Well, at long last I've decided to go for my instrument rating. I'm having
a ball (aside from yesterday's disastrous simulator session), but now I'm facing the dilemma that every instrument student has to deal with: where to find an IFR-capable aircraft. My 1961-vintage 172B's panel has a six-pack,
a KY-97A, a GTR-225, and an ancient 300-series ARC ADF. Good solid comms, but not much else. That's nothing a boatload of money can't fix, except
for one thing: my vacuum gyros are powered by venturis. (It's great fun
when a young hotshot instructor from the flying school next door wanders over, points to the venturis, and says, "What's that?")
What makes it difficult is that my Continental O-300C (150 SMOH and
purring like a kitten) has no option for a vacuum pump. The O-300D
was the first model that provided a mounting pad on the rear case.
All my buddies walk me through Trade-A-Plane, etc., pointing out nice Cherokee 180s decked out with a 430W and a KX-155. That's well and
good, but the old girl has been in the family for over 40 years.
Heck, she _is_ family - my wife is doing her PPL in her right now.
So... is there any way to retrofit a vacuum system in my plane?
Adding a heated pitot and alternate static are trivial, and the
radios, as I mentioned above, are just a matter of money. But I
don't think it would be a good idea to take off into the soup when
my gyros aren't spun up until several minutes into the flight.
And conditions that would ice up a carburetor are bound to be
at least as bad for venturis - and they have no equivalent of
carburetor heat.
Common wisdom says get another airplane. But there's the
sentimental factor here. Any ideas?
On 1/22/2017 11:17 AM, Charlie Gibbs wrote:
Have you considered a Garmin G5 or similar EFIS and eBaying the
mechanical gyros?
Well, at long last I've decided to go for my instrument rating. I'm having
a ball (aside from yesterday's disastrous simulator session), but now I'm facing the dilemma that every instrument student has to deal with: where to find an IFR-capable aircraft. My 1961-vintage 172B's panel has a six-pack,
a KY-97A, a GTR-225, and an ancient 300-series ARC ADF. Good solid comms, but not much else. That's nothing a boatload of money can't fix, except
for one thing: my vacuum gyros are powered by venturis. (It's great fun
when a young hotshot instructor from the flying school next door wanders over, points to the venturis, and says, "What's that?")
What makes it difficult is that my Continental O-300C (150 SMOH and
purring like a kitten) has no option for a vacuum pump. The O-300D
was the first model that provided a mounting pad on the rear case.
All my buddies walk me through Trade-A-Plane, etc., pointing out nice Cherokee 180s decked out with a 430W and a KX-155. That's well and
good, but the old girl has been in the family for over 40 years.
Heck, she _is_ family - my wife is doing her PPL in her right now.
So... is there any way to retrofit a vacuum system in my plane?
Adding a heated pitot and alternate static are trivial, and the
radios, as I mentioned above, are just a matter of money. But I
don't think it would be a good idea to take off into the soup when
my gyros aren't spun up until several minutes into the flight.
And conditions that would ice up a carburetor are bound to be
at least as bad for venturis - and they have no equivalent of
carburetor heat.
Common wisdom says get another airplane. But there's the
sentimental factor here. Any ideas?
--
/~\ cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ / I'm really at ac.dekanfrus if you read it the right way.
X Top-posted messages will probably be ignored. See RFC1855.
/ \ HTML will DEFINITELY be ignored. Join the ASCII ribbon campaign!
Check this out! It's a backup vaccum system that used vaccum from the engines intake manifold. Not the bee's knees but better than nothing
or a $2K plus electrically driven vacuum pump...
http://www.aircraftspruce.com/catalog/inpages/stndby_vacsys.php
Sorry if my reply is too dated.
Well, at long last I've decided to go for my instrument rating. I'm having
a ball (aside from yesterday's disastrous simulator session), but now I'm facing the dilemma that every instrument student has to deal with: where to find an IFR-capable aircraft. My 1961-vintage 172B's panel has a six-pack,
a KY-97A, a GTR-225, and an ancient 300-series ARC ADF. Good solid comms, but not much else. That's nothing a boatload of money can't fix, except
for one thing: my vacuum gyros are powered by venturis. (It's great fun
when a young hotshot instructor from the flying school next door wanders over, points to the venturis, and says, "What's that?")
What makes it difficult is that my Continental O-300C (150 SMOH and
purring like a kitten) has no option for a vacuum pump. The O-300D
was the first model that provided a mounting pad on the rear case.
All my buddies walk me through Trade-A-Plane, etc., pointing out nice Cherokee 180s decked out with a 430W and a KX-155. That's well and
good, but the old girl has been in the family for over 40 years.
Heck, she _is_ family - my wife is doing her PPL in her right now.
So... is there any way to retrofit a vacuum system in my plane?
Adding a heated pitot and alternate static are trivial, and the
radios, as I mentioned above, are just a matter of money. But I
don't think it would be a good idea to take off into the soup when
my gyros aren't spun up until several minutes into the flight.
And conditions that would ice up a carburetor are bound to be
at least as bad for venturis - and they have no equivalent of
carburetor heat.
Common wisdom says get another airplane. But there's the
sentimental factor here. Any ideas?
--
/~\ cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ / I'm really at ac.dekanfrus if you read it the right way.
X Top-posted messages will probably be ignored. See RFC1855.
/ \ HTML will DEFINITELY be ignored. Join the ASCII ribbon campaign!
Nothing wrong with using the venturi vac system unless you get into ice. BH
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