Backup vacuum systems

wrote:
Anyone have any experience with or comments about the manifold pressure
based standby vacuum system vs a separate electrical driven vacuum
pump? Other than the price difference. I want to install a backup and
am interested in getting some info.


Regards,
Jerry

I have the Precise Flight Manifold vacuum system backup in my Archer.

Installed in 1998.

Used once in 2001 in IMC at 6000 ft over AR. IT WORKED!
I had to throttle back some but no trouble holding altitude.
Talked to ATC and they called around to find a shop that could do the
repair.
Once on the ground you don't take off again.
Landed and left the next morning with a new Sigma Tek dry pump
Now have about 500 hrs on it with their recomended 1200 hr replacement.

Chuck

The Sporty's electric AI is STC'd for replacing the TC. Hal w/ Sporty's
worked on the approval for all of us so inclined to do so.

They're on back-order, if that tells you how successful the product is.
--

Thx, {|;-)

Victor J. (Jim) Osborne, Jr.
"Maule Driver" wrote in message
...
What is the story with replacing the TC with an electric AI?

I thought that had been generally prohibited in most/all a/c. There was
an effort to change that but I didn't think anything had happened.

Paul kgyy wrote:
Sporty's pilot shop has a nifty electric AI that can legally replace
your Turn Coordinator. That's the way I'd go if I hadn't already
installed an STEC in there.

The wet pump is another good alternative, though the gyros can still
fail.

I have a good friend who added a ventury. Still works even if your
engine quits.

Helen