If someone wants to share their technical expertise in a way that would appeal to FFs, specifically of CO, lets talk about the following:

752s from Europe to EWR: given (a) customary prevailing winds, (b) normal passenger weights (including luggage), (c) no weight (ok, 2 tons - packages, etc.) allocated for cargo, and (d) required contingencies (extra fuel load, etc.), which of the airports that CO currently serves require limitations on passenger capacity, and if none, what are the 5-10 largest airports within the range of a 752 that CO doesn't serve? ALso, with assumptions a, b and d, what current 752 trans-atlantic flights are significant cargo carriers?

767s: what other airlines operate 762s using the same engines that CO uses (and, therefore, might be logical sources for CO to explore buying used, compatible widebody a/c)? same question re 764 and 772.

Correction, I look forward to your detailed answers.