Thumb-end Navigation.
"Oh what a tangled web we weave/When first we practise to deceive" (or to set mathematical problems !)
8 miles @ 150 mph is 20 miles, or 20 x 5280 x 12 in, or 1,267,200 in. (no argument about that).
Dividing by Danny's 1.25 in horny thumb-end gives 1,013,760 thumb-ends (fair enough ?)
Dividing into a 1:1,000,000. scale, the difference appears (as above) to be 1.35733 %. At 16 miles/in (811,008 t/es) it would be 23.3%. At 15 miles/in (760,320 t/es) - 31.5%. (but that then would be very close to a 1:750,000 scale @ 1.35733 %). Was there such a map scale ? - I ask in all ignorance). If so, the one-in- a million and the 15mi/in maps must be joint "proxime accessits". Fareastdriver, awfully sorry, but have to withdraw my previous award of joint winner to 16miles/in. (I'd inexcusably forgotten to include the thumb factor in that calculation).
Wish I'd never started ! (Einstein, thou should'st be living at this hour !) .............D.
Yamagata Ken. Yes, DR is Dead Reckoning..........D.
Xercules,
Kind words much appreciated. I was in ATC at Leeming '67 - '72 (last posting before retirement). W/Cdr Ramus was the O.C. Flying Wing/CFI, S/Ldr Angela (ex-Red Arrow) one of the Sqdn C.O.s, S/Ldr "Harry" Talton SATCO. You may have heard my dulcet tones on air.
Danny.
Last edited by Danny42C; 26th Oct 2012 at 01:10.
Reason: Typo and Spelling.