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06-01-2013, 10:13 PM
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Join Date: Sep 2010
Location: Redlands, Ca.
Posts: 1,458
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Quote:
Originally Posted by jchang10
I got my vacuum valve with clamps (thank you Allan), and i assumed it would be an easy install. Murphy strikes again!
Unfortunately, it turns out there is precious little straight runs in the exhaust system on the -10. I am still unsure of exactly where i can mount it appropriately.
It looks like most -10 welded installs put it right on the curvy part of the tubing, which won't clamp well with the clamp system.
There is a chance it will fit on the only straight section right underneath the firewall but the clearances are tight. Also, it will make removing the hinge pin difficult.
Argh!
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....If you can take some photos and tell us what you need we will make you a custom part to solve the problem. very sorry to hear you ran into this. Allan... 
__________________
Allan Nimmo
AntiSplatAero.com
Innovative Aircraft Safety
Products, Tools & ServicesInfo@AntiSplatAero.com Southern California (KREI)
RV-9A / Edge-540 
(909) 824-1020
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06-01-2013, 11:51 PM
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Join Date: Nov 2005
Location: San Francisco, CA
Posts: 525
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Hi Allan... it's certainly not your fault! you delivered exactly as promised. i was so excited about not having to farm out for the welding job, that i hadn't even considered any other possibility other than this would be a cinch.
I'd be more than happy to take some photos, but it may take a few days. I did find this link below to Ernst's post that shows the -10 exhaust. You can see how it curves straight out of the heat muff.
http://www.vansairforce.com/communit...8&postcount=51
It might be possible to fit the clamp right in Ernst's same location with a smaller clamping plate, possibly.
I didnt have much time to study it today. Unfortunately, it might take me a few days to get time to look at it again.
I hope someone else may have a suggestion as well. Thanks again for all the help and great products!
Jae
__________________
#40533 RV-10 Builder and CFI
1/2006 Started build
10/19/2011 First flight
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06-02-2013, 10:13 AM
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Join Date: Nov 2010
Location: West Linn, Oregon
Posts: 1,351
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Here are some pictures of my welded on one, as well as shots showing how little straight tubing there is for a saddle like this.
http://myrv10factory.wordpress.com/2...valve-welding/
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CharlieWaffles - But you can call me " Mark"
RV-10
N928MT
Flying - AKA Still Tinkering
Build Project Site
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06-02-2013, 10:32 AM
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Join Date: Oct 2005
Posts: 1,516
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Jae,
you may consider a location up near the header, there are straight sections
on both sides.
According to Dan Horton, this area of the exhaust is more efficient but
it is almost uphill from the exit of the separator.
There is simply no straight section downstream from the mufflers that can accept a saddle fitting.
__________________
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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06-06-2013, 11:05 PM
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Join Date: Nov 2005
Location: San Francisco, CA
Posts: 525
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I didn't find much room upstream the muff either. The pipe runs are fairly tight there, too.
I finally got around to it and got it mounted. I ended up mounting it to the side where the clamping plate fit without modification. I thought i would need to trim some of it but never did.
No test flight yet, since I have to wait for Obama to leave tomorrow!

__________________
#40533 RV-10 Builder and CFI
1/2006 Started build
10/19/2011 First flight
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06-07-2013, 06:13 AM
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Join Date: Oct 2005
Posts: 1,516
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Nice job
That looks nice and seems to fit perfectly.
Mine is welded in place right there and works great.
Sorry you are locked in by the Presidential TFR,
great timing for Golden West. 
__________________
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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06-07-2013, 06:28 AM
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Join Date: Apr 2012
Location: Tampa (BKV)
Posts: 926
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I have a question. While I love the idea of removing air pressure from the case, what happens when the valve stops working? If it fails open, no problem....but if it fails closed...wouldn't it blow out a seal on the engine? Couldn't that get rather interesting in flight if it blows oil all over the place?
Are we expecting a moving part with baked oil on it to never stick?
__________________
RV-8 Flying
1,235th flying RV8
SARL Race#95
SnF Homebuilt Judge
2015 Sun n Fun Kit Built Reserve Grand Champion
2015 Oshkosh Kit Built Champion
2015 Jeffco Kit Built Grand Champion
2014 Oshkosh Outstanding Workmanship Award
Broken Warrior of the Jarhead Clan
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06-07-2013, 09:03 AM
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Join Date: Sep 2010
Location: Redlands, Ca.
Posts: 1,458
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Quote:
Originally Posted by ColoRv
I have a question. While I love the idea of removing air pressure from the case, what happens when the valve stops working? If it fails open, no problem....but if it fails closed...wouldn't it blow out a seal on the engine? Couldn't that get rather interesting in flight if it blows oil all over the place?
Are we expecting a moving part with baked oil on it to never stick?
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.....I addressed this it another thread and you need not be concerned. The valve is a reed valve and the only kind of failure it can have is wide open if the reed were to break the only consequence would be a loss of the gained performance improvement. We have been using and selling these systems from 1969 to date (many thousands) and I can't remember ever seeing a failure or a bad valve. Hope this puts your mind at ease. Thanks, Allan... 
__________________
Allan Nimmo
AntiSplatAero.com
Innovative Aircraft Safety
Products, Tools & ServicesInfo@AntiSplatAero.com Southern California (KREI)
RV-9A / Edge-540 
(909) 824-1020
Last edited by PerfTech : 06-07-2013 at 09:07 AM.
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