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02-11-2017, 07:52 AM
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Join Date: Feb 2006
Posts: 165
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Alternate Static Air
Howdy to all,
I am installing my static air system and have been wondering if others are installing a alternate static air input that I could open if I ever had a problem with ice (hope not) or contamination. A valve could be close to me that I could open that would at least give cabin air as a source..
If so, are there any valves that would be better than others
Thank you all for your valued input:-))
__________________
Craig Rufi
FLYING NOW AFTER 13+ YEARS. NICE FLYING AIRCRAFT!!
RV-10/Empennage/Wings/QB Fuselage/Wiring/Doors done finally, Cowling done. Stein panel complete, and connecting all those wires :-))Thousand Oaks, Ca. Dues paid for 2019
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02-11-2017, 09:59 AM
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Join Date: Feb 2010
Location: Vancouver, BC, Canada
Posts: 860
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Alternate Static Air
I'm using a Clippard TV-2SP panel mounted valve with a Clippard 15070 muffler in the open port (only to prevent debris from entering the valve).
http://www.clippard.com/part/TV-2SP
http://www.clippard.com/part/15070
__________________
Terry Edwards
RV-9A (Fuselage)
2020/2021 VAF Contribution Sent
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02-11-2017, 10:15 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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02-11-2017, 10:21 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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Quote:
Originally Posted by Brantel
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+1 Yep - me too
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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02-11-2017, 11:15 AM
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Join Date: Nov 2009
Location: Cambridge, UK
Posts: 83
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Alternate alternate static air
I've been contemplating doing this with a small solenoid valve and an electrical switch on the panel. The main reason is that Stein's (excellent) valve doesn't look right on my panel alongside the other (rocker) switches. One other benefit would be that I can monitor the switch and have a warning on the EFIS. The downside is that this function is electrically dependent. The other option would be to hide Stein's valve away somewhere but then it's not obvious to anyone else who flies the plane. I don't have to decide yet, so I'm procrastinating  .
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02-11-2017, 12:11 PM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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If you ever sat in a Piper PA 28 series pilot seat, you would find the alt static source sticker near your right knee with the simple 1/4 turn valve under and behind the panel lip. Simple and easy.......
Think about how you do it..... and later it can also be used as a test port.
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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02-11-2017, 12:15 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by Raiz
I've been contemplating doing this with a small solenoid valve and an electrical switch on the panel. The main reason is that Stein's (excellent) valve doesn't look right on my panel alongside the other (rocker) switches. One other benefit would be that I can monitor the switch and have a warning on the EFIS. The downside is that this function is electrically dependent. The other option would be to hide Stein's valve away somewhere but then it's not obvious to anyone else who flies the plane. I don't have to decide yet, so I'm procrastinating  .
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I put one of these on mine. Changes the look and makes people leave it alone.

Last edited by Brantel : 02-11-2017 at 12:18 PM.
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02-11-2017, 12:34 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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And again . .
Quote:
Originally Posted by Brantel
I put one of these on mine. Changes the look and makes people leave it alone.

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+1 Yep, me too.
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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02-11-2017, 02:13 PM
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Join Date: Oct 2005
Posts: 1,516
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Not sure why??
Why are you even contemplating an alternate static source?
In 35 years of flying, I have never heard of anyone having a static line blockage.
Isn't one of the reasons for installing 2 static ports as per plans to build redundancy into the static system?
We don't install 2 pitots where blockage of ice or bugs is much more common
than on static ports.
Like piper and Cessnas, an alternate static port can be tucked away under the seat or behind the panel where it is still accessible from the pilot's seat.
That is a neat looking switch from Stein.
Quote:
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One other benefit would be that I can monitor the switch and have a warning on the EFIS.
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Not sure how you would monitor your static pressure.
__________________
Ernst Freitag
RV-8 finished (sold)
RV-10 Flyer 600 plus hours
Running on E10 mogas
Don't believe everything you know.
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02-11-2017, 03:14 PM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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But...
With the electrical switch you could monitor switch position on the EFIS...
Then you would know where the switch was but what about the relay? And even if you monitored the switch AND the relay, you would still not know if the opening was plugged up...
"...the job of an engineer is to make simple things complicated..."
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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