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02-07-2016, 01:55 PM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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Leaky Tires
I know it has been discussed some in the past, but I can hardly believe how fast my tires go down, even though it has never even been flown yet, it is like there are porus tubes inside! I can't put up with this, what have others done to fic the problem?
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02-07-2016, 01:59 PM
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Join Date: Oct 2010
Location: Elkton, Md.
Posts: 1,650
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Quote:
Originally Posted by DonFromTX
I know it has been discussed some in the past, but I can hardly believe how fast my tires go down, even though it has never even been flown yet, it is like there are porus tubes inside! I can't put up with this, what have others done to fic the problem?
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Try inflating them with Nitrogen.
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Wag Aero Sport Trainer built,sold and wrecked
N588DF RV12 #336 built, sold and alive and well in New York
N73DF RV12 #244 built, sold and alive and well in Florida
N91 RV RV9 I wish I could say I built this one! Mark Santoleri hit the ball out of the park on this gem.
Currently restoring a 1978 Citabria GCBC
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02-07-2016, 02:02 PM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 920
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I lose about one pound of pressure per month. Be sure that your air valves are properly sealing. The external ambient air temperature will also effect the tire pressure somewhat.
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David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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02-07-2016, 03:02 PM
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Join Date: Jan 2005
Location: Georgetown, TX
Posts: 396
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The standard tubes lose air quite rapidly (believe it or not, the air seeps thru the rubber). You can order no leak tubes that work well from Dresser or Aircraft Spruce, but are expensive but worth it
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Deene Ogden.
N399AD RV-12...flying
N299AD RV8 QB, IO-390X, BA prop...SOLD
N199AD One Design...SOLD
N99AD BD4, flew for 22 years...SOLD
EAA Tech Counselor/Flight Advisor
CFII, MEI, CFIG
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02-07-2016, 03:35 PM
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Join Date: Dec 2011
Location: Edinburg, TX
Posts: 617
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Good quality no leak tubes and nitrogen will solve the issue
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RV-3 Rebuilding
RV-9 Flying and having fun, experimenting and having fun, did I mention flying and having fun?
RV-6A SOLD
Maule M5-235C SOLD
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Stinson L5 SOLD
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02-07-2016, 03:41 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,027
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Quote:
Originally Posted by deene
The standard tubes lose air quite rapidly (believe it or not, the air seeps thru the rubber). You can order no leak tubes that work well from Dresser or Aircraft Spruce, but are expensive but worth it
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RV kits have come with leak-stop tubes for many years now.
If pressure goes down you should look for a slow leak
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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02-07-2016, 04:05 PM
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Join Date: Jan 2006
Posts: 905
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check the schrader valve inserts. That's the cause usually. I use tubes/tires (replaced orginal due to wear) made by Air Hawk and they hold psi for several months.
dick
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02-07-2016, 04:08 PM
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Join Date: Oct 2012
Location: New Ulm, Minnesota
Posts: 283
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leaky tires
Change to leak stop tubes, they can be found at Aircraft spruce and others.
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Robin Mckee
New Ulm, MN 56073
RV3b N219BB
420 hours and counting 
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02-07-2016, 04:26 PM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,818
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I had a bad Schrader valve insert. I replaced it and mine hold pressure for six months before I have to add air.
A friend who just bought an SLSA RV-12 had his tire go flat in a few months. When he changed it out it looked like it had spots with tough surface where the air leaked. It looked like a manufacturing defect.
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02-07-2016, 04:44 PM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,243
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In my experience, ther is a distinct difference between Teh no-name "leak stop" tubes and the Michelin Air-Stop tubes in terms of air retention. Yes, there is also a price difference. With the Michelins, we check tire pressures maybe a couple of times a year in our three airplane's. If we use any other tube, it's once a month. If we do get a leaker, it is generally a valv that isn't closing - and for that reason, we always use metal caps with gaskets to back up the valve.
Desser sells the Michelins - or at least that is where I have always bought them.
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Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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