Similar to Roger, I have been plagued by the Cheng Shin Lamb 11-400x5 tires going flat for unknown reasons, even with the 8 ply tires.
My KR is 650 lbs empty, takeoff solo is about 925 lbs, Max gross is 1150; almost every 6-12 months on the dot, I would get a flat tire with almost no indication as to why; no hard landings, flights above gross, etc. I recently switched to Aero Classic 11x400-5 tires (see below for the link), which are rated for up to 650 lbs (vice 475 for the Lamb 8-ply tires) and 100 mph. So far, these have appeared to have solved my flat tire problems, if you don’t mind a slightly rougher taxi/takeoff/landing. https://www.aircraftspruce.com/catalog/lgpages/aero_rib_11_400.php Very Respectfully. Sam Sent from my iPhone > On Jul 21, 2023, at 9:16 PM, Lulubelle Pitts via KRnet <[email protected]> > wrote: > > > Hi Roger, > Plans built with the retractable gear? > What does yours weigh empty? > I have a plans built with retractable gear and the data plate says 540 empty, > I am going to weigh it soon to check the CG. > I haven't flown it yet, but getting close. > Limbach 80 hp. > >> On Fri, Jul 21, 2023, 8:45 PM Roger Bulla <[email protected]> wrote: >> I am running 4.00 x 5 on my Kr. My kr is plans built so it is fairly light >> by now days standards. When I fly my take off weight is around 800 lbs by >> myself. My tires are 8 ply and I run them at 50 to 55 PSI. >> I had a lot for trouble early on when I was running 35 PSI with 6 ply. They >> would go flat for discernible reason. When I would pull the tubes out and >> inflate them, I could not find a leak. When I started buying the 8 ply tires >> and inflating them to 50 PSI my problems went away. I also started using the >> Leakguard inner tubes, (Shouldn’t any inner tube be leak proof?), form >> Aircraft Spruce. >> >> Roger Bulla >> From: Stef den Boer via KRnet >> Sent: Friday, July 21, 2023 3:51 AM >> To: krnet >> Cc: Stef den Boer >> Subject: KRnet> Tires change >> >> Hi all, >> To reduce some weight I am lookig for lightweight tires (every ounce I can >> save is a bit). So I came up with the idea probably to change my tires ( so >> I have also some spare) >> I have a 5.00-5 on the main gear and on the nose gear I have 3.40/3.00. >> Maybe I can safe some weight to use for 4 ply instead of 6 ply >> >> Do some of you have ( cheap) tips? I hope you have. >> Many thanks >> >> Stef >> Steph and his dad are building the KR-2S see >> http://www.masttotaalconcept.nl/kr2 >> >> -- >> KRnet mailing list >> [email protected] >> https://list.krnet.org/mailman/listinfo/krnet >> >> Virus-free.www.avg.com >> -- >> KRnet mailing list >> [email protected] >> https://list.krnet.org/mailman/listinfo/krnet > -- > KRnet mailing list > [email protected] > https://list.krnet.org/mailman/listinfo/krnet
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