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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26320
Location: Livermore CA USA
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 Posted: Mon Apr 19, 2010 12:51 pm Post subject: Check Valve For Static System Cabin Venting... |
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Dear Listers,
Looking at the requirements for IFR certification of the RV-8, it looks like the only thing I don't have is an "alternate static source". This seems like it would be as simple as adding a "T" valve in the 1/4 neoprem static air tube that goes along under the left hand canopy rail.
Does anyone have any suggestions on something I could just cut the tube and stick in line with a little thumb screw to switch between the fuselage or cabin source?
I'm assuming this will meet the requirement?
Thanks!
PS - Attached are a couple of pictures from Taxi-testing and Magnetometer calibration this weekend. Cool?
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
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Matt Dralle
Matronics Email List Administrator |
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pitts_pilot(at)bellsouth.
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| Posted: Mon Apr 19, 2010 3:00 pm Post subject: Check Valve For Static System Cabin Venting... |
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Matt, cut the tubing, insert a 'T' with a short stub of tubing. Put a
plug in the tube of a type that you can pull out easily if needed.
Simple, light, and inexpensive.
Linn
Matt Dralle wrote:
| Quote: | Dear Listers,
Looking at the requirements for IFR certification of the RV-8, it looks like the only thing I don't have is an "alternate static source". This seems like it would be as simple as adding a "T" valve in the 1/4 neoprem static air tube that goes along under the left hand canopy rail.
Does anyone have any suggestions on something I could just cut the tube and stick in line with a little thumb screw to switch between the fuselage or cabin source?
I'm assuming this will meet the requirement?
Thanks!
PS - Attached are a couple of pictures from Taxi-testing and Magnetometer calibration this weekend. Cool?
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
|
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26320
Location: Livermore CA USA
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| Posted: Mon Apr 19, 2010 6:48 pm Post subject: Check Valve For Static System Cabin Venting... |
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At 03:53 PM 4/19/2010 Monday, you wrote:
| Quote: |
Matt, cut the tubing, insert a 'T' with a short stub of tubing. Put a plug in the tube of a type that you can pull out easily if needed.
Simple, light, and inexpensive.
Linn
Matt Dralle wrote:
>Dear Listers,
>
>Looking at the requirements for IFR certification of the RV-8, it looks like the only thing I don't have is an "alternate static source". This seems like it would be as simple as adding a "T" valve in the 1/4 neoprem static air tube that goes along under the left hand canopy rail.
>
>Does anyone have any suggestions on something I could just cut the tube and stick in line with a little thumb screw to switch between the fuselage or cabin source?
>
>I'm assuming this will meet the requirement?
>
>Thanks!
|
What a great idea, Linn! Thanks. Here's what I did tonight including a couple of pictures...
I added a small "T" Nylon fitting in the 1/4" tube for static air just in front of the instrument panel under the left cockpit rail. I cut a short piece of 1/4" tubing and filled it with black RTV and then put a piece of heat shrink tubing over it to form a handle. The whole thing fits nicely under the cockpit rail and from the pilot's position is just barely visible, yet can be accessed easy. In the event that icing conditions occur, the fitting can be unscrewed and the plug removed for cabin venting.
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Final Bits/Inspection/Test Flight
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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Matt Dralle
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lm4(at)juno.com
Guest
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| Posted: Tue Apr 20, 2010 5:16 am Post subject: Check Valve For Static System Cabin Venting... |
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Matt,
The people who do pneumatics installations use a certain size tubing and with it comes plastic fittings that allow you to push the tubing into the fitting. When you do it ,the fitting, snaps into place and locks the two together. They also make t's and even a panel mount pneumatic toggle switch. HTH
Larry
On Apr 19, 2010, at 4:50 PM, Matt Dralle wrote:
| Quote: |
Dear Listers,
Looking at the requirements for IFR certification of the RV-8, it looks like the only thing I don't have is an "alternate static source". This seems like it would be as simple as adding a "T" valve in the 1/4 neoprem static air tube that goes along under the left hand canopy rail.
Does anyone have any suggestions on something I could just cut the tube and stick in line with a little thumb screw to switch between the fuselage or cabin source?
I'm assuming this will meet the requirement?
Thanks!
PS - Attached are a couple of pictures from Taxi-testing and Magnetometer calibration this weekend. Cool?
