Pretty simple:
I loaded the real data to spreadsheet.
I created a column for Power = K * kts^power
And then I played with "K" and "power" and Lo and Behold, the best fit was, as expected, Power = 3, and then it was a matter of changing "K" until the best fit to the data occurred.
I have no idea about what generates the ultimate value. J
From: Thomas VanderMeulen [mailto:tvinypsi@gmail.com]
Sent: Wednesday, August 7, 2019 11:05 AM
To: matwete@comcast.net
Subject: RE: [Electric Boats] Re: New member
That looks like such useful information!
How was the constant of 37.7 watts derived, please? I assume it's related to a number of factors that are specific to a given vessel, but it would be a delight to read your views of the general approach to arriving at that constant. Specifics such as hull drag and selected propeller are two factors I imagine are big ones.
Do mind sharing some thoughts?
[-tv]
Tom VanderMeulen
Ypsilanti MI
Cape Dory 27
"Grace O'Malley"
Posted by: "Myles Twete" <matwete@comcast.net>
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