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01-20-2019, 10:09 AM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by guidoism
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Looks normal to me. That is what they do. As previous person mentioned, you set the pressure with the tool running/flowing and ignore the pressure shown when the tool is not running. The delta will be different for each tool, based upon it's flow rate.
Larry
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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01-20-2019, 10:12 AM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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yep...
Yep, that's what it does.
Set the running pressure and don't worry about the static...
__________________
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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01-20-2019, 10:25 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Looks like a pretty small unit-------what is the PSI rating and what are the CFM ratings ??
You might need to get a better compressor............or possibly you could add an additional tank and get better performance.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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01-20-2019, 11:08 AM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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changes
A bigger/better compressor isn't going to change what is being seen on the gauge...
I am using an 80 gallon, 14 CFM @ 175 PSI, two stage compressor plumbed with 3/4" lines and I see the same thing on my tool regulators...
__________________
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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01-20-2019, 11:11 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by guidoism
5.30 CFM @ 90 PSI
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Air drill needs about 12 CFM.
Rivet gun may eat that much also, but due to being used for short bursts it will not seem that hungry for air.
Paint gun and die grinders-----not sure, but probably pretty close to your unit's max output.
Does the compressor have a non-regulated output?? if so, you could try running that to a larger tank, then to regulate that output.
I am still of the opinion that your issue is one of airflow. It is also possible that the way your unit is plumbed, there may be restriction in the flow going to the regulator, and it is responsible for the pressure drop.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Last edited by Mike S : 01-20-2019 at 11:18 AM.
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01-20-2019, 11:14 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by rocketman1988
I am using an 80 gallon, 14 CFM @ 175 PSI, two stage compressor plumbed with 3/4" lines and I see the same thing on my tool regulators...
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Sounds like we have very similar compressors, I also see a pressure drop when using most any tool, but the drop is pretty small.
Guido is showing 35--40 PSI drop.......
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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01-20-2019, 11:36 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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Quote:
Originally Posted by Mike S
Air drill needs about 12 CFM.
Rivet gun may eat that much also, but due to being used for short bursts it will not seem that hungry for air.
Paint gun and die grinders-----not sure, but probably pretty close to your unit's max output.
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Mike,
This is a bit of thread drift, but I encourage you to rethink that post. While a drill might demand that much flow when actually running all out, the demands on the *compressor* by one guy in his garage building an a/c are nothing like that high. Through an entire -7 airframe build, the only time I had to wait on a little oil-less compressor with a 10 gal tank was while using a die grinder, which is *much* worse than a drill.
It does new builders a disservice when a 'veteran' builder tells them they can't build effectively without the most expensive tools, the biggest commercial shop size compressors, etc.
Charlie
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01-20-2019, 12:41 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by rv7charlie
It does new builders a disservice when a 'veteran' builder tells them they can't build effectively without the most expensive tools, the biggest commercial shop size compressors, etc.
Charlie
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Charlie, sorry if that is how I came across---------I was not trying to tell him he "can't" build effectively, I was responding to his original question, and was trying to help him diagnose the reason his unit was acting the way it was in his video.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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01-20-2019, 01:09 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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This is not that difficult.
Quote:
Originally Posted by lr172
Looks normal to me. That is what they do. As previous person mentioned, you set the pressure with the tool running/flowing and ignore the pressure shown when the tool is not running. The delta will be different for each tool, based upon it's flow rate.
Larry
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Quote:
Originally Posted by rocketman1988
Yep, that's what it does.
Set the running pressure and don't worry about the static...
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Quote:
Originally Posted by Mike S
Looks like a pretty small unit-------what is the PSI rating and what are the CFM ratings ??
You might need to get a better compressor............or possibly you could add an additional tank and get better performance.
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I just went and set mine to 60 psi and with an air blower it dropped way down to 55 psi. Tank size, compressor rated SCFM, has nothing to do with this regulator. I simply does not function properly 30psi drop is too much. It may be design, maybe an internal failure, but it is NOT NORMAL for a proper regulator. Back to Mike's first comment, it could be some internal restriction of the manifold.
More than 10psi drop is an issue for any regulator, they don't have to be expensive. If you have a hose connection to full tank pressure, put a regulator on a quick coupler at the end of your hose and try that. If it does not work properly then there is an internal restriction.
__________________
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.”
Last edited by BillL : 01-20-2019 at 01:13 PM.
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