Hi, Dom! My car's speedo is in mph and so is my ASI. I use
rulers with feet and inches; they are the measures that make the most sense to
my mind. Those I can picture, with the others I have to make a mental conversion
into the ones I know. I think it was totally stupid to start using knots for
measuring speed. It had nothing to do with what people in this country used on a
day-to-day basis. Our vehicles we use for our transportation are in mph or kph;
if it exists, I've never seen a car speedo calibrated in knots! The planes
I started on were in my old comfortable mph. I know the conversions to knots,
ft/sec, km, cm, mm, hp, torque, BTU, joules, rad/sec, UTC, UT1, sidereal
rate, F number, etc, etc, etc! But when I fly, I want to concentrate on the
familiar, not "Let's see, 1.151 statute miles/nautical mile." If you're trained
on nautical miles per hour, and that's what you are comfortable with, then by
all means use it. But since we have so many different measuring systems in use
around the world, it seems to me it would behoove anyone who wants to progress
in aeronautical knowledge to become familiar with the conversion factors.
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