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From: johndunk@wpi.WPI.EDU (John Dunkelberg)
Newsgroups: sci.military
Subject: YF-22 and YF-23 Engines
Message-ID: <1991Jun1.012505.27237@amd.com>
Date: 30 May 91 22:39:06 GMT
Sender: military@amd.com
Organization: Advanced Micro Devices, Inc.
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Approved: military@amd.com


From: johndunk@wpi.WPI.EDU (John Dunkelberg)


I was working at Pratt & Whitney during the competition, and was
interested enough to read PWA's news on the YF engines.

The Northup plane (YF-23) carried PWA engines originally, while the
first Lockheed carried GE.  There was a second plane of both airframes,
with the other engine.  These second models were more than a week
behind the first flights, and as such recieved much less publicity, but
the tests were done on both.

A big factor in the engine choice might be the maintenance systems. PWA
did a lot of work on expert system software so that faults and damage
could be found quickly and with a minimal of actual field tests.

-- 
John S Dunkelberg Jr.
johndunk@wpi.wpi.edu