One thing that has always perplexed me is why Cooper did not get a backpack to put the money in. Did he not think that $200k would be as bulky and heavy as it was? He's in Seattle, one of the hiking capitals of the United States. He could simply have asked for a backpack and had a good chance of someone having one at the airport as part of their luggage, or in a store at the airport, or even a store down the street. I wonder what was going on in his mind. Maybe he felt he was a pro with knots and could rig something on his own.
Cooper did ask for a knapsack (or that's what was relayed as the request)
he didn't get it though.
No mention of a knapsack in the original demands conveyed to the crew. Knapsack not named in the Pilot Notes of demands.
Then Tina testifies:
"Mucklow then used a plain envelope to write out the
demands of the hijacker, listing that he wanted four parachutes including two back packs and two chest packs, $200,000 in cash in small bills, and that he wanted everything by “by five o’clock”. Mucklow says that Florence Schaffner delivered this note to the pilot’s compartment, since the hijacker insisted that she stay physically present beside him at all times. She says that she sat with the hijacker from then through almost the whole time from then on (until she was released by the hijacker to go forward to the cockpit). [no mention of knapsack]
The hijacker displayed an extensive knowledge of the aircraft and seemed specifically well informed in refueling procedures to the point that the crew had difficulty in convincing him that only 90% of the required fuel was on board at the time he was protesting the fact that refueling had not been completed.
It was also during this time that he complained to Mucklow that he had requested the money be delivered in a knapsack but instead it was delivered in a cloth type bank bag, which displeased him. It was at this time that Mucklow recalls he stated he would be forced to use one of the parachutes to rewrap the money since he had not been furnished the knapsack."
Knapsack appears to have been lost in the shuffle/translations .... maybe Cooper didn't specify it ? Or it didnt get conveyed . . .