Speaking as an engineer and sailor, I quite agree but you know how engineers can sometime be.
What do call an engineer who can see the big picture? CEO :)
eric SV Meander
---In electricboats@yahoogroups.com, <rogerlov@...> wrote :
---In electricboats@yahoogroups.com, <rogerlov@...> wrote :
Speaking as an engineer, sailor, and electric boat owner - your comment is interesting but it is a stretch to make it relevant to the "rule of thumb" type of calculations in this energy per displacement discussion.
While working to develop a conceptual grasp of energy requirements we have been talking a severalfold difference in thrust energy here - so a ten percent difference in mass units doesn't much matter at this point.
Once we agree on the concept we can get to the details. That's a useful engineering trick for problem solving.
Roger L.
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