As previously stated, the first two and last images are parts of a propeller, attached to the reduction gear box of the power plant. From the number of bolt holes between the blades it does match the type of propeller installed onto a B-24, but it also was used on the B-17, B-25, C-46, C-47, C-54, TBF/TBM, F4U to name just a few examples. From the images, I believe it to be a Hamilton Standard model 23E50 propeller. From the gears in the broken off reduction gear box, it may be able to tell if it was a Pratt & Whitney or Wright radial power plant.