Re: B757 "Heavy Jet"?

From: (Dennis Jensen)
Organization: CSIRO
Date:         24 Jun 96 00:42:05 
References:   1
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In article <airliners.1996.946@ohare.Chicago.COM>, wrote:
>    Hello I was wondering if someone can help me understanding why the
>FAA decreed the 757 as a Heavy Jet.
>I know it fits the Cat. just by using its weight, but if I'm not
>mistaken that was not the reason behind the ruling.
>Thank you ...... Mooney1

It had to do with the 757 having far greater wake turbulence than would be
expected just using the weight. To the best of my knowledge, this phenomenon
is as yet unexplained.