1951
DOI: 10.1017/s0373463300032975
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Optimum Flight Paths

Abstract: A condensed version of a paper presented to the Centre Beige de Navigation, Brussels, 9 January 1950.The fact that the most expeditious route between two points on the Earth's surface is not necessarily a great circle is no new discovery. In the days of sailing ships courses were set to take maximum advantage of the wind; the trade winds were so called because they made the voyages of the trading ships possible. To a large extent they dictated the sea lanes and it was not until the arrival of the steamship tha… Show more

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“…For latitude ££°, the line subtends a chart length equal to Kx 10 n.m. where K is the constant in the drift formula. 1 For ££°, the average North Atlantic latitude, therefore, the component can be read off directly as D/10. A table on the template enables the adjustment for other latitudes to be made simply, and gives the scale variations in the lambert conformal upper-air chart.…”
mentioning
confidence: 99%
“…For latitude ££°, the line subtends a chart length equal to Kx 10 n.m. where K is the constant in the drift formula. 1 For ££°, the average North Atlantic latitude, therefore, the component can be read off directly as D/10. A table on the template enables the adjustment for other latitudes to be made simply, and gives the scale variations in the lambert conformal upper-air chart.…”
mentioning
confidence: 99%