highflight42x
Well Known Member
I've got an RV3 with 650 hours. Wood dampner strips glassed to the gear legs. I've always had some form of gear-leg shimmy (sometimes bad, sometimes not) at around 30mph on landing. The only thing that seemed to reduce it was keeping tire pressure at or below 25psi. But I could not eliminate it entirely. Until now.
I had been flying with Goodyear Flight Custom II tires over its entire service life. The tread on these tires was pretty flat-surfaced. Since the gear axels are angled downwards, the outer edge of the tire makes more contact than the inner edge.
I recently put on new tires, but this time the Goodyear Flight Special II. This tire has a noticably rounder cross-section.
After ten takeoff and landings, my gear-leg shimmy is gone! I put in 32psi. I had put the same pressure in my earlier tires for hundreds of hours, always with shimmy present on ldgs. And now: no shimmy. Must be the new tire with its rounder cross-section, that's all that I changed.
Hope this helps someone!
- Steven
I had been flying with Goodyear Flight Custom II tires over its entire service life. The tread on these tires was pretty flat-surfaced. Since the gear axels are angled downwards, the outer edge of the tire makes more contact than the inner edge.
I recently put on new tires, but this time the Goodyear Flight Special II. This tire has a noticably rounder cross-section.
After ten takeoff and landings, my gear-leg shimmy is gone! I put in 32psi. I had put the same pressure in my earlier tires for hundreds of hours, always with shimmy present on ldgs. And now: no shimmy. Must be the new tire with its rounder cross-section, that's all that I changed.
Hope this helps someone!
- Steven
