Found and Explained Official on MSN

This German plane has a propeller… in the middle?

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

German Aerospace Research Vessel taps Steerprop for Propulsion

Steerprop will deliver its new Contra-Rotating Propeller (CRP) azimuth propulsions to Lloyd Werft Bremerhaven GmbH for a new research vessel being built for the German Aerospace Center (DLR).