So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List < cnc-list@cnc-list.com> wrote: > There are (were) some generator knotmeters. Coquina came with one when > we bought her. If memory serves, it topped out at 10 or 12 knots and it > was always fun to peg it :) > > Joe > > Coquina > > On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: > > Have you looked at this web page? This takes yo to the manuals for SR > > Mariner Instruments (since 1973): > > https://srinstruments.com/manuals#mariner_manuals > > > > The only SR Mariner Knotmeter I ever worked on (on a friend's C&C 35 > > Mk.I 1973) was self powered. In other words, no external power was > > needed (except for the backlight for the instrument face for night > > use), the paddle-wheel seemed to be a generator. > > > > More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf > > > > Ken H. > > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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