swinn Posted August 29, 2005 Share Posted August 29, 2005 In the Cozy IV plans, chapter 23, page one, the 'Engine Selection' section talks about the recommended Lycoming engines. I am curious why there is advice against models with the '6th and 8th order counterweights'. Is there a problem with these engines that make them unsuitable for the Cozy? Quote --Scott LongEZ #159 Finishing & Engine install Blogged at: http://www.briansplane.com Link to comment Share on other sites More sharing options...
Wayne Hicks Posted August 30, 2005 Share Posted August 30, 2005 Here's what the Lycomoing rep at Oshkosh told me: The 6th and 8th order counterweights are included on some constant speed prop applications to minimized the harmonic interactions between the prop and the engine. These counterweights must be tuned, i.e. installed very correctly. Else, they can get out of whack a bit and exacerbate the problem. Otherwise, they simply add weight. I have an IO-360 with the 6th and 8th order counterweights. I asked if I should remove them altogether. The Lyc rep said no, leave them in there. Quote Wayne Hicks Cozy IV Plans #678 http://www.ez.org/pages/waynehicks Link to comment Share on other sites More sharing options...
swinn Posted August 31, 2005 Author Share Posted August 31, 2005 Thanks for the answer. I've got a counterweighted IO-360 destined for the back my Long EZ. Figured that whatever applied to the cozy would apply equally to the Long. Quote --Scott LongEZ #159 Finishing & Engine install Blogged at: http://www.briansplane.com Link to comment Share on other sites More sharing options...
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