> Hi Jim, 
> 
> Thanks for this wonderful unit of energy. I will use it in my next
> technical presentation. It beats out my previous favourite, firkins per
> fortnight (f/f).
> 
> Firkins per fortnight, a unit of volume flow, is most often used as a
> measure of beer consumption by engineering students. 1 f/f = 2.9 liters per
> day.
> 
> Been there, seen it, done it!
> 
> Roger Bailey
> Walking Shadow Designs
> N 51   W 115

You must be using imperial firkins (at least that's the term we use in
the U.S.).  In an idle moment I decided to check this out using the
UNIX 'units' program and was initially confused:

        % units
        you have: firkins / fortnight
        you want: liter / day
                * 2.433479e+00
                / 4.109343e-01

Then I was inspired, recalling the difference between imperial gallons
and gallons

        you have: imperial firkins / fortnight
        you want: liter / day
                * 2.922487e+00
                / 3.421744e-01

and managed to get your conversion factor of 2.9.

The firkins / fortnight unit reminded me of a unit of velocity someone
once told me he especially liked: furlongs / fortnight.

        you have: furlong / fortnight
        you want: meter / second
                * 1.663095e-04
                / 6.012885e+03
        you have: furlong / fortnight
        you want: meter / day
                * 1.436914e+01
                / 6.959357e-02

Jim
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