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Ed Martin's legacy is smooth. Mine has had a lot of annoying vibes as you describe but virtually all have been removed with lots of cowling interference fixes and plug change. Many pilots forget the alternator can be a wicked source of vibration and it is almost in the same plane as the prop.
The problems I had originally were in that freq range and visible at the wingtip also.
Paul
On 2013-07-25, at 9:54, Charles Brown <browncc1@verizon.net> wrote:
Has anyone definitely flown a vibration-free IO-550 Lancair (or TSIO-550) with *any* propeller? And by vibration-free, I mean it is free of low-frequency 10-20Hz stuff, not the normal noise of flying. What I'm wondering is... is it the 550, making such vibration with *any* propeller?
Charley Brown
Legacy RG 280hr
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