Pening Systems on a 742 plus costs please?

[CargoMatatu]

Used to carry 600 sheep on a 707 some years ago.

45 to a pen.

Based on that, you should be able to get around 1300 (or more) on a 747 main deck.

Be ready for PLENTY of amonia, though! They do pass a lot of water; and it's corosive, you know!