During World War II, Daimler-Benz explored an unconventional fighter concept built around a massive experimental V16 engine.

Sharrow's extraordinary looped propellers were already some 30% more efficient than traditional designs – and now the company has put two of them together into a coaxial, contra-rotating prop that ...

Key point: The current backbone of the Russian strategic bomber force is the Tu-95MS. The Tu-95 is one of the oldest designs in active service in the Russian Air Force. Driven by eight contra-rotating ...