From: "karel adams"


"Ron Natalie" schreef in bericht
om...

"Rob Turk" wrote in message
all.nl...
"Eric Miller" wrote in message
et...

Use a tee fitting just as you would for a static source; you only
need one
pitot system to supply two ASIs.


A problem (bug, dirt, ice) in the pitot would influence both ASI's.
Two
pitots makes sense if you install dual ASI for redundancy.

And two statics wouldn't be a bad idea either. On larger aircraft
the pilot and
copilot have independent static sources as well.

I've had two static system failures and one pitot failure over 25
years of flying.
All were the result of some foreign object lodged in the tubing (2 mud
daubers
and a gooey piece of something which we weren't quite sure what it
was).

I've also come out and found the static ports taped over after
maintenance.

In the "Instruments" chapter of my PPL ground school,
I was taught that many planes have two static ports
and a three-way valve to select between
"static" and "alternate static"

KA

On T-39s we had 4 static sources: 2 pilot and 2 copilot. One on each side was
an alternate and mounted in the nose wheel well. The select switches were
mounted on the lower outboard corners of the instrument panels.

Dan, U.S. Air Force, retired