Re: MD-88 Tail Cone (Delta)

From:         David Lednicer <dave@amiwest.com>
Organization: Analytical Methods, Inc.
Date:         04 Aug 96 16:44:58 
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William L. Thomas wrote:
>
> In <airliners.1996.1418@ohare.Chicago.COM> James Buongiovanni
> >     The Tail Cone of the DC-9/MD-80 aircraft ...
>
> Regarding the tail cones....I've noticed some like those on Alaskan
> Airlines are flattened wedges, others are actual cones. What is the
> advantage of one over another?

	The cones are on all DC-9s and MD-80s produced before sometime in
the mid to late 1980s.  At that point, Douglas switched over to the wedge
tail cones, which are worth about 1% drag in cruise.  You will note the
same switchover when Douglas went from producing the DC-10 to the MD-11.

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