A further item from the past:
Google
"fuel economist"flight 75
When fuel was cheaper, I HAD been taught that " The Cheapest Thing in Aviation is PETROL." And pressure pattern looked like the near future.
At Majendie's lecture on "Comet Navigation" to the Institute of Navigation, not then yet Royal, where Mach Cruising looked likely to be added to the Constant Power, Constant Speed and Long Range Cruise that we had studied, for Constellations 049, I think.
Last edited by Linktrained; 9th May 2013 at 19:05.