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5224Re: [campernicholson] Speed under motoring (4.7 knots at 2.000 rpm)

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  • Peter Jørgensen
    Jul 30 1:40 PM
      It was a lot off hard work. It took me nearly all vinter. Because of the deep V-shape of the hull I had to extende the grp platform for the engine and I had to close the hole from the schaft and the hole from the schaftsuporter (the thing that holdes the schaft on the outside. Not sure what it is called)
      I would gladly send you some pictures of this operation (I had taken plenty ;-) )
      The hard work did pay off and now she is a sweethart to steer and sail under power. Not to mention the silence.... You can hear the engine of course but, now it`s not anoing.
      How do You like the steering cabability with the engine You got now....? before it was only very littel water from the proppeler that hit the rudder because the schaft had a very deep angel.
      From: Jean-F. Regnard <jfregnard@...>

      To: campernicholson@yahoogroups.com
      Sent: Fri, July 30, 2010 10:10:57 PM
      Subject: Re: [campernicholson] Speed under motoring (4.7 knots at 2.000 rpm)


      Thank you for this information. I know there is something wrong with the engine of this wonderful yacht I have just acquired (CN35 # 207) ...
      What is a big job changing the engine below the cockpit ?
      Jean-Francois REGNARD

      Skype ID : jf.regnard
      Ph : 33-613-176-149
      Tel : 02-96-91-40- 07

      Adr : Park Ar MenRu
      Chemin du Phare
      Ploumanac'h, 22700 Perros-Guirec

      From: Peter Jørgensen <peterschoett@ yahoo.com>
      To: campernicholson@ yahoogroups. com
      Sent: Fri, July 30, 2010 9:02:49 PM
      Subject: Re: [campernicholson] Speed under motoring (4.7 knots at 2.000 rpm)


      About the speed on your Nic, we had just returned from our holiday and the last 2,5 hours we were going by motor.
      This vinter we had installed a new Yanmar 3JH4 with a SD50 saildrive. At exactly 4,7 knots, the engine runs 1100 rpm. The only thing is that the mechanical log was stopped so I dont know what way the stream went but, this is now fixed and I will gladly write down the exact figures next time we sail out.
      I have to tell you that I had put on a Brunton Autoprop and this is the absolut best thing i´ve bought..... full pitch at rewers and the best, no sidewalk at all. Before we had a Watermota Seapanther with a Hurth V drive, and back then you could talk about sidewalk and poor steering in the tight marinas.
      When we runs 6 knots the engine runs around 1400 rpm.
      CN 187 / Addiena      

      From: JFR <jfregnard@yahoo. com>
      To: campernicholson@ yahoogroups. com
      Sent: Sat, July 3, 2010 2:53:19 PM
      Subject: [campernicholson] Speed under motoring (4.7 knots at 2.000 rpm)


      My CN has a 35hp Piranha engine with a two-blade folding propeller. With revs at 2.000 rpm, she sails at 4.7 knots in a flat sea and virtually no-wind. Such a speed seems quite slow to me. Would anyone have figures that I can use as a benchmark ? Should I put in a 3-blade regular propeller ?
      Any advice will be welcome,

      JF Regnard

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