Hi Jim, Thanks for your numbers. Based on the manual, an 18 degree blade angle setting provides a 10.4 pitch. Is your prop set to 18 degrees?
Reference the manual at this link: https://www.pyiinc.com/downloads/max-prop/max-prop-2-blade-classic-instructions.pdf Chuck > On 12/18/2020 12:38 AM Jim Watts <[email protected]> wrote: > > > Sounds wrong. We're 17X10 with the 2-blade max prop, same engine and > gearbox. I would check those numbers again. Don't confuse blade angle with > pitch. A 20° blade angle on the 17" prop is equivalent to a pitch of 11.6, > which still sounds a little steep. > > Jim Watts > Paradigm Shift > C&C 35 Mk III > Victoria, BC > > On Thu, 17 Dec 2020 at 13:27, Glen Dickson < [email protected] > mailto:[email protected] > wrote: > > > > > > Was the 22 degree pitch on the Max Prop recommended by the > > distributor? I too have faith in Fred Hutchinson’s calculations. He’s > > always been spot on. If someone didn’t work out that 22 degree pitch based > > on prop and reduction I’d suggest it’s overpitched (as one could easily > > guess). > > > > > > > > Glen Dickson > > > > Nomad I 1990 C&C 34+ > > > > > > > > Go with whatever Fred Hutchison at PYI recommends😊 > > > > > > > > From: CHARLES SCHEAFFER <[email protected] > > mailto:[email protected] > > > Sent: December-17-20 4:56 PM > > To: CNC boat owners, cnc-list <[email protected] > > mailto:[email protected] > > > Subject: Stus-List Best Pitch for 2 blade 17" Max Prop 36ft C&C > > > > > > > > Does anyone with a MaxProp know their pitch setting? We're trying > > to set a two blade 17" MaxProp on a 36 ft sailboat with Yanmar 3GM30F > > engine w 2.6:1 reduction? > > > > > > > > Thanks, > > > > Chuck Scheaffer Resolute 1989 C&C 34R Pasadena Md > > > > > > > > > > ---------- Original Message ---------- > > > > > > From: Blair Clark <[email protected] > > > mailto:[email protected] > > > > > > > To: [email protected] mailto:[email protected] > > > > > > Date: 12/12/2020 2:16 PM > > > > > > Subject: deciding on proper pitch for 2 blade 17 inch Max Prop > > > > > > > > > > > > > > > > > > Hello Group, > > > > > > > > > > > > We have a 1990 C&C 34 +. > > > > > > > > > > > > Coincidence is powered by a 3GM30F Yanmar with a 1 1/8 shaft > > > and a Kanzaki, KM3P Mechanical gearbox. Serial no(s): 17745. Gear ratio: > > > 2.61:1 > > > > > > > > > > > > > > > > > > I recently purchased a 2 Blade 17 inch Max Prop. It comes > > > with a 22 degree pitch. > > > > > > > > > > > > When I was communicating with PYI they had recommended a 2 > > > Blade 17 inch 20 degree pitch if I went with their new propeller. > > > > > > > > > > > > Does anyone have any thoughts/experience regarding 22 degree > > > pitch vs 20 degree? > > > > > > > > > > > > Thank you, > > > > > > > > > > > > Blair > > > > > > Coincidence > > > > > > 1990 C&C 34 +(902) 233-1684 > > > > > > > > > > Thanks to all of the subscribers that contributed to the list to > > help with the costs involved. If you want to show your support to the list > > - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks > > - Stu > > > > Thanks to all of the subscribers that contributed to the list to > > help with the costs involved. If you want to show your support to the list > > - use PayPal to send contribution -- https://www.paypal.me/stumurray > > Thanks - Stu > > > > > Thanks to all of the subscribers that contributed to the list to > > help with the costs involved. If you want to show your support to the list > > - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks > > - Stu >
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
