Date: Thu, 22 Aug 2002 15:52:50 -0700
Reply-To: Sean Garrett <SEAN.GARRETT@ASU.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Sean Garrett <SEAN.GARRETT@ASU.EDU>
Subject: DARE RE: Custom Scoop Update - Should you care!
Content-Type: text/plain; charset="iso-8859-1"
Hardee har har... I dare someone to undertake this endeavor on the simplest
of terms. Yarn strips and photos from a car driving alongside at 35 mph and
60 mph. !!!!
I would do it if someone gives me some scoops that will fit my 1981 (metal
vents).
The results should settle the debate !!!
Sean Garrett
1981 Westy (his)
1995 Eurovan Camper (hers)
sean.garrett@asu.edu
> -----Original Message-----
> From: Clive Smith [mailto:clive.harman-smith@NTLWORLD.COM]
> Sent: Thursday, August 22, 2002 3:29 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Custom Scoop Update - Should you care!
>
>
> Alistair,
>
> Just be aware that as :
> a) Water has a different visosity than air;
> b) the Reynolds No. (non-dimensional number controlling viscous flow
> behaviour)
> of a model in water bears no relation to that of a full
> sized vehicle in
> air -
>
> ------- you are unlikley to come to any useful conclusions
> using your flume
> tunnel.
>
> However, tufting your van and using mirrors or a camera to
> observe the flow
> might
> be more worthwhile- but your conclusions from what you see -
> again - might
> not.
>
> Regards,
>
> Clive
> '88 Syncro Transporter
> ----- Original Message -----
> From: "Alistair Bell" <albell@UVIC.CA>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, August 22, 2002 6:37 PM
> Subject: Re: Custom Scoop Update - Should you care!
>
>
> > Regarding scoops laminar flow and slipstreams etc
> >
> > I have to say form the limited experience I have had this
> summer building
> > and testing a research flume (sort of like a air tunnel but
> using water
> > instead of air), fluid dynamics is (for those of us limited
> in math and
> with
> > no access to super computers) very much an empirical practice.
> >
> > While you can look at a model/set up and make some
> predictions as how the
> > fluid will flow around/through it, often it will be very
> surprising to see
> > the flow in reality.
> >
> > Time restraints will probably preclude this but I want to
> build my Revell
> > Vanagon model and stick it in the flume to watch the flow around it!
> >
> > Years ago the list was discussing flow around the van etc,
> all kinds of
> > crazy and neat ideas surfaced. I had the idea of sticking
> little yarn
> > "tell-tales" (tell-tails?) all over the van then driving at
> various speeds
> > in still air and see (via chase van) just how the air
> flowed over the
> > shoebox.
> >
> > Alistair
> >
> >
> >
> > on 8/22/02 10:11 AM, 80 Westy Pokey wrote:
> >
> > > OK, I "Googled" and stole this from:
> > > http://www.aviation-history.com/theory/lam-flow.htm&e=653
> > > Then applied the principals to our Vans:
>
| 
