Dennis has the right idea. If you're checking the speed while sailing, it will depend on the wind strength and can't be calibrated well. If checking against a selected engine RPM, then you have a basis for comparison. Best to be in flat water as well so wave height doesn't have an effect. Clearly the effect will be more pronounced at low speeds than at higher ones. Ron Wild Cheri C&C 30-1 STL
-------------------------------------------- On Thu, 5/21/15, Dennis C. via CnC-List <[email protected]> wrote: Subject: Re: Stus-List Scum Drag To: "[email protected]" <[email protected]> Cc: "Dennis C." <[email protected]> Date: Thursday, May 21, 2015, 12:12 PM Sounds reasonable depending on the buildup. I usually keep Touché pretty clean by diving it myself. However, conflicts the last 18 months have stretched my bottom cleaning schedule. Last fall I was definitely seeing speed loss in excess of 1 knot due to a thick carpet of growth. I check it in flat water by running cruise RPM's on the engine. I know the speed I should get. If I'm slower, the bottom is dirty. Dennis C.Touché 35-1 #83Mandeville, LA _______________________________________________ Email address: [email protected] To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
