Hi Fran's,
I expect the pressure in the aft fuselage might be more representative than
cockpit
pressure, which is why my plan was to pick it up back behind the baggage
bay, near the flap cross tube. I have wondered about plumbing a standby pitot
static to the cockpit, but have wondered if I can make it a split system static.
We have a similar system with multiple statics for the one system on bigger
aircraft, albeit they measure ambient, for obvious reasons.
These fittings do work well though in my superficial testing, and leak of static
---From the fitting is a bit of an irrelevance, since we are talking about more
a static equalization pressure tube more than anything. Believe it or not I have
this Nylaflow? Tubing, the hard walled opaque stuff from ACS, and it makes
an excellent push to fit. I am tempted to use the 3/8" OD inside a 3/8" ID
joiner,
and just push them together. Very un-aviation, but if you've ever done it,
you'll appreciate how hard they are to pull apart, and no vibration is going
to do it.
Regards
Tony Renshaw
Sent from my iPad
> On 12 May 2014, at 1:22 pm, Frans Veldman <frans@privatepilots.nl> wrote:
>
>
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>> On 05/12/2014 09:46 PM, Tony Renshaw wrote:
>> Gidday, I am considering how I will quick connect my pitot dynamic
>> and static tubes from my wing root to the fuselage and am
>> considering quick connects/disconnects.
>
> I use the ones in your picture, but not for quick disconnects. I think
> they are not really suitable for repeatable connections and they are
> sometimes difficult to let go.
>
>> In the process of this investigation, I have wondered whether I
>> could take a rear fuselage "internal" static pressure as well as
>> the pitot,
>
> I have a static tube connector in the instrument panel with a blocked
> piece of tubing in it. If I pull it out, I have static pressure from
> the cockpit (in parallel to the static port in the wing). This works
> very well. In fact, it works so well that I hardly see any difference
> if I take the blockage out. (And yes, my static port system is leak
> free). Unless I open one of the big vents in the door windows, then
> the static pressure goes way off. But of course cockpit pressure is
> very dependant on how tight your doors are, how much air leaks around
> the throttle, etc. In my case it just happens that the cockpit
> pressure is very neutral.
>
> Frans
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