Ron
I have a 38 foot Mk II with a 3gm30 engine (27 hp). We have a 2 blade
feathering max prop and at 3000 rpm we get about
6.5 to 6.75 kts. You should check what your pitch is set to and possibly
re-adjust it. It is not that hard to do.
Gary Kolc
"Liberty" Apponaug RI.
---- Josh Muckley via CnC-List <cnc-list@cnc-list.com> wrote:
> Hey Ron,
>
> I think you meant feathering prop right? I don't recall PYI making a
> folding prop. And you're right the 2 blade just doesn't transfer the power
> to the water as efficiently. It is likely that the hull clearance has
> limited the size of your prop to 16". In this case more pitch is the only
> way to get more thrust from the prop. This could cause the engine to not
> reach full rated speed. Remember frequently running the engine at ~80%
> load is best for it.
>
> Josh
> On Jan 12, 2015 11:42 AM, "Ron Ricci via CnC-List" <cnc-list@cnc-list.com>
> wrote:
>
> > My C&C 37+ has a 30 HP Yanmar 3HM35F with a two-bladed folding PYI Max
> > Prop. I don't know the diameter or pitch settings. At around 2500 rpm,
> > the boat can make about 5 knots, beyond that I just get more noise at max
> > engine speed of about 3000 RPM. My feeling the prop is not very efficient
> > but probably presents very little drag when sailing. If I wanted the boat
> > to go faster on the engine a new prop would be in order. The engine is
> > fine for my boat.
> >
> >
> >
> > Regards,
> >
> > *Ron*
> >
> > Ronald V. Ricci
> >
> > S/V Patriot
> >
> > C&C 37+
> >
> > Bristol, RI
> >
> > ron.ri...@1968.usna.com
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > *From:* Danny Haughey [mailto:djhaug...@juno.com]
> > *Sent:* Monday, January 12, 2015 7:10 AM
> > *To:* cscheaf...@comcast.net; cnc-list@cnc-list.com
> > *Subject:* Re: Stus-List C&C 37+ engine size
> >
> >
> >
> > I think my point is;
> >
> >
> >
> > Where we sail there are some pretty good currents and the chop picks up
> > quite often. Sometimes, you have to make it home heading into both.
> > That's when you want the extra hp. We sometimes have guests that get a
> > little nervous when the conditions get exciting and we try to get them in
> > as quickly as possible. Sure, you can move along at hull speed in
> > favorable conditions but, the only time I'd be able to notice that the
> > stern dug in a few inches would be in the harbour, sometimes. We almost
> > never experience flat water and are typically dealing with a 3 to 4 knot
> > current. Sometimes it is our favor and usually try to time our trips so it
> > is. But day sailing, I don't really care as much. I sometimes could only
> > get 3 knots under full power trying to round a mark to get into a harbour.
> > That can be a little unnerving.
> >
> >
> >
> > Danny
> >
> >
> >
> >
> >
> > From my Android phone
> >
> >
> > -------- Original message --------
> > From: Chuck S <cscheaf...@comcast.net>
> > Date: 01/11/2015 11:45 PM (GMT-05:00)
> > To: Danny Haughey <djhaug...@juno.com>,"CNC boat owners, cnc-list" <
> > cnc-list@cnc-list.com>
> > Subject: Re: Stus-List C&C 37+ engine size
> >
> > ". . . bigger is better. . . "? Is a bigger booty better? Will a bigger
> > anchor make my sailboat go faster?
> >
> > What helps sailing is "no engine". Light means flight.
> >
> > Research the brochures and look to buy a boat with the "designed right
> > size engine", not bigger. An upgrade would be a smaller diesel w a turbo.
> > Just sayin.
> >
> >
> >
> > Chuck
> >
> >
> >
> >
> > ------------------------------
> >
> > *From: *"Danny Haughey via CnC-List" <cnc-list@cnc-list.com>
> > *To: *cnc-list@cnc-list.com
> > *Sent: *Sunday, January 11, 2015 7:54:45 AM
> > *Subject: *Re: Stus-List C&C 37+ engine size
> >
> >
> >
> > Ok well, I guess it is adequate then. I just tend to see 40 hp engines in
> > most 40 footers.
> >
> >
> >
> > Maybe not be the ideal and will be a bargaining point if it comes to that.
> >
> >
> >
> > Bigger is better in this instance I think...
> >
> >
> >
> > Thanks for the insights guys!
> >
> >
> >
> > Danny
> >
> >
> >
> >
> >
> > From my Android phone
> >
> >
> >
> >
> > -------- Original message --------
> > From: allen via CnC-List <cnc-list@cnc-list.com>
> > Date: 01/10/2015 3:53 PM (GMT-05:00)
> > To: Robert Abbott <robertabb...@eastlink.ca>,cnc-list@cnc-list.com
> > Subject: Re: Stus-List C&C 37+ engine size
> >
> >
> >
> > Our 30-2 has 20 hp Universal and easily reaches hull speed in light to
> > calm conditions. Originally it was powered by an 18 hp Universal that
> > netted 16.
> >
> >
> >
> > Allen Miles
> >
> > s/v Septima
> >
> >
> >
> > *From:* Robert Abbott via CnC-List <cnc-list@cnc-list.com>
> >
> > *Sent:* Saturday, January 10, 2015 3:41 PM
> >
> > *To:* Danny Haughey <djhaug...@juno.com> ; cnc-list@cnc-list.com
> >
> > *Subject:* Re: Stus-List C&C 37+ engine size
> >
> >
> >
> > Danny:
> > Some say if you have one hp per foot of boat, you are adequately powered
> > for a sailboat. A 35 hp diesel in a 37+ seems adequate to me.
> >
> >
> >
> > Rob Abbott
> > AZURA
> > C&C 32 - 84
> > Halifax, N.S.
> >
> >
> >
> >
> > On 2015/01/10 12:30 PM, Danny Haughey via CnC-List wrote:
> >
> > Hi Guys,
> >
> >
> >
> > I'm eyeing a 1989 37+ but it has a 35 HP universal diesel. That, seems
> > kind of small for a nearly 40' boat. doesn't it?
> >
> >
> >
> > Danny
> >
> >
> >
> >
> > ------------------------------
> >
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