|
-
POSTING RULES
-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|
12-11-2015, 09:21 PM
|
 |
|
|
Join Date: Mar 2013
Location: El Dorado Hills, CA
Posts: 696
|
|
R-22 alt air door
Wondering if anyone has successfully made this adaptation. This seems like such a obvious solution. I had an R22 and verifying the function was part of preflight. That would be the only drawback I see is the inaccessibility to verify function with cowl on.
Starting FAB soon and would rather not use the cable operated door.
__________________
Blain
R-22 sold.
RV-8 AW Cert 02-09-17
N82 Sierra Tango
Avatar courtesy of AircraftStickers.com!
Dues gladly paid thru Nov. 2020(my reminder ).
|
12-12-2015, 06:50 AM
|
 |
|
|
Join Date: Jan 2005
Location: SC
Posts: 12,887
|
|
Quote:
Originally Posted by Blain
....
Starting FAB soon and would rather not use the cable operated door.
|
Then don't put one in. There are plenty of RV's flying without an alternate air valve.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
|
12-12-2015, 06:51 AM
|
 |
|
|
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
|
|
I just use a brass Reed valve. Automatic activation, light, simple, reliable. You guys are overthinking this with complex solutions.
|
12-12-2015, 09:38 AM
|
|
|
|
Join Date: Dec 2009
Location: La Center,wa
Posts: 209
|
|
Quote:
Originally Posted by Steve Melton
I would never put all those pieces in there.
|
Are you talkin' about the air box or the whole machine 
Tim |
12-12-2015, 10:04 AM
|
|
|
|
Join Date: Feb 2010
Location: Vancouver, BC, Canada
Posts: 859
|
|
Alternate Air
Quote:
Originally Posted by rv6ejguy
I just use a brass Reed valve. Automatic activation, light, simple, reliable. You guys are overthinking this with complex solutions.
|
Ross, do you have pictures or drawings? How thick is the brass reed valve? Is it preloaded (by bending?) in any way? What delta P does it need to fully open?
__________________
Terry Edwards
RV-9A (Fuselage)
2020/2021 VAF Contribution Sent
|
12-12-2015, 10:41 AM
|
|
|
|
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
|
|
Quote:
Originally Posted by terrye
Ross, do you have pictures or drawings? How thick is the brass reed valve? Is it preloaded (by bending?) in any way? What delta P does it need to fully open?
|
Posted it a couple of times here in years past if you search. Brass sheet stock about .010 thick, takes only maybe 5-10 inches H2O differential to pull it open. The rest is up to your imagination and creativity... |
12-12-2015, 06:50 PM
|
|
|
|
Join Date: Sep 2007
Location: Central IL
Posts: 5,514
|
|
Quote:
Originally Posted by rv6ejguy
Posted it a couple of times here in years past if you search. Brass sheet stock about .010 thick, takes only maybe 5-10 inches H2O differential to pull it open. The rest is up to your imagination and creativity... |
http://www.vansairforce.com/communit...4&postcount=15
I would put a steel backer so it does not bend and fracture - like steel reed valves on two stroke engines. A big 4 cylinder will have a pretty large pressure pulse.
__________________
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.”
|
12-12-2015, 10:18 PM
|
|
|
|
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
|
|
Quote:
Originally Posted by BillL
|
Doesn't move in flight as ram pressure keeps it seated and it should never move unless the primary inlet iced over or got a bird over 2.5 inches in diameter got stuck in it. |
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 12:41 PM.
|
