---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Wed 09/02/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:10 AM - Re: Flat main tire on takeoff or landing (Larry Helming) 2. 09:27 AM - Re: Flat main tire on takeoff or landing (Rob Prior) 3. 01:24 PM - Re: Flat main tire on takeoff or landing (rafael) ________________________________ Message 1 _____________________________________ Time: 05:10:04 AM PST US Subject: Re: RV7-List: Flat main tire on takeoff or landing From: Larry Helming No I haven't and I don't know of anyone. Sounds like you were lucky not to have lost control. I suggest you check tire pressure during each flight's preflight inspection. I know my tires lose pressure with time and flying time and landings. You might consider the new tubes that cost more but don't lose pressure. Also, maybe more space between the tire and wheel faring should be considered. Contact Vans for more info. Indiana Larry On Tue, Sep 1, 2009 at 3:04 PM, Jeff Hove wrote: > > Has anyone with a 7A (or other RV) experienced a flat main tire during > takeoff or landing? Were you able to keep it on the runway? Did the > wheel-pant survive? > > I had a left main inner-tube fail during the taxi to the runway last week > and even at a slow taxi it was hard to keep it straight as the tire > deflated. Had the tube let go a minute later I'd have been on the take-off > roll. The tire was fine and the tube was only 2 years old and looked ok > except for a quarter-sized area where the rubber had become cracked and > leaky. Apparently a manufacturing defect as there were no rough spots or > FOD in the tire to cause this. > > The way the tire bunched up inside the wheel-pant made me wonder if the > wheel would continue turning and if even full opposite rudder and brake > would be enough to keep the plane rolling straight had this happened at a > higher speed. > > Thanks, > Jeff Hove > > Flying my father's RV-A, N347RV. > > -- In God I Trust. ________________________________ Message 2 _____________________________________ Time: 09:27:48 AM PST US From: "Rob Prior" Subject: Re: RV7-List: Flat main tire on takeoff or landing On Tue, 01 Sep 2009 15:04:31 -0500 Jeff Hove wrote > The tire was fine and the tube was only 2 years old and > looked ok except for a quarter-sized area where the rubber had become > cracked and leaky. Apparently a manufacturing defect as there were no > rough spots or FOD in the tire to cause this. An RV-9A owner at our field had a flat tire on a relatively new tube as well. He found it while it was parked, so it never became a rolling incident. When we disassembled it to find the leak, we found that the area where the leak in the tube occurred was immediately opposite the place in the inside of the tire where an "Inspected OK" sticker had been placed... The owner remembered seeing the sticker when he assembled the wheel, but there wasn't much left of it after the tube failed, just a hard lump. I think it's highly likely that either some combination of the adhesive and label material formed a hard substance when subjected to the repeated heating/cooling cycles that the tires see, or maybe the label disintegrated, and the remaining adhesive just collected all of the random grit in the tire into one place. So when assembling your wheels, it might be a good idea to check very carefully for inspection stickers inside the tire, and make an effort to remove them and any adhesive residue before putting it all together. > Flying my father's RV-A, N347RV. Must be nice. :) -Rob --- Rob Prior rv7 at b4 dot ca ________________________________ Message 3 _____________________________________ Time: 01:24:40 PM PST US From: "rafael" Subject: RE: RV7-List: Flat main tire on takeoff or landing Last December, I had the right main go out on me on landing on my rv-8A. Control was not a problem, as I was able to keep the plane going down the runway. The only problem was that it was impossible to taxi or move the plane once it came to a stop. I found out the hard way the phenomena of splenation [sp], where the tube rubs against the tire and digs a hole in the tube. After that, I use plenty of talcum and keep my tires inflated at 40 psi. The problem has not returned. Cheers, Rafael -----Original Message----- From: owner-rv7-list-server@matronics.com [mailto:owner-rv7-list-server@matronics.com] On Behalf Of Jeff Hove Sent: Tuesday, September 01, 2009 4:05 PM Subject: RV7-List: Flat main tire on takeoff or landing Has anyone with a 7A (or other RV) experienced a flat main tire during takeoff or landing? Were you able to keep it on the runway? Did the wheel-pant survive? I had a left main inner-tube fail during the taxi to the runway last week and even at a slow taxi it was hard to keep it straight as the tire deflated. Had the tube let go a minute later I'd have been on the take-off roll. The tire was fine and the tube was only 2 years old and looked ok except for a quarter-sized area where the rubber had become cracked and leaky. Apparently a manufacturing defect as there were no rough spots or FOD in the tire to cause this. The way the tire bunched up inside the wheel-pant made me wonder if the wheel would continue turning and if even full opposite rudder and brake would be enough to keep the plane rolling straight had this happened at a higher speed. Thanks, Jeff Hove Flying my father's RV-A, N347RV. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv7-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV7-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv7-list Browse Digests http://www.matronics.com/digest/rv7-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.