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  #11  
Old 08-22-2018, 08:54 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Los Angeles
Posts: 551
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The real test is to use air and put soap bubbles on the seams.
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John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

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RV9A- Status: tail feathers done less tips
Wings done less tips and avionics
Fuselage 30%
www.pilotjohnsrv9.blogspot.com
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  #12  
Old 08-22-2018, 10:55 PM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 289
Wink This is simple but never full proof

  1. Apply air pressure (carefully)
  2. Log gauge pressure and temperature
  3. IF temp and pressure go down (normal)
  4. If temp and pressure go up (normal)
  5. If pressure goes down and temp stays the same or goes up (leak)

Do this for most of a day or overnight.

Use snoop to verify no leaks or pinpoint leak.

Nothing in life full proof.

Forget using gasoline....sheesh



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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018

Last edited by mfleming : 08-22-2018 at 11:08 PM.
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  #13  
Old 08-23-2018, 01:34 AM
didja didja is offline
 
Join Date: Jan 2017
Location: Goodyear, Az
Posts: 53
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I am just now getting ready to put the rear baffle on my left tank. I completed the water leak test for the second time, and have a pinhole leak to seal up, but other than that, good to go..... i'm kinda nervous about the pressure test! As easy as it sounds, still a bit unnerving the first time! All of these tips are greatly appreciated!
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RV-14a Kit# 140432
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  #14  
Old 08-24-2018, 07:08 AM
JDA_BTR JDA_BTR is offline
 
Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 634
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+1 for Snoop. Best thing ever. Has a little glycerin in it does a way better job than just soapy water. Get it wherever Swagelok is sold. Only about $4 a bottle.
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  #15  
Old 08-24-2018, 07:50 AM
HFS HFS is offline
 
Join Date: Aug 2009
Location: Lemoore, CA
Posts: 232
Default Monitoring the Temp?

How do you do it? I see the parts, but don't understand the actual process.

Thx

HFS
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  #16  
Old 08-24-2018, 08:40 AM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Los Angeles
Posts: 551
Default Pressure

Unless the temp is changing 10 s of degrees, i think local barometric pressure will have more influence. I did notice that the tank air temp and outside air temp took a few hours to find equilibrium but once everything stabilized it held for a few days this is not to be a science project unless u are into that. Manometer and soap bubbleswork well. See my blog on how i found and repaired a leak.
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John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

Extra dues paid 2018, worth every penny

RV9A- Status: tail feathers done less tips
Wings done less tips and avionics
Fuselage 30%
www.pilotjohnsrv9.blogspot.com
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