Good AI backup, wish me luck

I'm surprised no one has mentioned wet vacuum pumps. I'm considering a
wet pump when the current dry pump gives up the ghost, as it sounds like
wet pumps are nearly bullet-proof. That said, I have been lucky in that I
still have not had a vacuum pump go out on me. I have had several gyros
fail though.



--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759

If you already have a few oil leaks, then the wet pump won't annoy you.
Those oil/air separators in the discharge are not perfect.
---JRC---

"Ray Andraka" wrote in message =
...
I'm surprised no one has mentioned wet vacuum pumps. I'm considering =
a
wet pump when the current dry pump gives up the ghost, as it sounds =
like
wet pumps are nearly bullet-proof. That said, I have been lucky in =
that I
still have not had a vacuum pump go out on me. I have had several =
gyros
fail though.
=20

Ray Andraka opined

I'm surprised no one has mentioned wet vacuum pumps. I'm considering a
wet pump when the current dry pump gives up the ghost, as it sounds like
wet pumps are nearly bullet-proof. That said, I have been lucky in that I
still have not had a vacuum pump go out on me. I have had several gyros
fail though.

At one point I thought about replacing the dry pumps on a Twin Comanche with
wet ones. Seems that you need to go through a bunch of STC or 337 field
approval paper work to do the swap. So I dropped the idea.



-ash
Cthulhu for President!
Why vote for a lesser evil?

"Ash Wyllie" wrote in message =
...
Ray Andraka opined
=20
I'm surprised no one has mentioned wet vacuum pumps. I'm considering =
a
wet pump when the current dry pump gives up the ghost, as it sounds =
like
wet pumps are nearly bullet-proof. That said, I have been lucky in =
that I
still have not had a vacuum pump go out on me. I have had several =
gyros
fail though.
=20
At one point I thought about replacing the dry pumps on a Twin =
Comanche with
wet ones. Seems that you need to go through a bunch of STC or 337 =
field
approval paper work to do the swap. So I dropped the idea.
=20
=20
I don't know about Lycoming engines, but Continentals still have the oil =
galleries
under the mounting pads for the vacuum pumps.
I know because I recently had to replace a leaking seal on one of my dry =
pumps.
Probably a simple 337 would suffice for Continentals.
You'd just be changing back to the configuration they were originally =
designed for.
---JRC---

Mine (a '65 model) originally had a wet pump, and I believe it is what is listed
on the TC.


At one point I thought about replacing the dry pumps on a Twin Comanche with
wet ones. Seems that you need to go through a bunch of STC or 337 field
approval paper work to do the swap. So I dropped the idea.

-ash
Cthulhu for President!
Why vote for a lesser evil?

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759