On Aug 28, 7:05=A0pm, Neal Pfeiffer <nealpfeif...@[EMAIL PROTECTED]
> wrote:
> Like JJ said
>
> If you want to do it easy and perfectly adequate as well, install a
> nearly vertical tube ahead of the canopy near the bulkhead ahead of the
> instrument panel (above the static buttons on the side of the fuselage).
> =A0 I would suggest angling it slightly forward at the top so that the
> tube is about perpendicular to the upwash induced by the wing. =A0The
top
> of the tube could be about 6-8" outside the fuselage. =A0Plug the top
end
> and put the hole or holes or slots in the back of the tube as drirected
> from your favorite article by Oran Nicks' (Nicks tube) or Dick Johnson
> or <insert other favorite name here>. =A0The plumbing is short, easy to
> do, and will give a reading that is well compensated. =A0Our club Ka6CR
> has one like this and it works well.
>
> I would not suggest over the wing in the turtledeck, since it could
> require uncoupling and coupling the pressure tube with some regularity
> and it would be easy to damage when the turtledeck is off.
>
> The position on top of the fuselage near the trailing edge of the wing,
> however is not a bad one. =A0The flow around the wing is nearly back to
a
> freestream static condition at the trailing edge and the flow had better
> be attached while cruising or thermalling or there are other problems.
> If one flys slow enough to separate the flow there, the inboard wing is
> already stalled and that's flying too slow.
>
> ..... Neal
>
>
>
> JJ Sinclair wrote:
> > Eric wrote.......
>
> >>So, I'd suggest trying the very easiest thing first: a TE probe
mounted
> >>on the removable turtledeck, probably towards the rear it. If it
works,
> >>great; if not, very little effort wasted.
>
> > Yeah, what he said......................I used a vertical TE probe on
> > my Duster a hundred years ago and it worked as good as I did. If your
> > intimidated my the thought of drilling and stringing tubes, go the
> > easy way, it can be mounted forward of the canopy where there isn't
> > any interference with the wings. Wings & Wheels sells them and I
> > believe the top bent ****tion in set to be vertical with the ****p set
> > in flying position (W&B level)
> > JJ- Hide quoted text -
>
> - Show quoted text -
If objective is just simple installation, do what JJ says and put it
on the nose.
Putting it anywhere close to the flow field of the wing- that is
anywhere near the top, means that the local pressure
changes every time you change angle of attack. This is the reason why
it is on the fin on essentially all modern gliders.
UH
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