flyrotary@lancaironline.net Mailing List Archive

ask any middle distance runner what his 5K or 10K times are and the next, logical?, question always is "how many minutes per mile is that?"! it's going to take a generation to change, just like my parents and recycling, "why? they take everything we put in the trash can...."

----- Original Message -----

From: George Lendich

To: Rotary motors in aircraft

Sent: Tuesday, November 28, 2006 11:56 PM

Subject: [FlyRotary] Re: Metric

Jarrett,

When traveling around the US on my 'Aussie speedo metered' (metric) Harley, I had to mentally calculated all speeds on the go.

I found the easiest system was using was using the 5/8 fraction i.e. 100 k's and hour are approximately 60 miles an hour ( 100 k's/8= 12 approx x 5 = 60mph) I don't try to go into decimal points when doing it in my head, as all I want is the approximate whole number.

I learned how to do this as I have an old 73 Landcruiser, with miles an hour Speedo - the system is the same but inverted i.e. 8/5 this.e. ( 60mph/5=12x 8 = 96 K's)