The EB-6 calculator!!?? (a.k.a. Wiems Plotter???)

Good Lord. I used one of those in Undergraduate Pilot Training in the good
ol' U.S.A.F back in 1965-66. After reading this message thread I went up in
the attic and 30 minutes later I had an EB-6 in my [dusty] hand. I also
found a Jeppsen battery-operated hand-held calculator that we B-52 pilots
somtimes used. You won't believe this but the two little button batteries
were still good!!! Amazing. That was 30 years ago!!!!! (The calculator was
actually made by Sharp Electronics of Japan (of course) then re-branded by
Jeppsen, then re-re-branded by the U.S.A.F. Surely a collector's item.

Anyway, the issue of MPH vs. KNOTS vs. KPH. Forget the KPH; it's merely
speed in kilometers vs. miles. A knot is one nautical mile/hr or about 1.15
statute miles/hr.

So 145 kts == 145 x 1.15 == 166.75 miles/hr (for example)
or
200 mile/hr == 200 x .87 == 174 kts/hr (for example)

Knots are preferred since a nautical mile is based on one degree of
longitude -- which is the same world-over.

I think!! LOL

Dave Pitzer
CFI/CFII



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