Matthew, They did the same for me in 2011 and 2016. For example here's the 2016 reply:
"With a Universal M25XPB, 26/3000 ( gear reduction ratio 1:2,05 ) we would recommend a 2-blade 16x12R propeller for your C&C 35mki. Please confirm the HP/RPM as this engine comes in different variants concerning HP and RPM." The 2011 reply had the same information attached from the submission form. "Thank you for your inquiry regarding a Flexofold propeller for your C&C 35 Mark I. For your boat, with that Universal 25XPB engine, I would recommend a 15 x 11 RH 2-blade Flexofold ($1095 + shipping) Adding the racing blade option for that prop the cost of the prop would come up to 15 x 12 RH or ($1305 + shipping)" So which do you believe? Dennis C. On Mon, Dec 18, 2017 at 11:33 AM, Matthew L. Wolford via CnC-List < cnc-list@cnc-list.com> wrote: > Flexofold has gotten better. When I replaced my prop a year ago, they > wanted to know not only shaft size, but also information about my engine > and transmission. This is how they responded: > > > Hello Matthew > > > > Thank you for the missing gear reduction. > > > > With a Westerbeke W40, max rated 37hp/3000rpm (V-drive) ( gear reduction > ratio 1:2,00 ) we would recommend a 2-blade 17x12L or a 3-blade 16x12-3L > propeller for your C&C 42. > > > I ended up getting the two-blade and am happy with it. The best part is > that it’s no big deal if I forget to send somebody down below to turn the > shaft when we go racing. > > > *From:* Dennis C. via CnC-List <cnc-list@cnc-list.com> > *Sent:* Monday, December 18, 2017 11:24 AM > *To:* CnClist <cnc-list@cnc-list.com> > *Cc:* Dennis C. <capt...@gmail.com> > *Subject:* Re: Stus-List PROPELLER PITCH > > Take prop manufacturers recommendations with a grain of salt. Years ago I > requested a recommendation from Flexofold. The rep at the time was Chuck > Angle who was highly regarded. He said he didn't have a good prop > recommendation for my 35-1. :) I went with Martec. > > In 2011, I repeated the request and got a recommendation for a 15 x 12. > In 2016, I again asked and they said 16 x 12. > > Currently, Touche' is swinging a 14 x 14 Martec which seems a bit under > pitched (or too small a diameter). I can run at 6.4-6.5 knots at cruise > rpm (80% max, 2450 rpm) and flat water, no wind. > > On my list for next year's haul out is to measure and document > (photograph) the prop tip clearance distance. I will also measure the hub > and swing pin location. The swing plane for different props varies. > > I think prop selection is part science, part art and a bit of voodoo. > > Dennis C. > Touche' 35-1 #83 > Mandeville, LA > > >> >> >> > > ------------------------------ > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > >
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