Re: Why do MD80's skid ?

Date:         10 Jul 97 17:46:13 
Organization: NTnet News Server
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On 1997 0-04-15 said:
 gf>In article <airliners.1997.907@ohare.Chicago.COM>, Jan-Erik Andelin
 gf><> wrote:
 gf>> What is the technical/operational reason for so many
 gf>> (old ?) MD80's doing runway skids these days ?
 gf>I am not sure that this is technically correct, however it is well
 gf>known amongst maintenance crews that taxi MD80s, the MD80 is
 gf>notoriously light on it's small nose gear especially with a light
 gf>fuel load. Additionally due to the geometry of the nose gear only
 gf>one of those small tires is in contact with the ground in a sharp
 gf>turn. In fact mechanics can change a nose gear tire without jacking
 gf>the nose gear, all they have to due is put a turn on the tiller. So
 gf>add together small footprint in contact with the ground, a light
 gf>load and slippery runways. There may be other factors, but these
 gf>are the ones I am aware of.

Mechanics taxiing an empty MD80 are moving the aircraft when it is most tail
heavy.  An aircraft with engines on the tail is tail heavy empty and nose
heavy full.

Jim Cameron
Rankin Inlet, Nunavut, Canada

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