Germany completed its first U-boat (the U-1) in 1905 and was the first nation to use a submarine during World War I. By comparison, the U.S. Navy commissioned its first sub (the U.S.S. Holland) in ...

The German U-Boat Autogiro Posted: June 9, 2025 | Last updated: June 9, 2025 During the Second World War the Germans experimented with an interesting rotary wing design known as a 'rotor kite'.

Slow Roll for German U-boat . When operational, the U17 was powered by two 4-stroke MTU 600-horsepower diesel-electric engines, and had a cruising speed of 10 knots surfaced and 17 knots submerged.

Germany's U-505 submarine was the 1st warship captured by the US Navy in over a century and top secret during World War II. See photos of the inside.

The U-853, which lies 121 feet deep and 8 miles east of Block Island, was one of many German U-boats that brought a mostly faraway war to the coastal United States. Advertisement ...