Re: Airbus Gust-Load Alleviation systems

From:         gfoley@freenet.columbus.oh.us (Gerard Foley)
Organization: The Greater Columbus FreeNet
Date:         07 Sep 96 17:09:14 
References:   1 2
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Leo Kok (t43583@dax.dehavilland.ca) wrote:
: interesting side bar:

: In a paper presented at the International Committee on Aircraft Fatigue
: (ICAF) 1987 Ottawa Canada, Ian Gray from Bae Filton presented "Fatigue
: Crack Propagation Test Programme for the A320 Wing".  Showed that the
: flight was more comfortable for the PAX, but the cracks grew faster with
: gust alleviation on over crack rates with gust alleviation off.  If you
: don't get the gust overloads, you don't get the faigue life!

   Fatigue failure is a function of applied stress and number of cycles.
A reduced life would indicate the stresses are higher with the gust
alleviation.

Retired fatigue tester.

--
Gerry