Did Germany have a stealth bomber prototyped during WW2?
Horten Ho 229
In early 2008, Northrop Grumman paired up television documentary producer Michael Jorgensen and the National Geographic Channel to produce a documentary to determine whether the Ho 229 was, in fact, the world's first true "stealth" fighter-bomber.[12] Northrop Grumman built a full-size non-flying reproduction of the V3, made out of wood primarily, unlike the original aircraft which had an extensive steel space-frame to which the wooden skin was bolted. The space-frame for the real aircraft was made from steel tubes up to 160mm in diameter, and provided the entire structure for the center section of the aircraft[14]. After an expenditure of about US$250,000 and 2,500 man-hours, Northrop's Ho 229 reproduction was tested at the company's RCS test range at Tejon, California, where it was placed on a 15-meter (50ft) articulating pole and exposed to electromagnetic energy sources from various angles, using the same three HF/VHF-boundary area frequencies in the 20–50MHz range used by the Chain Home.[12]
Bombe
The bombe () is an electro-mechanical device used by Polish and British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The US Navy and US Army later produced their own machines to the same functional specification, albeit engineered differently both from each other and from Polish and British Bombes.