Re: 767 Landing Gear

Date:         29 Apr 99 22:10:26 
From:         "John Vincent Lombardi" <uniphone@home.com>
Organization: UniPhone MP
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In article <airliners.1999.396@ohare.Chicago.COM> , Robert Johnson <rwjohnson@earthlink.net>  wrote:
>> I was wondering why the landing gear on the 767 is slanted forward and not
>> back like most other planes.  The two front wheels are lower (lots) than the
>> back and it seems even a big flare on landing would barly leave the tires
>> level.  Why is it only on the 767?  Two of the four main geas on the 747 are
>> extreme example of the opposite as the back tires droop alot.  Thanks for
>> any imput, I was just curious.

In case this question hasn't been answered:

The gear configuration on 767 was designed to maximize rear cargo hold
capacity. The gear retracts slightly forward, stowing the trucks as far
forward as possible. When retracted, the trucks are actually parallel with
the keel beam. This results in the strange toe down configuration (and also
makes the 767 very sensitive to the slightest crab at touchdown). The front
tires always contact the ground first and leave last.

The 777 has the same setup, but the trucks are hydraulically motored tail
down during extension. If you watch closely, you can see the trucks being
motored toe down during the retraction cycle.

Hope this helps,

John

--
John Vincent Lombardi               uniphone@home.com
San Francisco, CA             uniphone@compuserve.com