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- Newsgroups: sci.aeronautics
- Path: sparky!uunet!caen!dlevy
- From: dlevy@viper.engin.umich.edu (David W Levy)
- Subject: Re: Vanes on F/A-18
- Message-ID: <#=V-HBB@engin.umich.edu>
- Date: Tue, 28 Jul 92 09:15:00 EDT
- Organization: University of Michigan Engineering, Ann Arbor
- References: <4592@balrog.ctron.com> <Bs225G.6AC@ecf.toronto.edu> <SHAFER.92Jul27101630@rigel.dfrf.nasa.gov>
- Originator: dlevy@viper.engin.umich.edu
- Nntp-Posting-Host: viper.engin.umich.edu
- Lines: 19
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- In article <SHAFER.92Jul27101630@rigel.dfrf.nasa.gov>, shafer@rigel.dfrf.nasa.gov (Mary Shafer) writes:
- > On 27 Jul 92 16:08:04 GMT, murty@ecf.toronto.edu (MURTY Hema Sandhyarani) said:
- >
- > MURTY> In article <4592@balrog.ctron.com> nyberg@ctron.com (Jason William Nyberg) writes:
- > >
- > >to and I have to say, it was incredible. Anyways, I noticed an addition
- > >to the upper surface of the wing fairing where the leading edge of the
- > >wing joins with it. It's about a foot long, squared off and unaerodynamic
- > >looking. I have never seen it before and it isn't in any book I have,
- > >and I was wondering what it is and when it was put there. It looks like
- > >it would interact with the vortex generated by the fairing at high AOA...
- > >but i'm guessing :)
- >
- > It's a vortex fence or strake, designed to keep the LEX vortex off the
- > vertical tail. They were having a buffet problem on the verticals
- > that was leading to a fatigue problem, so they came up with this fix.
- >
- I believe the LEX fence also delays vortex breakdown.
-