I have a Martec folding prop which when I come off the mooring operates fine. However if I slow down or stop to pick up crew at the dock something happens and it vibrates like crazy. It's got to be that one of the blades folded and the other didn't and when I accelerate it still vibrates as though the blade that folded does come out again. Both blades do deploy when I put it in reverse but then one folds when I go into forward. Is this how these folding blade props act when they have too much play? If anyone has had that happen and then had it reworked by Martec did this problem go away?
Dave Saltaire C&C 35 Mk3 From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Jean-Francois J Rivard via CnC-List Sent: Tuesday, July 08, 2014 1:14 PM To: cnc-list@cnc-list.com Subject: Stus-List Folding prop horizontal vs vertical plane.. My prop is folding, not feathering. On a non-geared folder If you have the blades on a vertical plane, the lower blade will hang down from gravity / add additional drag. On horizontal plane they fold together completely (Looks like a seaweed) and minimize drag. If it's a geared folder, they will fold completely no-matter the angle That's per Martec's instructions. See comment about the Pivot point (Shaft) being set vertical (Making the blades horizontal) http://www.martec-props.com/install_eliptec.htm As for the rebuilds, they are about a hundred bucks with Martec. They re-drill the hub, install a larger diameter shaft, re-drill the blades, balance and polish the whole thing. The prop looked brand new. Call the MFG to get an idea if you are out of specs. My blades wiggled more than 1 inch at the tips so it was pretty obvious.. -Francois Rivard 1990 C&C 34+ "Take Five" Lake Lanier, Georgia.
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