Another key indicator that the engine is straining besides black smoke is engine temperature, which should be 195 max. Diesels prefer to run loaded up and warm, but we throttle back to keep the temperature right.
Another note: RPM meters are not always accurate. A hand held tachometer proved our OEM was off by several hundred revs. I too see a hull speed drop off in short waves and headwinds. Above winds of 20 knots, our hullspeed motoring in short seas typically drops a lot. We try to sail as much as possible in those conditions, but sometimes need to get around a sea buoy when motoring offers a quicker option straight upwind. The chop affects sailing speed too, and motoring 3 knots straight upwind can be quicker and easier on guests than sailing more distance at 5 kts in building seas. Of course it all depends on schedules and mood of the crew. Chuck Resolute 1990 C&C 34R Broad Creek, Magothy River, Md ----- Original Message ----- From: "Josh Muckley via CnC-List" <[email protected]> To: "Ron Ander" <[email protected]>, "C&C List" <[email protected]> Sent: Saturday, January 3, 2015 4:07:37 PM Subject: Re: Stus-List Adjustable Prop Generally I would say that you should worry less about max boat speed and more about matching max rpm to full load. You should reach max rated rpm and not blow black smoke. All of this assumes a clean prop and bottom. Josh Muckley S/V Sea Hawk On Jan 3, 2015 3:43 PM, "Ron Ander via CnC-List" < [email protected] > wrote: I have a Vari Profile adjustable pitch feathering propeller. I am definitely in need of an adjustment in the forward position as I am only able to motor at about 5 knots on flat waters at about 2300 rpm. In one particularly strong blow I was unable to make any headway into the wind and waves. I had to bear off to gain some momentum and wiggle up to gain way. My theoretical hull speed is 6.5 knots. It would make sense to me to adjust the pitch to give me more speed and see how it performs this year. Is this the right approach or does anybody have better advice? Thanks, Ron Ander E.Y.C. C&C 29 Mk 2 1986 “Alchemist” _______________________________________________ This List is provided by the C&C Photo Album. Please donate to the C&C Photo Album to keep this list free for all subscribers. Email address: [email protected] To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album. Please donate to the C&C Photo Album to keep this list free for all subscribers. Email address: [email protected] To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
_______________________________________________ This List is provided by the C&C Photo Album. Please donate to the C&C Photo Album to keep this list free for all subscribers. Email address: [email protected] To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
