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In a message dated 10/31/2010 5:11:51 A.M. Eastern Daylight Time,
dbartsch2236@hotmail.com writes:
Can anyone describe how a speedo speed indicator system works Hi David. I'm not sure what a "speedo" refers to here but for surface boats
that measure the speed in knots, there's usually a small paddle wheel inset into
the hull that spins as the water passes over it.
Most I've seen ( on sail boats ) use magnetics to send the signal through
the hull to a tachometer like device
that in turn sends the speed signal to the little gage on the dash.
The paddle wheel is VERY small, like 1/2 inch diameter.
Frank D.
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