REFLECTOR: Static port stuff

Scott Derrick scott at tnstaafl.net
Sun Mar 1 14:06:43 CST 2009


Kurt,

I used aluminum tape which is pretty thin, I used 3 layers..   About 1/2
inch wide.

ScottI



nmflyer1 at aol.com wrote:
> Thanks Scott,
>
> Where, and how thick of a trip strip did you end up using?
>
> Kurt
>
>
> -----Original Message-----
> From: Scott Derrick <scott at tnstaafl.net>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Sent: Sun, 1 Mar 2009 8:53 am
> Subject: Re: REFLECTOR: Static port stuff
>
> Kurt,
>
>      When I bought my plane it was built with the flush static port
> ahead of the pilot door. 
>
>     I think I was doing a low pass over the field at Grants, a few
> months after I had restored the plane that I noticed the altimeter was
> showing an altitude 400 ft above what it should!  I'm not sure where or
> who I got instructions on how to calibrate the port by raising the
> surface in front of or behind the hole depending on if the relative
> pressure was too low or too high.  But it certainly worked and seemed to
> work at all flight speeds, though I was most concerned about cruise
> speeds.  I was amazed at how much higher my pattern looked from the
> plane after I corrected the static port!
>
>     Be interesting to see a before and after test using one of the
> raised static disks as used on cessna's, etc...
>
> Scott
>
> nmflyer1 at aol.com <mailto:nmflyer1 at aol.com> wrote:
> > I'm curious about something. The plans for my V are basically that the
> > static hole is drilled right through the skin at a location just
> > forward of the left door. It doesn't say anything about using a "trip
> > strip" or a raised lip static disc like many are using. Could that be
> > part of the problem?
> >
> > What is the factory doing now?
> >
> > The raised lip of these static port discs is going to make a change in
> > how airflow flows over the port right?
> >
> > I purchased one of those static discs also, but then decided against
> > using it because of that lip. Right now I have the "stock" type
> > plumbed into the skin as per the plans, but have yet to drill the
> > actual holes until later. Would be interesting to know what the
> > factory is using as you would think that it would work (most of the
> > time).
> >
> > Kurt
> >
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