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Message: <blockquote data-quote="MDCrappie" data-source="post: 514538" data-attributes="member: 160">You've given us those speeds already. I was asking what the speed went down to when you say "Add wife and it drops to 5450rpm."What doesn't make sense to me is that (not sure of exact ratio but used a L/U ratio of 2/1 in calculations) you are going from a slip percentage of 5% to approx 15% when you add the wife AND drop the pitch.......who from the pics appears to be maybe 105lbs.Knowing the speed with the larger prop dropping to 5450 you can figure out the slip and see where the problem might be.</blockquote>