Three questions decide the aircraft
Shippers usually open a charter enquiry with a tonnage. Tonnage alone almost never decides the aircraft. Three questions do, in this order.
First, loadability: what are the dimensions of the largest single piece? A piece that will not turn through a side cargo door needs a nose-loading 747F; one that cannot fit a main deck at all needs outsize capacity. This question overrides everything else, because an aircraft that cannot accept the cargo is not an option at any price.
Second, volume versus weight: is the cargo dense or bulky? Bulky freight fills the deck before the weight limit, and dense freight does the opposite. Two consignments of identical tonnage can require different aircraft entirely.
Third, sector length: how far, and can it be flown non-stop at your payload? Long sectors force a payload trade or a technical stop, and that trade sometimes makes a larger aircraft the cheaper total answer.
- Largest single piece dimensions, decides loading method, and therefore aircraft family
- Total weight and total cube, decides size within that family
- Sector length and departure airport limits, decides payload trade and stops
- Deadline, decides whether a cheaper, slower option is even on the table

