On 18 October 2014 15:37, Bob Blick <bobblick@ftml.net> wrote:

> That's some serious hypermiling for a Miata.


(I know you know that )   Aerodynamic losses predominate at more than a
lope and increase with the cube of air speed, so low speed can help heaps.
You lose one power of V when considering energy per distance, as t
increases inversely with V but its still a square law with respect to
energy per distance.

FWIW wind power loss =3D 0.6  k A V^3 at sealevel where K is drag coefficie=
nt
=3D 1 for a flat plate and somewhat less with care and luck.

Leading factor of  0.6  works for SI / ISO  units (=3D 0.5 x air_density in
compatible units =3D 1.2 kg/m^3 for air at sea level).






             R
--=20
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