---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Wed 11/07/12: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:02 AM - Landing Gear Shimmy on RV8A (Ian Brown) 2. 07:53 AM - Re: Landing Gear Shimmy on RV8a (Robin Marks) ________________________________ Message 1 _____________________________________ Time: 05:02:11 AM PST US From: Ian Brown Subject: RV-List: Landing Gear Shimmy on RV8A Looking at your video, that very slight hesitation at the beginning, I'd say your bearings are too tight. Compare with the nose wheel video at http://www.eaa538.org/images/nosegear.wmv Ian Brown ________________________________ Message 2 _____________________________________ Time: 07:53:48 AM PST US From: Robin Marks Subject: Re: RV-List: Landing Gear Shimmy on RV8a Greg, as far as mounting camera I use the suction mount plus safety wire to screws with a sandwich of washers to protect paint. So far suction has hel d well. Robin Sent from the new iPad On Nov 7, 2012, at 7:49 AM, "mr.gsun@gmail.com" < mr.gsun@gmail.com> wrote: My thought when I saw your video was that something is loose. Did you jac k it up and really wiggle everything good? I run 35-37 psI and have a smal l amount of shimmy sometimes when increasing taxi speed. If I touch the br akes, it goes away and all is well. I found that lower pressure helps my landings, eliminates shimmy but rubs o n the wheel pants on touchdown. Rubbing on the sidewalls of my expensive M ichelin tires bothered me. How do you attach your camera to the wing? I see the suction cups for the GoPro camera but just don't trust that. Do you back out a few screws from the wing and screw down a mounting plate? Greg do not archive On Tue, Nov 6, 2012 at 12:54 AM, Charles Brame > wrote: I had similar shimmy problems on my 6A. I tried balancing the tires with li ttle or no help. Van's answer was to reduce the tire pressure. As I remembe r, Van's recommendation was about 20 psi. My shimmy stopped at 25 psi and I have used that ever since. I have found that lower to higher ambient tempe rature will change the tire pressure enough that the shimmy will sometimes return. Likewise, my 25 psi flatland tire pressure didn't work in Denver, a nd lowering the tire pressure to less than 20 psi solved that. Another possible cause is the axle nut(s) being too tight. Make sure all th e tires will spin freely with the airplane jacked up. I had that problem wi th the nose gear which caused the nose gear to bounce vertically on landing . Basically, the axle was too tight due to the design, and the tire wouldn' t freely rotate more than 1/2 turn. I went to a Grove wheel and axle and t hat solved that problem. Charlie Brame RV-6A N11CB San Antonio ----------------------------------------------------------- Time: 03:08:03 PM PST US Subject: RV-List: Landing Gear Shimmy on RV8a From: "fastpilotrv8" > I on my 2002 RV8a has had the landing gear shimmy has gotten much worse in the last 6 flights . I am running 45 lbs air , no flats spots . The mains are really shaking a lot. anyone with Ideas please watch the video on You Tube and please give me your Ideas http://www.youtube.com/watch?v=_HrcTKt3zBc my email is fastpilotrv8@aol.com _blank">www.aeroelectric.com .com" target="_blank">www.buildersbooks.com ="_blank">www.homebuilthelp.com _blank">http://www.matronics.com/contribution t="_blank">http://www.matronics.com/Navigator?RV-List tp://forums.matronics.com rsbooks.com> m> ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.