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- Xref: sparky rec.autos.tech:16704 rec.autos:29857
- Newsgroups: rec.autos.tech,rec.autos
- Path: sparky!uunet!noc.near.net!news.cs.brandeis.edu!chaos.cs.brandeis.edu!andyh
- From: andyh@chaos.cs.brandeis.edu (Andrew J. Huang)
- Subject: Re: Do SPOILERS Really Work???
- Message-ID: <1992Dec15.190305.13468@news.cs.brandeis.edu>
- Sender: news@news.cs.brandeis.edu (USENET News System)
- Organization: Brandeis University
- References: <1992Dec10.060531.18823@u.washington.edu> <winders-111292101708@macwinders.support.apple.com> <1gjln0INNkg3@usenet.INS.CWRU.Edu>
- Date: Tue, 15 Dec 1992 19:03:05 GMT
- Lines: 30
-
- In article <1gjln0INNkg3@usenet.INS.CWRU.Edu> aas7@po.CWRU.Edu (Andrew A. Spencer) writes:
- >
- >In a previous article, ssa7+@andrew.cmu.edu (Stefan E Sherwood) says:
- >
- >>rice-burning econo-box with no spoilers and get 50 mpg.
- >>
- >>Stefan
- >>
- >
- >ah..but SOME spoiler DO NOT increase downforce, but are created to ease the
- >DREW
-
- Drew is quite correct in this case. I just wish he would use
- paragraphs and sentences.
-
- In the early days of aerodynamic autos they put on long tails in the
- expectation that the smooth re-entry would reduce drag and increase
- high speeds. After a while a Dr. Kamm observed snowdrifts in a
- blizzard and noticed that the wave shape of a drift caused a vortex to
- its lee. Moreover the sum of the drift's shape and the vortex
- together made a very streamlined (lo drag) shape. Such vortices
- behind bluff bodies are now called Kamm vortices and the original
- cutoff rear ends with a little uplift were called Kamm-backs. The
- little uplift instigates a vortex and prevents a high-drag turbulent
- wake. I believe this was circa 1950.
-
- -andy
-
-
-
-