I can say that going from a two blade Max-Prop to a 3 blade Gori I have way less vibration. That is why I did it. If I was not racing I would have gotten a 3 blade Flexofold.
The Max Prop seems to have a Chop-Chop sound at certain RPS’s, which I attribute to the flat blades, altho I am no expert. Sounded like cavitation. Also, the 3 Blade is supposed to break up the vertical laminar flow coming off the keel and strut, at least according to what I read on the subject. Bill Coleman C&C 39 Erie, PAanimated_favicon1 From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Andrew Burton via CnC-List Sent: Thursday, June 09, 2016 11:03 PM To: cnc-list@cnc-list.com Cc: Andrew Burton Subject: Re: Stus-List Propeller - flexofold Bruno, did you find there was less vibration with the three blade prop? Andy C&C 40 Peregrine Andrew Burton 61 W Narragansett Newport, RI USA 02840 http://sites.google.com/site/andrewburtonyachtservices/ +401 965-5260 On Jun 9, 2016, at 22:15, Bruno Lachance via CnC-List <cnc-list@cnc-list.com> wrote: Mike, The 3 blades Flexofold, 15" / 11" was 1 520 US $ two years ago, including the 50$ freight charge. Plus the It replaced an original Martec fixed blades that was 16" / 10" pitch. Envoyé de mon iPad Le 7 juin 2016 à 08:21, Hoyt, Mike via CnC-List <cnc-list@cnc-list.com> a écrit : Bruno What did they charge you for that prop? Mike From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bruno Lachance via CnC-List Sent: Monday, June 06, 2016 7:00 PM To: cnc-list@cnc-list.com Cc: Bruno Lachance Subject: Re: Stus-List Propeller Robin, I do remember the original fixed blades prop of my 33 mk II with original Yanmar 2gmf was 16", will have to check for the pitch but I think it is 12. I will be back home in two days to verify that. I ordered a Flexofold 3 blades and they recommended 15" /9". The blade area is larger and I think it is too much prop for my boat, I can't push the engine over 2800. But it is a good prop and I deal with it. Bruno lachance Becassine, 33 mkIi New Richmond, Qc Envoyé de mon iPad Le 5 juin 2016 à 22:29, Robin Drew via CnC-List <cnc-list@cnc-list.com> a écrit : Thanks. I just bought the boat and I'm pretty annoyed but sure the problem is that it's worn and needs maintenance. I'm planning on removing it and putting a simple 2 blade prop on, at least for now. It's hard to get info about the size and pitch specs. However, I found a website in BC that has a prop calculator and it gave me 15" with 9" pitch for my boat (CNC 33/2), engine and transmission. Does this sound right? Any comments? Robin Drew Mobile: +1 514 4632060 Steve Thomas C&C27 MKIII Port Stanley, ON ----- Original Message ----- From: Robin Drew via CnC-List <mailto:cnc-list@cnc-list.com> To: cnc-list@cnc-list.com Cc: Robin Drew <mailto:drew.robi...@gmail.com> Sent: Saturday, May 28, 2016 17:26 Subject: Stus-List Propeller I have just purchased a C&C 33 mark 2 with a 2GMF engine. It has a clamshell-type folding propeller that, once in gear, is causing significant vibration above idle speed. What could be causing this? Robin Drew Mobile: +1 514 4632060 "The only thing we have to fear is fear itself" - FDR _____ _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated!
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