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- From: rjr@cupertino.Eng.Sun.COM (Bob Rocchetti)
- Newsgroups: sci.space
- Subject: Re: Mach 8+ Space/Spy Plane?
- Date: 18 Dec 1992 19:43:34 GMT
- Organization: Sun Microsystems
- Lines: 22
- Distribution: world
- Message-ID: <lj4af6INN97@exodus.Eng.Sun.COM>
- References: <1992Dec18.053917.12920@hparc0.aus.hp.com>
- Reply-To: rjr@cupertino.Eng.Sun.COM
- NNTP-Posting-Host: cupertino
-
- >Popular Science magazine had a photograph of a "mysterious" contrail that
- >looks like -+-+-+-+-+-+, and very thin compared to other trans-sonics.
- >This was ?September 1992 (this year anyway)
-
- I've seen this contrail. It was on a north/south track out over the ocean
- west and south of San Fransico, approx. August 1992. The trail was well above
- and further out to sea than the normal air traffic pattern that runs along the
- west coast of the US. The regularity of the pattern is what really stuck in
- my mind.
-
- At the time I thought it was the contrail from a Nasa modified U2 that
- flies out of Moffet Field near San Jose. The altitude seemed reasonable
- for a U2. The contrail was relatively close to a U2 base. The pulse pattern
- is the only thing I can't explain.
-
- Are there any known jet engines (military or commercial) that produce
- a regularly pulsed contrail at high altitudes? Could the pulsing just be
- the result of a fuel saving modification to an old U2 engine?
- ---
- Sun Technology Enterprises. - SunPics Printer Imaging Group
- bob.rocchetti@sun.com - (415) 336-7541
-
-