Do not find any vibration with our two blade MaxProp. The vibration rumor about two blade props used to be common when the prop was behind a keel or inside a rudder aperture. Typical boats with attached rudders; Luders, older Sparkman and Stevens, 1970's Pearsons, etc. Supposedly the blades would lose thrust whenever they got behind the keel or aperture, and bite into clear water when in the stream. A three blade prop supposedly always has one blade in the stream. I never believed the theory.
I like my two blade cause it feathers. We align the drive shaft when racing to orient the blades vertically. A three blade prop would feather but would always have more drag. Just look at them in the boatyard. Shaft angle causes at least two blades to be dragging. A three blade on a saildrive makes better sense, but I'd probably choose the two blade again. Chuck Resolute 1990 C&C 34R Atlantic City, NJ ----- Original Message ----- From: "sam c salter" <sam.c.sal...@gmail.com> To: cnc-list@cnc-list.com Sent: Tuesday, October 22, 2013 1:43:50 AM Subject: Re: Stus-List Folding/feathering Props Steve, ...and anyone else - how do you find the 2 blade and vibration? I note you had a concern; was the concern justified or does the 2 blade run OK? Anyone have any experience with 2 blade and 3 blade vibration differences? If anyone is interested, I’ve had a quote back from Max Prop already: Current prop is: 12” x 8” RH 3 Blade Recommendations are: 12” x 10” 2 blade - $1500 12” x 9” 3 blade - $2400 sam :-) C&C 26 Liquorice Ghost Lake Alberta From: Steve Thomas Sent: October 21, 2013 6:18 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Folding/feathering Props Sam, I found a used geared Gori for my 27 and it works fine in forward and reverse. I had hoped to find a 3 blade folder of some kind to minimise vibration but when I checked the manufacturers specifications there were none available in a small enough diameter. That was a few years ago so it might not be true now. Steve Thomas C&C27 MKIII -----Original Message----- From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of sam.c.sal...@gmail.com Sent: Monday, October 21, 2013 4:02 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Folding/feathering Props Good experiences; thanks for sharing. Looks like two or three endorsements for the Max Prop; about the same against the Martec; one for the Flexofold; ...and a Gori replacing a Martec! couple of questions: How big a deal is the maintenance on the Max Prop? Is it just a matter of greasing the prop every couple of years or is there more? - I pull the boat out of the lake every October; so it wouldn't be too much of a concern. I still have the old prop on the shaft. Am I correct in assuming that the taper is a standard SAE? I'm going to need to know for sure before I order. (Probably safer to remove the prop and measure for peace of mind!) Any more information / experiences / insights welcome. sam C&C 26. Liquorice Ghost Lake Alberta On 10/20/2013 7:21 PM, Tim Goodyear wrote: Sam, I have a two blade Flex I Fold, which goes nicely forwards and backwards and replaced a 2 blade non-geared Martec that went sideways in reverse and sometimes went forward if the blades opened together (even after rebuilding). The two do not compare. Tim Mojito C&C 35-3 Branford, CT On Oct 20, 2013, at 7:10 PM, David Donnelly < da...@gnuattitude.ca > wrote: <blockquote> Sam I also have the 2 blade Martec and a 26. I have not found poor performance in reverse but I don't do it a bunch either. Can push just fine going forward. David Sent from Samsung Mobile -------- Original message -------- From: Harry Hallgring < hhallgr...@icloud.com > Date: 10-20-2013 5:00 PM (GMT-07:00) To: cnc-list@cnc-list.com Subject: Re: Stus-List Folding/feathering Props Sam, I have a two blade folding Martec prop that goes 7 kts forward and four kts directly sideways in reverse. Going with a Gori this winter. Harry Sent from my iPhone 6Beta On Oct 19, 2013, at 20:21, Sam Salter < sam.c.sal...@gmail.com > wrote: <blockquote> This winters project is a folding/feathering prop. I've just sent off inquiries to: Flexofold Max Prop Slipstream Anyone got any comments/observations/likes/dislikes. Any experience good or bad with any type of folding/feathering prop would be useful. Any other manufacturers recommended. Now is your chance to get in on a real sailing topic - folding/feathering props OR rum! sam :-) C&C 26 Liquorice Ghost Lake Alberta <blockquote> _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com </blockquote> </blockquote> <blockquote> _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com </blockquote> _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com </blockquote> _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
_______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
