Re: No. of wheels and runways

Date:         21 Nov 97 01:59:53 
From:         faurecm@halcyon.com (C. Marin Faure)
Organization: Northwest Nexus Inc.
References:   1
Followups:    1 2 3
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In article <airliners.1997.2659@ohare.Chicago.COM>, luisma@spainmail.com wrote:

> Does anybody know if there is any regulation stating that the
> weight-per-wheel is limited in aircrafts due to runways care? In other
> words, the reason for the modern aircrafts wear more wheels than older
> ones is the danger of wheel explosion or the runway strength?

The primary reason for the multiple-wheel trucks on the 777, the four main
gearsets on the 747, and the extra center gear on the A340 are to safely
distribute the weight of the planes on the world's existing taxiways and
runways without damaging the tarmac or concrete.  Using multiple wheels is
better than using a few really big wheels, as the smaller wheelsets are
easier to stow, plus there is some redundancy should a tire blow out on
takeoff, landing, or taxi.

C. Marin Faure
  author, Flying A Floatplane