I guess you could call Finnair's DC8-62CF (hope I got the designation correct for mixed cargo/passenger) in the 60's, 70's and early 80's. I used to work for them at SPL, there was a daily flight from HEL
, and twice a week with a stop in CPH
as well. No less than 13 different configurations, from all-cargo 13 pallets, 66Y and 8 cargo pallets etc. up to 188 all Y configuration mainly for charters. I thought the most unusual was the 66Y config, the cabin looked so tiny when entering the aircraft from the rear. There were different variations also of F and Y with the cargo pallets, usually 12F seats but I can't remember the number in Y.
Also the Super Caravelles were a bit odd in their own way. They had 2 cargo/baggage compartments under the cabin, and another at the very back of the cabin on the right, as you came up the back stairs (the galley was on the left). There could also be a cargo compartment at the very front, behind the front door, and across the aisle behind the galley door, directly in front of F Class cabin. It meant taking out a row of Y seats, so the configuration with that compartment would be
12F Y67 instead of 12F 72Y without the extra cargo compartment. The aircraft was tail heavy anyway, so the compartment in the front of F often helped to balance the aircraft. However, a lot of cargo out of Amsterdam, was flowers on the way to Gothenburg, Sweden (AY846 went AMS
) and flowers are so light that it did not help a lot anyway. When the passenger loads were light, all the passengers had to often sit in the first 7 rows for take off and landing, to balance the aircraft.
Those were interesting and fun times indeed!