Calibration with two speed loggers.
We've upgraded to a racing boat from a cruiser racer, installed a H5000 and are having issues with calibration. When changing our TWA, the TWD isn't changing, but set/drift is big time. I think that the calibration numbers I've been using to get TWD right are masking the fact that perhaps our BSP isn't right in the first place.
We have two loggers and often do calibration runs, under motor, locking the system to just the one logger at time for multiple runs. Those numbers generally agree with the prior numbers each time. But I wonder if as soon as we introduce heel, the wash over the paddle wheels is changing things and how we could go about intelligently accommodating for that? (We do the compass calibration during the same sessions.)
The owner thinks we should replace the paddle wheels, as they're from the older H2000, but I'm not convinced that we need to spend the money.
Any suggestions? Might there be a way that I could look at the log of our sessions to work out how I could tweak the numbers?
Thanks for response Campbell. I ended up traveling and not getting back to this for some time. With the boat now out of the water, it's immediately apparent that there was a speed sensor problem with the wheel not exposed properly...
Plus the calibration number for both loggers had reset to the same value, presumably through human error, but I'm not sure how.
Will get back to this in a few weeks.