posts, RR: 56
Reply 4, posted (9 years 3 months 3 weeks 2 days 5 hours ago) and read 2505 times:

Quoting EconoBoy (Reply 3):
It might cause some tyre scrub, but that's probably tiny compared with the wear caused by landing, and not worth the extra weight of a ratio device.

I wonder why the A380 never considered the same type of Nose Gears.
regds
MEL



Think of the brighter side!
User currently offlineFredT From United Kingdom, joined Feb 2002, 2185 posts, RR: 26
Reply 5, posted (9 years 3 months 3 weeks 2 days 3 hours ago) and read 2496 times:

A ratio device doesn't really have to add any complexity. You have it in every car. The point is to have the axle of each wheel (or pair of wheels) pointed towards the same spot on a line through the main (rear) wheels.

A significant amount of the wear on aircraft tires comes from taxiing, which is one reason why it is not worth bothering to spin up the tyres prior to touch down.



I thought I was doing good trying to avoid those airport hotels... and look at me now.
User currently offlineEconoBoy From United Kingdom, joined Mar 2004, 157 posts, RR: 0
Reply 6, posted (9 years 3 months 3 weeks 2 days 1 hour ago) and read 2478 times:

I think the device used in cars is called an Ackerman linkage. It's very simple in a car, but harder to incorporate into a retractable undercarriage. Otherwise you could use software interpret the pilots commands and turn the nosewheels the right amount. Again, is it worth the hassle/cost?
Incidentally, the undercarriage used on the B52 is pretty interesting as all four carriages can be steered to allow crabbing in cross winds - there must have been some interlocking there to keep all the gear pointing in the same direction.


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