While developing an electric bicycle, I attempted to compare energetic
performance of vehicles. Using SI units and multiplying thermal
efficiency by speed yields a performance parameter expressed in
seconds. A very similar parameter (differing by a factor of g) was
described over 20 years ago, but it was applied as a limit for all
vehicles and not as a general performance parameter. Using mass
rather than weight makes the parameter more useful and understandable,
in part because it becomes twice the cruising payload kinetic energy
divided by thermal power expenditure. A complete analysis is at the
following pages:
http://www.neodymics.com/green.htm http://www.neodymics.com/Images/EPPaper071013C.pdf
Best Regards,
--
Jeff Radtke
jr@cloudchambers.com
www.cloudchambers.com
www.neodymics.com