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
<2010.04.17 - RV-8 - Taxi Testing (1).jpg><2010.04.17 - RV-8 - Taxi Testing (2).jpg><2010.04.17 - RV-8 - Taxi Testing (6).jpg><2010.04.17 - RV-8 - Taxi Testing ( .jpg><2010.04.17 - RV-8 - Taxi Testing (11).jpg><2010.04.17 - RV-8 - Taxi Testing (15).jpg><2010.04.17 - RV-8 - Taxi Testing (24).jpg><2010.04.17 - RV-8 - Taxi Testing (25).jpg><2010.04.17 - RV-8 - Taxi Testing (26).jpg><2010.04.17 - RV-8 - Taxi Testing (27).jpg><2010.04.17 - RV-8 - Taxi Testing (33).jpg><2010.04.17 - RV-8 - Taxi Testing (36).jpg><2010.04.17 - RV-8 - Taxi Testing (37).jpg><2010.04.17 - RV-8 - Taxi Testing (39).jpg><2010.04.17 - RV-8 - Taxi Testing (40).jpg><2010.04.17 - RV-8 - Taxi Testing (4.jpg><2010.04.17 - RV-8 - Taxi Testing (52).jpg><2010.04.17 - RV-8 - Taxi Testing (5.jpg><2010.04.17 - RV-8 - Taxi Testing (60).jpg>
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| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Gary.A.Sobek
Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA
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| Posted: Tue Apr 20, 2010 6:08 am Post subject: Check Valve For Static System Cabin Venting... |
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Matt:
Checkout the SafeAir alternate static port. Toward the bottom of this page.
http://www.safeair1.com/PS_1.htm
You should be able to make something like it if you do not wish to purchase theirs.
Gary A. Sobek
"My Sanity" RV-6 N157GS O-320 Hartzell,
2,346+ Flying Hours So. CA, USA
| Quote: | On Apr 19, 2010, at 4:50 PM, Matt Dralle wrote:
|
---snip ---
Looking at the requirements for IFR certification of the RV-8, it looks like the only thing I don't have is an "alternate static source". This seems like it would be as simple as adding a "T" valve in the 1/4 neoprem static air tube that goes along under the left hand canopy rail.
Does anyone have any suggestions on something I could just cut the tube and stick in line with a little thumb screw to switch between the fuselage or cabin source?
--- snip ---
Matt Dralle
RV-8 #82880 N998RV
Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. Learn more. [quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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Vanremog(at)aol.com
Guest
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| Posted: Tue Apr 20, 2010 7:50 am Post subject: Check Valve For Static System Cabin Venting... |
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Matt-
Checkout SMC's product offerings. They have an office in San Jose.
http://www.smcusa.com/sections/products/fittings_tubings.asp
-GV
In a message dated 4/19/2010 8:03:53 P.M. Pacific Daylight Time, dralle(at)matronics.com writes:
| Quote: | At 03:53 PM 4/19/2010 Monday, you wrote:
| Quote: | --> RV-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net>
Matt, cut the tubing, insert a 'T' with a short stub of tubing. Put a plug in the tube of a type that you can pull out easily if needed.
Simple, light, and inexpensive.
Linn
Matt Dralle wrote:
>Dear Listers,
>
>Looking at the requirements for IFR certification of the RV-8, it looks like the only thing I don't have is an "alternate static source". This seems like it would be as simple as adding a "T" valve in the 1/4 neoprem static air tube that goes along under the left hand canopy rail.
>
>Does anyone have any suggestions on something I could just cut the tube and stick in line with a little thumb screw to switch between the fuselage or cabin source?
>
>I'm assuming this will meet the requirement?
>
>Thanks!
|
What a great idea, Linn! Thanks. Here's what I did tonight including a couple of pictures...
I added a small "T" Nylon fitting in the 1/4" tube for static air just in front of the instrument panel under the left cockpit rail. I cut a short piece of 1/4" tubing and filled it with black RTV and then put a piece of heat shrink tubing over it to form a handle. The whole thing fits nicely under the cockpit rail and from the pilot's position is just barely visible, yet can be accessed easy. In the event that icing conditions occur, the fitting can be unscrewed and the plug removed for cabin venting.
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Final Bits/Inspection/Test Flight
|
[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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