Re: Dumb Douglas: nee - DC-8s in service; no 707s?

Date:         09 Mar 97 12:39:34 
From:         Steve Lacker <>
Organization: applied research laboratories
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Filip De Vos wrote:
> : Douglas killed the DC-8 to launch the DC-10.
> Was the CFM allready in the works then? I remember reading in a story
> about SPANTAX, a Spanish charter airline, that they were planning to
> re-fan their Super sixties, should the offer be made, but I think that
> was with the JTD8? Memory is tenuous.

Yes it was... an interesting fact I recently read about the CFM-56
series (in 'Encyclopedia of Aero Engines' by Gunston). Gunston says that
the CFM 56 existed for nearly 10 years before it really caught on. If I
remember right, CFMI was formed around 1970 or a little before,  the
basic engine first ran in the early 70's, but didn't sell in large
numbers until the 737-300 in '81 (all dates may be off by a couple of
years... I read the chapter on CFMI, thought 'hmmm, interesting' and
then never re-read it). As for re-fanning with JT8D's, I think that all
the JT8-D series engines prior to the -200 had about the same thrust or
less than a JT4 turbojet, and definitely LESS than the JT3D turbofan...
in other words, 'not much of an upgrade' in terms of performance,
although noise and efficiency would improve. I do wonder why the CFM-56
is the upgrade of choice now instead of the JT8D-200. I guess the answer
is 'its been done and certificated.'

On a different subject, but one that started from this thread....
You mentioned SPANTAX... Were they not the last airline to operate the
Convair CV-990 Coronado? It certainly gets my vote as one of the
'sexiest airliners' of all time, even if it was a total failure in the
marketplace. And it had some sexy engineering features too... like the
clever aft-fan development of the GE J-79 engine. Plus, the only
airliner with a higher cruise speed than the Coronado is the Concorde.
Does anyone know if Coronados are still flying anywhere? I remember
being shocked when I saw one at Ft. Lauderdale/Hollywood Intl. about 6
years ago. I wondered what it was doing there at first, but soon found
out. It was being broken up for scrap... it left in small pieces.

Stephen Lacker
Applied Research Laboratories, The University of Texas at Austin
PO Box 8029, Austin TX 78713-8029