Dan Heath wrote: > Did anything ever come of the harmonic checks that they ran on your Corvair > engines at the last Gathering?
Not much yet. John's still working it. These were just vibrations in three axis, not torsional vibration tests. But one thing he has said is that it appears that the prop is by far the biggest contributor to vibration...which is one more reason I suspect my prop was a lot of the problem. The old engine was perfectly balanced (dynamically), but I never thought it was as smooth as it should be. The current 2700cc engine was simply "thrown together" (although I did cc the chambers to within .1cc of each other or so) and with the new Sensenich prop, it runs much smoother. I'm beginning to think the majority of my problem was the prop not being symmetrical (although it was balanced). Then the forces were magnified somewhat more by the prop extension. Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net --------------------------------------------------------------
