REFLECTOR: Dimple Tape

[Dennis Martin]

Jim Hendrix (Standard Cirrus) posted some impressive research online. They
did some wind tunnel sims, oil flow tests, and a practical study using a
winglet mounted on a truck. My conclusion: Prop tests would be easiest to
validate. Dimples may work on wings and fuselage, but based on Hendrix
research, Velocities will require some serious testing and experimentation
on each model. That translates to lots of spare time. I vote for you guys
with finished Vs. Here's the Hendrix research:
http://www.standardcirrus.org/Turbulators.html

Have fun testing,
Dennis

On Sun, Aug 2, 2009 at 4:49 PM, Keith Hallsten <KeithHallsten at quiknet.com>wrote:

> Rene',
>
> I would be surprised if you see any measurable difference in performance
> with any sort of turbulator so far aft on the fuselage.  The boundary layer
> should be thicker by that point than the height of any turbulator tape.
> It's unlikely to do any harm, so your could try it and see; report back
> here!
>
> Keith Hallsten
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Rene Dugas
> Sent: Sunday, August 02, 2009 10:29 AM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Dimple Tape
>
> Thanks Dave,
> I'm considering placement near rear of cowling to trip the vacuum a
> little as the cowls converge between the oval exit and the spinner.
> Critique?  Ideas?
>
> Rene' Dugas
> Sent from my iPhone 3G
>
> On Aug 1, 2009, at 2:50 PM, Dave Philipsen <velocity at davebiz.com> wrote:
>
> > Rene Dugas wrote:
> >> I have not tried it but was wondering what the zig zag tape I saw
> >> on some planes was called and where to get it.
> >>
> >> Rene' Dugas
> >> Sent from my iPhone 3G
> > The zigzag tape is called just that.  It's very well known to glider
> > enthusiasts.  See this link:
> http://www.eglider.org/index.php?act=viewProd&productId=356
> >  <http://www.eglider.org/index.php?act=viewProd&productId=356>
> >
> > Dave Philipsen
> > Velocity STD FG
> > N83DP
> >
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-- 
All the best,
Dennis
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