Jeremy Furtek wrote:
>
> (snip)
> > A simple way to
> > get static pressure is the way many full size light A/C do.
> >
> > Ram air pressure is a tube pointing straight forward outside
> > of the propeller wash. From a wing for example)  Static is
> > a tube in parallel to the RAM air tube with the end capped
> > and 3 or 4 small holes drilled in its sides. Both the tubes
> > and the hole sizes are non critical.
> >
> > w..
>
> There is an interesting study about pitot-static tube location relative to
> the flow around a wing here:
>
> http://naca.larc.nasa.gov/reports/1936/naca-tn-561/
>
> It would seem, from the diagrams in the report, that naive placement of the
> tube could result in sizable errors.

Airspeed in may A/C is notoriously flawed what is more important
is repeatable results. Fundamental science is interesting the
reference cited was dated March 1936.

w..

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu