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04-16-2018, 05:59 PM
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Join Date: Feb 2018
Location: Perry GA
Posts: 27
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Compressed Air Hose Size
Hooking up my compressor. Any pros/cons for 1/4 or 3/8? line?
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Hutch
David W. Hutchinson
NAAA/PAAO Certified Aircraft Appraiser (Nationwide)
Perry, GA.
RV-10/N433DH (Res)
www.TwoEaglesAviation.com
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04-16-2018, 06:07 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,152
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For building an RV? Unless you are going further than 500' with 1/4" hose, NO. It doesn't matter.
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Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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04-16-2018, 06:14 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,931
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Building or painting
For building (riveting, drilling, etc) I use a 1/4 line long enough to cover my work area.
For painting (HVLP) I use a 3/8" line.
Maybe it doesn't matter. I've sprayed with the 1/4" with no problems.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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04-16-2018, 07:22 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Use this handy little chart -
A 5 cfm die grinder at 100 ft has a pressure difference of about 10 psi for a 100 ft of 1/4 vs 3/8. probably would have no effect.
However, if you have a big honking compressor and have tools that use a lot of CFM, then the bigger hose size would be better. 
I sometimes need almost 100 ft lines to get air out to the ramp in front of my hangar.
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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04-16-2018, 07:59 PM
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Join Date: Oct 2007
Location: Salmon Arm, BC
Posts: 933
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My die grinder and my orbital sander run noticeably stronger with the 3/8 line. I use 1/4" line for my 1/4" drill, rivet squeezer, cleco remover, and pull riveter.
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Mark Olson
1987 RV-4 Sold
2003 Super Decathlon - Sold
F1 EVO Rocket, first flight May 31/14
First in line for the Sonex JSX-2T kit
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04-16-2018, 08:19 PM
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Join Date: Jul 2015
Location: Lake in the Hills, IL
Posts: 169
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Looks like I overbuilt. Story of my life. Put in 3/4" Rapidair line to my basement and garage and have 3/8" hoses. I have added the 1/4" flexible Cleaveland hose for ease of use the last few feet. And when I cook I always have leftovers...
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Jeff Dingbaum
RV-14A empennage, wings, fuselage
Cherokee 180
2020 dues paid
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04-16-2018, 09:16 PM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,428
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Hoses have differing flexibilities. I prefer the more flexible ones - to me, with my limited hose lengths (typically 25' or 50') that's more important than size. However, I haven't painted with these yet.
Dave
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04-16-2018, 10:43 PM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Quote:
Originally Posted by coffeeguy
Looks like I overbuilt. Story of my life. Put in 3/4" Rapidair line to my basement and garage and have 3/8" hoses. I have added the 1/4" flexible Cleaveland hose for ease of use the last few feet. And when I cook I always have leftovers... |
When plumbing for air, consider each 90 degree elbow to have the same loss as 20 feet of same size pipe...... you can't overbuild.
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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