Schleicher pneumatic tube plumbing question

Tuno wrote:
9B,

I assume by now you've read my post describing the problem.

My 29 has 3mm OD (polyethylene?) tubing going from the fore end of the
area under the glare shield to under the seatpan. After reading yours
and GY's accounts, my guess is that the factory addressed the problem
my using the smaller polyethylene tubing for this part of the glider,
which does much better under heat and stress than the larger tubing.

It came from the factory with adapters that step the smaller tubing up
to the larger size, both under the seatpan and behind the instr panel.
They're just like the connections on my MH EDS controller, where you
depress a flat ring to disengage the inserted tubing.

I'd like to know the proper nomenclature for that tubing and adapter.

Glider is back home and flies great!

2NO


I think the fitting may be referred to as a "push fitting". Perhaps
because all you have to do is "push" the tubing into the fitting.

I'm sure youve already checked it but low ASI readings are often
caused by the triple probe being 1/4 inch short of fully home in the
socket.


On Sat, 6 Dec 2008 16:48:26 -0800 (PST), Tuno
wrote:

I've dispatched this question to the dealer and factory, but need to
troule-shoot quick so trolling here. I have a 2008 Schleicher ASG29
with confused instruments following some repair work.

My question is, in its factory configuration, are the three lines from
the multi-probe free of joints, splices or connectors all the way to
the instrument panel? (I'm sure this is the case for the TE and Ptot
lines, it's the static I'm curious about.)

I'm a little unclear about the total Pstatic implementation, with both
an E-Systems multi-probe and what appear to be static ports on the
fuselage a meter north of the rudder. Are the two combined?

~ted/2NO

ps the symptoms a varios appear to operate without TE compensation
and the ASI is not correct, mostly floating around 40-50% of what it
should be reading. Altitude readings correct on altimeter, 302 and
LX7007. The LX's vario's average always read 0.0, even when climbing
it what felt like very strong wave.

On Dec 9, 8:46*am, Basil wrote:
I'm sure youve already checked it but low ASI readings are *often
caused by the triple probe being 1/4 inch short of fully home in the
socket.

And I never saw a triple probe with an insertion depth marker. I just
push mine in until it stops, which is soon after the tip enters the
last O ring.

One other trap with these triple probes is excessive grease. They
need to be lubricated to prevent O ring wear but I found that, if just
a bit too much grease is used, it can close off the D section holes.
After being bitten by this once I make a point to check they are clear
each time I insert the probe.

Andy