Hi Dave,

        Well, you asked:
What's the conversion factor to change miles per hour to furlongs per
fortnight?

Terms:
1 Mile = 5280 feet
1 furlong = 660 feet
1 fortnight = 24 x 14 = 336 hours

Calculations:
1 mile/hr = 5280 feet/hour

1 furlong/fortnight = 660 feet/336 hours = ~1.96 feet/hour

Conversion:

For Furlongs/Fortnight to Miles/Hour   1.96/5280 = ~.00372   (multiply
by this factor)

For Miles/Hour to Furlongs/Fortnight  5280/1.96 = ~2688      (multiply
by this factor)

I wonder about the availability of the proper speedometer for this
application, and where are you going, anyway?

Chuck Hill