Thanks, Ken1784 for providing that very interesting document!

I am definately NOT a math wiz, but working thru the formula, using 40mph for indicated and 37mph for actual, converting to kilometers per hour, as 64.37kph and 59.54kph respectively, seems to give me these results: (don't know how to make the "less than or equal to" symbol, so < will mean that in this post.)


0<(40mph-37mph)<0.1X37mph+4kph
0<(64.37kph-59.54kph)<5.954kph+4kph
0<4.83kph<9.954kph

4.83kph=3mph
9.954kph=6.19mph


0 < 3mph < 6.19mph

So...my speedo fits this rule....but...what does this rule realy mean? Any math majors out there that can explain this to us math challenged folks? (or at least me)