I'm just curious which size bank bag that Carr showed. There is nothing in the files that states the size, which is critical to my theory.
That said, I have done quite a bit of research in this area and think it is very likely that the money was delivered in a canvas currency bank bag size H.
The reasons are that the H bag is the proper size bag for the amount of currency delivered. In other words, the size H bag typically holds 12 to 13 bundles depending upon whether the currency has been circulated. The other options are either too small or very big.
Moreover, the witness testimony regarding the size of the money bag--2' X 1'--also suggests the H bag because it is a flat bag sized 29" X 14" when empty.
One of the statements that was posted in the last few days gave the bag dimensions as 1 foot by 1 foot by 9 inches. This translates to 0.750 cubic feet. I believe these dimensions were given by someone in the NWA Seattle office immediately before the money was taken out to the aircraft.
The dimensions of American currency bills are 6.14 inches by 2.61 inches by 0.0043 inches. For the 10,000 bills given to Cooper, this translates to 0.3988 cubic feet. This is the absolute minimum volume that they could occupy. So the 0.750 cubic feet estimate given above appears to be realistic.
The weight of a bill is given as about 0.04 ounces or about 1 gram. There are 454 grams in a pound. For the 10,000 Cooper bills this translates to 22.03 pounds which is accurate.
Cooper cut about 100 feet of shroud lines from one of the reserve chutes according to Tom Kaye's measurements. This length of lines could wrap around the bill bag more than 25 times. So Cooper could have tied that bundle of bills into a very secure package as well as attach it to himself.