aerodyne

Nailed it.

Aerodyne technology, and it covers flight dynamics, power plant propulsion, construction, avionics, and navigation issues.

The author of said document says, in regards to alien tech, that construction methods are unknown at this time.

but alien vehicles travel through space by utilizing the ionizing plasma in the planet's magnetic lines of force.

January 30th, 1996, Cooper received another document that kind of blows your mind.

It talks about loaned crafts, which we've heard about before.

The lone aircraft was designed from an Aerodyne recovered in 1941 in southeastern Missouri and one captured in 1942 in Louisiana.

Reconstruction commenced in 1945 with the assistance of German scientists at Brightfield.